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September 2018
Synthesis of nanostructured conducting composite films based on reduced graphene oxide and o-phenylenediamine
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Elena Yu. Pisarevskaya, Alexey Yu. Rychagov, Alexander M. Gorbunov, Aleksey A. Averin, Yuriy B. Makarychev, Oleg N. Efimov The chemical interaction of reduced graphene oxide (RGO) and poly-o-phenylenediamine (PPD) was studied. A simple method was proposed for synthesis of thin flexible electroactive conducting films based on reduced graphene oxide and poly-o-phenylenediamine. Thus obtained films were characterized by means of cyclic voltammetry, electrochemical impedance, IR, Raman and XP spectroscopy.

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September 2018
Improvement of polymer:fullerene bulk heterojunction morphology via temperature and anti-solvent effect
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): E. Hleli, S. Alam, A. Saaidia, C. K
September 2018
Understanding the mechanism of PEDOT: PSS modification via solvent on the morphology of perovskite films for efficient solar cells
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Qiaoli Niu, Wentao Huang, Jing Tong, Hao Lv, Yunkai Deng, Yuhui Ma, Zhenhua Zhao, Ruidong Xia, Wenjin Zeng, Yonggang Min, Wei Huang The properties of hole transport layers (HTL) greatly affect the performance of inverted planar heterojunction perovskite solar cells (PSC). To understand the mechanisms involved, solvent treatments to HTL poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) by DMSO, ethanol, ethanol:10
September 2018
Tuning the dedoping process of PEDOT:PSS films using DBU-solvent complexes
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Marisol Reyes-Reyes, Rom
September 2018
Controlling the sensing performance of rGO filled PVDF nanocomposite with the addition of secondary nanofillers
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Deepalekshmi Ponnamma, Solleti Goutham, Kishor Kumar Sadasivuni, Kalagadda Venkateswara Rao, John John Cabibihan, Mariam Al Ali Al-Maadeed This study reports the synthesis and characterization of polyvinylidene fluoride (PVDF) nanocomposites containing binary filler combination of reduced graphene oxide and titanium dioxide (TiO2) nanotubes. The PVDF nanocomposite films prepared by simple solution mixing process showed enhanced thermal and dielectric properties. Sensing performance for the nanocomposites was analyzed in presence of a few industrially significant solvent vapors such as benzene, ethanol, chloroform, acetone, SO2 and liquefied petroleum gas. The variation in sensing properties illustrates the possibility of using this material in detecting a range of solvent vapors. Maximum sensing ability was noticed for the nanocomposite containing 2.5
September 2018
Thermoelectric properties and intrinsic conduction processes in DBSA and NaSIPA doped polyanilines
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Laura Horta-Romar
September 2018
Synthesis and characterization of electroactive PEDOT-TEMPO polymers as potential cathode materials in rechargeable batteries
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Pierre-Olivier Schwartz, Marijana Pejic, Mario Wachtler, Peter B
September 2018
Synthesis and characterization of a conductive and self-healing composite
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Marcela Mantese Sander, Carlos Arthur Ferreira An electrically conductive composite of poly(glycerol sebacate) (PGS) and polypyrrole (PPy) was prepared by solvent free synthesis. The PGS matrix was obtained with a 1:1 proportion of sebacic acid and glycerol. The PPy was prepared by chemical synthesis, using iron chloride as oxidant. Films containing 1, 3 and 5% PPy were prepared by adding the conductive polymer, as a finely dispersed powder, into the PGS pre-polymer matrix. PGS polymerization was confirmed by GPC, ATR-FTIR and NMR. Preparation time of the crosslinked film was decreased by 50% via the addition of PPy. The films were characterized by thermal and dynamic mechanical analysis, indicating a thermally stable composite. The matrix behaved as an elastomer at room temperature. The electrical conductivity of the composite films was in the order of 5
August 2018
Layer-by-layer self-assembly of ternary MoS2-rGO@PPyNTs nanocomposites for high performance supercapacitor electrode
Publication date: September 2018
Source:Synthetic Metals, Volume 243 Author(s): Devalina Sarmah, Ashok Kumar In order to prevent the agglomeration and effective utilization of surface area of reduced graphene oxide (rGO) nanosheets for supercapacitor electrode, layered molybdenum disulfide/ reduced graphene oxide (MoS2/rGO) nanocomposite has been synthesized by layer-by-layer self-assembly of positively charged MoS2 nanosheets with negatively charged graphene oxide (GO) nanosheet followed by vacuum-drying and hydrothermal reduction of GO. Ternary MoS2-rGO@PPyNTs nanocomposites were obtained by combining pre-synthesized Polypyrrole nanotubes (PPyNTs) with layered MoS2-GO followed by in-situ hydrothermal reduction of GO. The porous layered structure of MOS2-rGO nanocomposite provides enormous surface area, enhanced electronic conductivity and additional electro-active sites. MoS2-PPyNTs, rGO-PPyNTs and PPyNTs electrodes were also prepared and compared their electrochemical performance with the ternary electrode. The synergetic effect of layer-by-layer assembly of MoS2 and rGO nanosheets with PPyNTs imparts immense electrochemical activity with an extraordinary specific capacitance of 1561.25
August 2018
Editorial Board
Publication date: August 2018
Source:Synthetic Metals, Volume 242

