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polymer solar cell

Bingqing Zhang, Shengyang Wang, Wenjun Fan, Weiguang Ma, Zhenxing Liang, Jingying Shi, Shijun Liao, Can Li
The oxygen reduction reaction (ORR) is a key step in H2 -O2 fuel cells, which, however, suffers from slow kinetics even for state-of-the-art catalysts. In this work, by making use of photocatalysis, the ORR was significantly accelerated with a polymer semiconductor (polyterthiophene). The onset potential underwent a positive shift from 0.66 to 1.34 V, and the current was enhanced by a factor of 44 at 0.6 V. The improvement was further confirmed in a proof-of-concept light-driven H2 -O2 fuel cell, in which the open circuit voltage (Voc ) increased from 0...
October 20, 2016: Angewandte Chemie
Ashish Dubey, Nirmal Adhikari, Swaminathan Venkatesan, Shaopeng Gu, Devendra Khatiwada, Qi Wang, Lal Mohammad, Mukesh Kumar, Qiquan Qiao
This data in brief includes forward and reverse scanned current density-voltage (J-V) characteristics of perovskite solar cells with PDPP3T and spiro-OMeTAD as HTL, stability testing conditions of perovskite solar cell shelf life in air for both PDPP3T and spiro-OMeTAD as HTL as per the description in Ref. [1], and individual J-V performance parameters acquired with increasing time exposed in ambient air are shown for both type of devices using PDPP3T and spiro-OMeTAD as HTL. The data collected in this study compares the device stability with time for both PDPP3T and spiro-OMeTAD based perovskite solar cells and is directly related to our research article "solution processed pristine PDPP3T polymer as hole transport layer for efficient perovskite solar cells with slower degradation" [2]...
June 2016: Data in Brief
Yen-Sook Jung, Jun-Seok Yeo, Nam-Koo Kim, Sehyun Lee, Dong-Yu Kim
We report the effect of binary additives on the fabrication of polymer solar cells (PSCs) based on a bulk heterojunction (BHJ) system. The combination of 1,8-diiodooctane (DIO), a high-boiling and selective solvent, for fullerene derivatives and poly(dimethylsiloxane) (PDMS) precursor, a nonvolatile insulating additive, affords complementary functions on the effective modulation of BHJ morphology. It was found that DIO and PDMS precursor each play different roles on the control of BHJ morphology, and thus, the power conversion efficiency (PCE) can be further enhanced to 7...
October 19, 2016: ACS Applied Materials & Interfaces
Bhaskar Dudem, Yeong Hwan Ko, Jung Woo Leem, Joo Ho Lim, Jae Su Yu
We report the hierarchical nano/micro architectured (HNMA)-polydimethylsiloxane (PDMS) film-based hybrid energy cells with multi-functionality to simultaneously harvest mechanical, solar, and wind energies. These films consist of nano/micro dual-scale architectures (i.e., nanonipples on inverted micro pyramidal arrays) on the PDMS surface. The HNMA-PDMS is replicable by a facile and cost-effective soft imprint lithography (SIL) using a nanoporous anodic alumina oxide (AAO) film formed on the micro-pyramidal (MP) structured silicon substrate...
October 19, 2016: ACS Applied Materials & Interfaces
Hyunbum Kang, Wonho Lee, Jiho Oh, Taesu Kim, Changyeon Lee, Bumjoon J Kim
All-polymer solar cells (all-PSCs), consisting of conjugated polymers as both electron donor (PD) and acceptor (PA), have recently attracted great attention. Remarkable progress has been achieved during the past few years, with power conversion efficiencies (PCEs) now approaching 8%. In this Account, we first discuss the major advantages of all-PSCs over fullerene-polymer solar cells (fullerene-PSCs): (i) high light absorption and chemical tunability of PA, which affords simultaneous enhancement of both the short-circuit current density (JSC) and the open-circuit voltage (VOC), and (ii) superior long-term stability (in particular, thermal and mechanical stability) of all-PSCs due to entangled long PA chains...
October 18, 2016: Accounts of Chemical Research
Dong Jin Lee, G Mohan Kumar, P Ilanchezhiyan, Jae-Chul Lee, Sung Ryong Ryu, Tae Won Kang
Nowadays, solid-state inorganic-organic hybrid solar cells based on one-dimensional (1D) inorganic semiconducting nanostructures and organic polymers are believed to offer convincing solutions for the realm of next generation solar cells. In this regard, 1D ZnCdS nanowire (NW) arrays were fabricated on transparent conducting substrates through a catalyst free co-evaporation method and their wurtzite structural characteristics, 1D morphological layout and valence state/composition were studied in detail using X-ray diffraction, high-resolution electron microscopy and X-ray photoelectron spectroscopy, respectively...