August 2018
Influence of boron content on the structure and capacitive properties of electrospun polyacrylonitrile/pitch-based carbon nanofiber composites
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Seong Ho Kim, Bo-Hye Kim Electrospun boron-enriched PAN/pitch-based CNF composites (PPB) are developed by combining B2O3 as the boron source, and pitch and polyacrylonitrile as the carbon precursor, to introduce surface boron heteroatoms and enhance the electrical conductivity in CNF composites. PPB-10 electrodes prepared from 10
August 2018
New approach to electrochemical reactivity of aniline tetramer through a combined view of DFT and CV descriptors
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Nuno A. Barbosa, Kamil W
August 2018
Terpinolene processed PTB7:PC71BM blend film for polymer solar cells: a non-aromatic and non-chlorinated solvent predicted by Hansen solubility parameters
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Chang Liu, Yongxiang Zhu, Jinxiang Chen, Haitao Wang, Yong Cao, Junwu Chen Terpinolene (TPO), a natural and safe substance for food and cosmetic additives, was selected as a solvent to replace chlorobenzene (CB)-type solvents for solution processing of polymer solar cells (PSCs). Hansen solubility parameters (HSPs) of TPO, with
August 2018
The effect of crystalline defects and geometry factors of multi-walled carbon nanotubes on electrical conductivity of silver-nitrile butadiene rubber composites
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Dongmok Lee, Taehun Kim, C. Muhammed Ajmal, Seunghyun Baik It is important to construct effective electrical network to achieve high electrical conductivity of soft polymer matrix composites. We previously employed one-dimensional multi-walled carbon nanotubes (MWNTs) decorated with silver nanoparticles (nAg-MWNTs) and micron-sized silver flakes in a nitrile butadiene rubber matrix to develop highly conductive flexible adhesive (CFA) films. However, the effect of intrinsic physical properties of MWNTs on the conductivity of CFA was not explored in detail. Here we investigated the influence of crystalline defects and geometry factors of MWNTs on the electrical conductivity of CFA films. The nAg-MWNTs were synthesized using five different MWNTs. The electrical conductivity of the CFA films decreased significantly with an increase in Raman D- to G-mode ratio demonstrating the crystallinity effect. There was the tube diameter dependence. The conductivity increased as the diameter of MWNTs decreased. The dispersion was also a determining factor. The strongly entangled structure of MWNTs originated from the initial synthesis process caused aggregation of tubes in the polymer matrix resulting in a low conductivity of CFA film. However, the tube length dependence was not obvious in the investigated range (520
August 2018
Fast switching soluble electrochromic polymers obtained from a 4,9-Dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-embedded system
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Yongqiang Pang, Yijie Tao, Chaoyang Zhang, Haifeng Cheng A series of conjugated polymers containing 4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene (IDT) and 3,4-ethylenedioxythiophene (EDOT) or benzo[c][1,2,5]thiadiazole (Tz) are successfully synthesized via Stille coupling polymerization with reasonable yields as well as high molecular weights. The synthesized polymers can dissolve in chloroform, toluene, THF, etc. Additionally, the physical, optical and electrochemical properties of these synthesized polymers are fully characterized. After a film is spin-coated on the ITO electrode, the prepared polymer films present remarkable electrochromic behaviors. Increasing the composition of electron-rich EDOT along with the conjugated backbone of the synthesized D-A polymer is shown to induce red-shift of the short-wavelength absorption band and blue-shift of the long-wavelength counterpart. On the other hand, as the strong electron-deficient benzo[c][1,2,5]thiadiazole (Tz) incorporates into all-donor polymer mainchain, a new low-energy absorption band due to the intramolecular charge transfer of D-A interaction emerges and the corresponding intensity intensifies with the composition of electron-deficient moieties increasing. In addition, the prepared IDT-based polymers also exhibit fast switching response and good stability.

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August 2018
Synthesis and Characterization of GO/V2O5 Thin Film Supercapacitor
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): S. Korkmaz, F. Meydaneri Tezel,
August 2018
Synthesis and characterization of an acenaphthenefused,
August 2018
Magnetoresistance mechanisms in carbon-nanotube yarns
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Reza Ghanbari, Shaban Reza Ghorbani, Hadi Arabi, Javad Foroughi Carbon nanotube (CNT) yarns are novel CNT-based materials that extend the advantages of CNT from the nanoscale to macroscale applications. Herein we have modeled the electrical properties of carbon nanotube yarn as a function of temperature and magnetic field. The conductivity was well explained by 3D Mott Variable Range Hopping (VRH) law at T
August 2018
Diffusion controlled vapour deposition of mixed doped PEDOT
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): S. Rudd, P.J. Murphy, D.R. Evans Poly(3,4-ethylenedioxy thiophene) (PEDOT) displays many interesting properties from high electrical and thermal conduction to efficient electrocatalytic behaviour. Herein we report the vapour phase polymerization of PEDOT where ionic diffusion of two different doping anions in the oxidant layer during polymerisation is controlled, removing the need for ion exchange during post-processing. This one step process leads to PEDOT doped with both tosylate and perchlorate, possessing properties not achievable using the individual anions, simple mixtures thereof, or other experimental pathways.

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August 2018
Enhancement of microstructure and electrical conductivity of N, N
August 2018
The influence of the position of a chiral substituent on undecathiophene chain. A DFT study
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Jan Cz. Dobrowolski, Piotr F.J. Lipi
August 2018
Electrochemical performance and stability of a PPy/MMT-PVDF/PMMA composite film at high temperature
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Shuo Yang, Xuan Li, Huijun Li, Pei Yao A polypyrrole/montmorillonite-polyvinylidenedifluoride/polymethyl methacrylate (PPy/MMT-PVDF/PMMA) composite film was prepared by a solvent casting technique. The surface morphology and cross-sectional structure of the 12
August 2018
Nanocubic CoFe2O4/graphene composite for superior lithium-ion battery anodes
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Zhiwei Yang, Yuan Huang, Jian Hu, Lingling Xiong, Honglin Luo, Yizao Wan High-performance anode materials are highly desirable to the application of lithium-ion batteries (LIBs) in electric/hybrid electric vehicles and renewable energy storage. Herein, a nanocomposite composed of CoFe2O4 nanocubes homogeneously dispersed and closely stuck on graphene (CoFe2O4/G) has been constructed via a facile one-pot strategy. The obtained results show that the introduced graphene oxide can trigger the formation of nanocubic CoFe2O4 and the intimate interfacial contact between CoFe2O4 and graphene can be achieved. The CoFe2O4/G electrode displays outstanding cycling performance (1109
July 2018
High performance ITO-free white organic light-emitting diodes using highly conductive PEDOT:PSS transparent electrodes
Publication date: August 2018
Source:Synthetic Metals, Volume 242 Author(s): Jonghee Lee, Yong Hyun Kim We report high performance white organic light-emitting diodes (OLEDs) based on high conductivity poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films optimized by a solvent post treatment. The device stack is carefully optimized with high efficiency tandem structures including red, yellow/green, and blue emissive materials. The OLED with the PEDOT:PSS transparent electrode achieves a high power efficiency of 26.1
July 2018
Editorial Board
Publication date: July 2018
Source:Synthetic Metals, Volume 241