October 5, 2016: Journal of Colloid and Interface Science
Xin-Xing Zhan, Xin Zhang, Si-Min Dai, Shu-Hui Li, Xu-Zhai Lu, Lin-Long Deng, Su-Yuan Xie, Rong-Bin Huang, Lan-Sun Zheng
Despite being widely used as electron acceptor in polymer solar cells, commercially available PC71BM (phenyl-C71-butyric acid methyl ester) usually has a "random" composition of mixed regioisomers or stereoisomers. Here the PC71BM has been isolated into three typical isomers, α-, β1- and β2-PC71BM, for establishing the isomer-dependent photovoltaic performance on change of ternary composition of α-, β1- and β2-PC71BM. Mixing the isomers in a ratio of α:β1:β2=8:1:1 resulted in the best power conversion efficiency (PCE) of 7...
October 13, 2016: Chemistry: a European Journal
Raaghesh Vijayan, K Swathi, K S Narayan
We propose an optimum low-temperature-based annealing procedure for semicrystalline donor-fullerene solar cells that is well-suited for plastic and flexible substrates. This proposed alternate strategy utilizes an external electric field (EF) across the bulk heterojunction (BHJ) film during processing at a desired temperature. This processing technique is studied for different molecular weights of the donor in the BHJ blend films. The films indicate an increase in interchain interactions of the semicrystalline polymer chains and an enhancement in hole mobility with EF-assisted annealing treatment...
October 12, 2016: ACS Applied Materials & Interfaces
Shi Wun Tong, Janardhan Balapanuru, Deyi Fu, Kian Ping Loh
In the short time since its discovery, perovskite solar cells (PSCs) have attained high power conversion efficiency but their lack of thermal stability remains a barrier to commercialization. Among the experimentally accessible parameter space for optimizing performance, identifying an electron transport layer (ETL) that forms a thermally stable interface with perovskite and which is solution-processible at low-temperature will certainly be advantageous. Herein, we developed a mesoporous graphene/polymer composite with these advantages when used as ETL in CH3NH3PbI3 PSCs, and a high efficiency of 13...
October 12, 2016: ACS Applied Materials & Interfaces
Yaping Yu, Yang Wu, Andong Zhang, Cheng Li, Zheng Tang, Wei Ma, Yonggang Wu, Weiwei Li
Conjugated polymers consisting of diketopyrrolopyrrole (DPP) units have been successfully applied in field-effect transistors (FETs) and polymer solar cells (PSCs), while most of DPP polymers were designed as symmetric structures containing identical aromatic linkers. In this manuscript, we design a new asymmetric DPP polymer with varied aromatic linkers in the backbone for application in FETs and PSCs. The designation provides the chance to finely adjust the energy levels of conjugated polymers so as to influence the device performance...
October 12, 2016: ACS Applied Materials & Interfaces
Oksana Ostroverkhova
Organic (opto)electronic materials have received considerable attention due to their applications in thin-film-transistors, light-emitting diodes, solar cells, sensors, photorefractive devices, and many others. The technological promises include low cost of these materials and the possibility of their room-temperature deposition from solution on large-area and/or flexible substrates. The article reviews the current understanding of the physical mechanisms that determine the (opto)electronic properties of high-performance organic materials...
October 10, 2016: Chemical Reviews
T Kastinen, M Niskanen, C Risko, O Cramariuc, T I Hukka
Here, we investigate the effects of both tuning the range-separation parameter of long-range corrected (LRC) density functionals and including dispersion corrections on describing the local optoelectronic properties of polymer-fullerene interfaces that are critical to the performance of polymer solar cells (PSCs). Focusing on recently studied (Chen, et al., Chem. Mater., 2012, 24, 4766-4772) PSC active layers derived from poly(benzodithiophene-co-quinoxaline) and substituted fullerene PC71BM, we compare the performance of global hybrid functionals (B3LYP and B3LYP-D) alongside two LRC functionals (ωB97X and ωB97X-D) and their optimally tuned (OT) analogs (OT-ωB97X and OT-ωB97X-D)...
October 5, 2016: Physical Chemistry Chemical Physics: PCCP
Jongwoo Song, Younah Lee, Boa Jin, Jongdeok An, Hyunmin Park, Hoon Park, Myounghee Lee, Chan Im
To achieve intrinsically light-weight flexible photovoltaic devices, a bulk-heterojunction-type active layer with a narrow-bandgap polymer is still considered as one of the most important candidates. Therefore, detailed information about the charge transfer efficiency from a photo-excited species on an electron-donating polymer to an electron acceptor is an important factor, given that it is among the most fundamental quantitative measures to understand the solar power conversion efficiency, in particular at the initial stage followed by primary exciton formation...