July 2018
Synthesis and anhydrous proton conductivity of doped azole functional PGMA-hBN nano-flakes
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Abdulmalik Yusuf, Sevim
July 2018
Organic light-emitting diodes based on PVK and Zn(II) salicylidene composites
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Jos
July 2018
Synthesis of PPy/RGO-based hierarchical material with super-paramagnetic behavior and understanding its robust photo current driven by visible light
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Wenyan Zhang, Chen Shen, Gongxuan Lu, Yaru Ni, Chunhua Lu, Zhongzi Xu In this work, a PPy/RGO-based hierarchical material, Fe3O4@Pt@PPy@RGO, was constructed by enveloping hollow Fe3O4 microspheres and Pt nano-particles (NPs) into polypyrrole (PPy) shell, and then binding the core-shell nano-composites with graphene oxide (GO) membranes by UV irradiation for 12
July 2018
Photo-degradation in air of spin-coated PC60BM and PC70BM films
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Vanja Blazinic, Leif K.E. Ericsson, Stela Andrea Muntean, Ellen Moons The fullerene derivatives PC60BM and PC70BM are widely used as electron accepting components in the active layer of polymer solar cells. Here we compare their photochemical stability by exposing thin films of PC60BM and PC70BM to simulated sunlight in ambient air for up to 47
July 2018
Conjugated, rod-like viologen oligomers: Correlation of oligomer length with conductivity and photoconductivity
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Long Chen, Elodie Vivier, Charlotte J. Eling, Tahkur S. Babra, Jean-Sebastien G. Bouillard, Ali M. Adawi, David M. Benoit, Franti
July 2018
Fe/Nx clusters embedded in graphene with tunable properties for gas separation
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Afshan Mohajeri, Akbar Omidvar Increasing concerns about capture and separation of CO2 and its impact on the global warming are motivating researchers to discover new materials and strategies for efficient CO2 capture. Here, we explored the possibility of conductive Fe/Nx clusters embedded in graphene (Fe/Nx/G) as an adsorbent for electrocatalytically switchable CO2 capture. Using density functional theory including long-range dispersion corrections, we investigated the adsorption process of CO2 on Fe/Nx/G (x
July 2018
Cross-linked PEDOT: PSS as an alternative for low-cost solution-processed electronic devices
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Renan Colucci, Matheus Henrique Quadros, Fl
July 2018
Synthesis and characterization of thiophene-mediated hole transport materials for perovskite solar cells
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Zia-Ur-Rehman, Aamer Saeed, Muhammad Faisal One of the most exciting fields in the search for renewable energy sources are perovskite solar cells (PSCs) whose power conversion efficiency (PCE) has increased from less than 5% to a certified value of over 22.0% in an incredibly short time. Hole transport materials (HTMs) are the vital part of PSCs, and a large number of HTMs have been developed until now. The design and development of molecular architecture that provides excellent transporting properties has become the most challenging issue for chemists. Among all HTMs, thiophene-based HTMs are found to be the most promising ones. This mini-review provides an adequate amount of information about the thiophene-based HTMs, i.e., summarizes and discusses their synthetic routes and device parameters such as short-circuit current (Jsc), open-circuit voltage (Voc), and percent conversion efficiency (PCE). The results of this work will be helpful to further improve the technological performance of this process. Hopefully, this review will be supportive of new opinions in the quest for designs of more effective thiophene-based HTMs.