September 29, 2016: Physical Chemistry Chemical Physics: PCCP
Yi Zhang, Peng Gao, Emad Oveisi, Yonghui Lee, Quentin Jeangros, Giulia Grancini, Sanghyun Paek, Yaqing Feng, Mohammad Khaja Nazeeruddin
Interfacial engineering of the meso-TiO2 surface through a modified sequential deposition procedure involving a novel PbI2-HMPA complex pretreatment is conducted as a reproducible method for preparing MAPbI3-based perovskite solar cells providing the highest efficiencies yet reported with polymer HTM layer. Grazing incidence X-ray diffraction depth profiling confirms the formation of a perovskite film with PbI2-rich region close to the electron transport layer (ETL) due to the strong interaction of HMPA with PbI2, which successfully retarded the dissolution of PbI2 phase when depositing the perovskite layer on top...
October 10, 2016: Journal of the American Chemical Society
Jiho Oh, Kakaraparthi Kranthiraja, Changyeon Lee, Kumarasamy Gunasekar, Seonha Kim, Biwu Ma, Bumjoon J Kim, Sung-Ho Jin
Side-chain fluorination of polymers is demonstrated as a highly effective strategy to improve the efficiency of all-polymer solar cells from 2.93% (nonfluorinated P1) to 7.13% (fluorinated P2). This significant enhancement is achieved by synergistic improvements in open-circuit voltage, charge generation, and charge transport, as fluorination of the donor polymer optimizes the band alignment and the film morphology.
September 26, 2016: Advanced Materials
Shengbin Shi, Qiaogan Liao, Yumin Tang, Han Guo, Xin Zhou, Yulun Wang, Tingbin Yang, Yongye Liang, Xing Cheng, Feng Liu, Xugang Guo
Narrow bandgap (1.37-1.46 eV) polymers incorporating a head-to-head linkage containing 3-alkoxy-3'-alkyl-2,2'-bithiophene are synthesized. The head-to-head linkage enables polymers with sufficient solubility and the noncovalent sulfur-oxygen interaction affords polymers with high degree of backbone planarity and film ordering. When integrated into polymer solar cells, the polymers show a promising power conversion efficiency approaching 10%.
September 22, 2016: Advanced Materials
Felix Vüllers, Guillaume Gomard, Jan B Preinfalk, Efthymios Klampaftis, Matthias Worgull, Bryce Richards, Hendrik Hölscher, Maryna N Kavalenka
Inspired by the transparent hair layer on water plants Salvinia and Pistia, superhydrophobic flexible thin films, applicable as transparent coatings for optoelectronic devices, are introduced. Thin polymeric nanofur films are fabricated using a highly scalable hot pulling technique, in which heated sandblasted steel plates are used to create a dense layer of nano- and microhairs surrounding microcavities on a polymer surface. The superhydrophobic nanofur surface exhibits water contact angles of 166 ± 6°, sliding angles below 6°, and is self-cleaning against various contaminants...
September 26, 2016: Small
Jun-Xiang Zhang, Yu Wu, Jia-Cheng Liu, Ren-Zhi Li
An acylhydrazone zinc porphyrin P1 and its coordination polymers (CPs, denoted as P1M, M = Mn, Co, Ni, Cu, Zn) with different metal ions (Mn(2+), Co(2+), Ni(2+), Cu(2+) and Zn(2+)) were synthesized. Then these coordination polymers were assembled into bilayer structured supramolecular chromophores through axially coordinating with anchoring porphyrin AP, and their performance in dye sensitized solar cells was investigated. Our results reveal that the bilayer structured supramolecular chromophore based solar cells show significantly improved photocurrent conversion efficiency...
October 18, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Xiaoru Wen, Jiamin Wu, Meidan Ye, Di Gao, Changjian Lin
A tunnelling contact of polystyrene nanofilm was introduced for the first time at the interface of perovskite/hole transfer layer, leading to a significantly reduced charge recombination. Moreover, such a polymeric contact worked as a hydrophobic encapsulation layer for effectively protecting the perovskite against humidity. The resultant PSCs displayed a peak efficiency of 17.80% (vs. 15.90% of the control cell) and an enhanced stability.
September 15, 2016: Chemical Communications: Chem Comm
Liuyuan Lan, Zhiming Chen, Qin Hu, Lei Ying, Rui Zhu, Feng Liu, Thomas P Russell, Fei Huang, Yong Cao
A novel donor-acceptor type conjugated polymer based on a building block of 4,8-di(thien-2-yl)-6-octyl-2-octyl-5H-pyrrolo[3,4-f]benzotriazole-5,7(6H)-dione (TZBI) as the acceptor unit and 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo-[1,2-b:4,5-b']dithiophene as the donor unit, named as PTZBIBDT, is developed and used as an electron-donating material in bulk-heterojunction polymer solar cells. The resulting copolymer exhibits a wide bandgap of 1.81 eV along with relatively deep highest occupied molecular orbital energy level of -5...
September 2016: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
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