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June 2018
Influence of interfacial polymerization on the crystallinity, molecular weight, conductivity and redox behavior of poly(2,3-dimethyl aniline)
Publication date: July 2018
Source:Synthetic Metals, Volume 241 Author(s): Subrata Mondal, Sukanya Bera, M.V. Sangaranarayanan The synthesis of crystalline nanofibers of poly (2,3-dimethyl aniline) using interfacial polymerization is reported with dichloromethane-water and hexane-water interfaces as illustrations. Apart from the differences in the morphology, molecular weight and conductivity, there exist remarkable variations in the optical and electrical properties of the interfacially synthesized polymer in comparison with the conventional single phase method. Furthermore, the morphologies and conductivities of the polymer vary with the choice of interfaces and are attributed to the rate of polymerization as well as the solvent polarity. The origin of the crystallinity is ascribed to the reaction kinetics as well as nature of the oxidant. The electrochemical sensing of hydrogen peroxide using poly (2, 3-dimethyl aniline)-coated glassy carbon electrodes is investigated in neutral phosphate buffer solutions.

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June 2018
Editorial Board
Publication date: June 2018
Source:Synthetic Metals, Volume 240

June 2018
Synthesis of a new phenothiazine-carbazole polymer derivative and utilization in an electrochromic cell
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Young Chul Choi, Rangaraju Satish Kumar, Naveen Mergu, Jaemyeng Jeong, Young-A Son In this study, a phenothiazine-carbazole electrochromic copolymer (CNU-CKP) was designed and prepared and fully confirmed by their 1H NMR, FT-IR, UVvis, GPC and CV analyses. For this copolymer, we investigated its electrochromic properties by making an electrochromic cell. This cell consisted of polymer-spray-coated ITO glass and a gel electrolyte. We achieved good cyclic stability and electrochromic switching results with interesting color changes. Finally, the experimental results were compared with theoretical studies.

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June 2018
Performance analysis and negative dielectric anisotropy behavior of nematic liquid crystal doped with newly synthesized 1-(p-chlorobenzyl)-5-nitrobenzimidazole cobalt complex
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Ersin Orhan, Muharrem G
June 2018
Small-molecule acceptors based on 4H-cyclopenta[1,2-b:5,4-b
June 2018
Triphenylamine/oxadiazole hybrids differing by the substitution pattern: Influence on the electroluminescence properties of yellow and green emitting diodes
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Marc Lepeltier, Xavier Sallenave, Denis Tondelier, Gjergji Sini, Fabrice Goubard, Didier Gigmes, Bernard Geffroy, Fr
June 2018
Low bandgap diketopyrrolopyrrole-based polymers with an asymmetric unit of fluoridated phenylene-thiophene for efficient polymer solar cells
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Xianghua Zeng, Zhanfeng Li, Jingkun Ren, Tianxiang Ge, Zemao Zang, Qinjun Sun, Hua Wang, Yuying Hao Two low bandgap copolymers (PDPP-PT and PDPP-PTF2) based on asymmetrical phenylene-thiophene as donor unit and diketopyrrolopyrrole as acceptor unit were developed for polymer solar cells. Their thermal, optical, electronic properties and photovoltaic performances were systematically investigated. Both polymers exhibited narrow bandgaps (below 1.5
June 2018
Synthesis and characterization of poly(3-hexylthiophene)-grafted polyvinyl alcohol
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Thien An Phung Hai, Ryuichi Sugimoto Poly(3-hexylthiophene) (P3HT) was grafted onto the surface of polyvinyl alcohol (PVA) through simple chemical oxidative polymerization with FeCl3 in three different solvents, namely acetonitrile, chloroform, and hexane. Among these solvents, hexane best stimulated the grafting of P3HT to PVA; the modified PVA was obtained with a high grafting ratio and molecular weight. The resultant modified PVA was characterized by Fourier-transform infrared (FT-IR), ultraviolet visible (UVvis), fluorescence spectroscopies, X-ray diffraction (XRD), as well as thermo gravimetric analysis (TGA), contact angle and field emission scanning electron microscopy (FE SEM) coupled with energy dispersive X-ray (EDX) analysis. The presence of P3HT on the PVA surface imparted hydrophobic character, and the PVA modified with P3HT exhibited enhanced electrical conductivity compared to PVA. The peaks in the XRD spectrum of PVA were less intense following P3HT grafting to the PVA surface, and the build-up of P3HT on the PVA surface led to the appearance of absorption and emission peaks in the visible wavelength range. PVA was less stable following grafting by P3HT and the existence of elemental sulfur originating from P3HT was detected on the modified PVA by FE-SEM elemental mapping.

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June 2018
A comprehensive investigation of organic active layer structures toward high performance near-infrared phototransistors
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Yuanlong Liang, Wenli Lv, Xiao Luo, Lan He, Kun Xu, Feiyu Zhao, Fobao Huang, Feiping Lu, Yingquan Peng Tin phthalocyanine (SnPc) is a kind of organic semiconductor material with excellent absorbing characteristic in near-infrared (NIR) region but rarely applied in photosensitive organic field-effect transistors (PhOFETs). Here, a series of SnPc based PhOFETs with different active layer structures were fabricated and characterized for the purpose of making a systematic investigation of organic active layer structure toward NIR phototransistors. Among the sample devices with different active layer structures, the tri-layer planar heterojunction structure of Device C exhibits high photoresponsivity of 2686.1
June 2018
Investigating the contact material influence on didodecyloxy-PPE OFETs
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Stefanie Schmid, Silke Koser, Christian Melzer, Eric Mankel, Uwe H.F. Bunz In this contribution we discuss the impact of the contact formation between semiconductor and source and drain contact on the device performance of bottom-contact top-gate organic field-effect transistors (OFETs) based on fibrillary semiconducting networks of poly(2,5-didodecyloxy-para-phenyleneethynylene) (D-OPPE). We show that the density and strength of the junctions between the D-OPPE fibers and the electrodes is likewise essential for the device performance as the electronic match of the involved materials and can even predominate the electronical effect. Due to the large bandgap of D-OPPE, high work function contacts are required to allow for efficient hole injection. MoO3 interlayers are known to improve the hole injection and thus commonly the device performance of p-channel OFETs. Indeed, photoelectron spectroscopy revealed a significant hole injection barrier reduction of 0.7
June 2018
Metallic conductivity beyond the Mott minimum in PEDOT: Sulphate at low temperatures
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Dominik Farka, Andrew O.F. Jones, Reghu Menon, Niyazi Serdar Sariciftci, Philipp Stadler Elastic scattering mechanisms dominate the charge transport in crystalline metals, resulting in a characteristic increase in conductivity at low temperatures. However, disorder arising, for example, from alloying can hamper transport and lead to decreased coherence among scattered electrons (i.e. inelastic scattering). This is typically the situation in non-crystalline metals. Likewise, conductive polymers are particularly prone to defect states with decreased carrier mobility (i.e. electrical conductivity). We present the first report of conduction in the elastic scattering regime in conductive polymers without the detrimental effect on conductivity. As in a crystalline metal, conductivity increases upon cooling. More specifically, we observed a minimum conductivity in free-standing metallic PEDOT:sulphate at around 4
May 2018
Density-functional theoretical study of fluorination effect on the electronic structure and electron drift mobilities of symmetric pentacene derivatives
Publication date: June 2018
Source:Synthetic Metals, Volume 240 Author(s): Vladim
May 2018
Editorial Board
Publication date: May 2018
Source:Synthetic Metals, Volume 239

May 2018
Clip-like polyaniline nanofibers synthesized by an insitu chemical oxidative polymerization and its strong electrorheological behavior
Publication date: May 2018
Source:Synthetic Metals, Volume 239 Author(s): Qingkun Wen, Kai He, Chengwei Wang, Baoxiang Wang, Shoushan Yu, Chuncheng Hao, Kezheng Chen We fabricated a clip-like polyaniline (PANI) nanofiber by using an insitu chemical oxidative polymerization assisted with a surfactant mixed system. First of all, three kinds of surfactants (cetyltrimethyl ammonium bromide (CTAB), polyvinyl pyrrolidone (PVP), sodium dodecyl benzene sulfonate (SDBS)) were used to provide different mixing combination. The combination of different surfactants has an important role on the morphology of obtained PANI nanoparticles. We propose possible synthetic mechanisms which CTAB and PVP as a structure directing agent plays the role of template to adjust the morphology. The morphology of clip-like PANI nanofibers has been characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The structure was characterized by X-ray powder diffraction, transform infrared spectroscopy (FTIR) and Thermo Gravimetric Analyzer (TGA). Moreover, the electrorheological (ER) behavior of clip-like polyaniline nanofibers was characterized by rotational rheometer.

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May 2018
Revealing the anisotropy in thermoelectric transport performances in CNT/PANI composites
Publication date: May 2018
Source:Synthetic Metals, Volume 239 Author(s): Jikun Chen, Liming Wang, Dudi Ren, Yanhui Chu, Yong Wu, Kangkang Meng, Jun Miao, Xiaoguang Xu, Yong Jiang Although the carbon nanotube (CNT) based organic composites thermoelectric materials arouses considerable attentions, up to now the anisotropy in their thermoelectric performances has been overlooked. Herein, strong anisotropy in the temperature-dependent thermal and electrical transport properties have been demonstrated for organic composites thermoelectric materials, made by cold pressing the CNT powders coated by in situ polymerized polyaniline (PANI). The Seebeck coefficient, electrical and thermal conductivity are larger along the direction perpendicular to the cold pressing axis compared to the direction parallel to pressing axis. The anisotropy observed in the thermal conductivity and electrical conductivity maximizes at a CNT content of 3040% (expressed in mass%), while the one observed for the Seebeck coefficient is small. The highest thermoelectric performances of the thermoelectric composites are achieved at a CNT mass ratio of
May 2018
Impact of Ag@SiO2 core-shell nanoparticles on the photoelectric current of plasmonic inverted organic solar cells
Publication date: May 2018
Source:Synthetic Metals, Volume 239 Author(s): Kekeli N'Konou, Malika Chalh, Virginie Monnier, Nicholas P. Blanchard, Yann Chevolot, Bruno Lucas, Sylvain Vedraine, Philippe Torchio We report on the influence of silver-silica core-shell nanoparticles (Ag@SiO2 NPs) and bare silver nanoparticles (Ag NPs) on the photoelectric current of plasmonic inverted organic solar cells. The synthesized Ag@SiO2 NPs are deposited on a zinc oxide layer. The optimized plasmonic devices concern the Ag@SiO2 NPs with 5

Electrochromic behavior of poly(pyridinium triflates) films: Electrolyte ions influence
Publication date: May 2018
Source:Synthetic Metals, Volume 239 Author(s): D.G. Frolov, M.M. Petrov, E.E. Makhaeva, M.L. Keshtov, A.R. Khokhlov Electrochromic properties of two poly(pyridinium) salts (PV1 and PV2 with additional methyl substituent) in different supporting electrolytes were investigated. KCl, NaCl, LiCl and KBr supporting electrolytes were used to analyze the ions transfer due to ions size variation. The electrochromic properties of polymer films were examined by electrochemical and spectroelectrochemical methods. Both polymers demonstrate reversible redox process in all studied supporting electrolytes. In general, replacement of K+ ions by Li+ or Na+ ions leads to deterioration in the optical contrast and coloring time in contrast to bleaching time which is improved for both studied polymers. The reason behind this is thought to be an increasing cation size obstructing the cation transport in redox reactions. Comparing the relative changes in polymer electrochromic characteristics by the electrolyte replacement is less significant for PV2 films. The replacement of supporting electrolyte anions has practically no effect on the electrochromic properties of both polymers.
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