Journal ArticleDOI
Side-Chain Effect on Cyclopentadithiophene/Fluorobenzothiadiazole-Based Low Band Gap Polymers and Their Applications for Polymer Solar Cells
Yongxi Li,Yongxi Li,Jingyu Zou,Hin-Lap Yip,Chang-Zhi Li,Yong Zhang,Chu-Chen Chueh,Jeremy J. Intemann,Yun-Xiang Xu,Po-Wei Liang,Yu Chen,Alex K.-Y. Jen +11 more
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TLDR
In this paper, a series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized.Abstract:
A series of cyclopentadithiophene-based low band gap conjugated polymers with varied side-chain patterns and F-substituents were synthesized. By replacing the shorter 2-ethylhexyl (EH) side-chain with the longer 3,7-dimethyloctyl (DMO) side-chain, it resulted in significant changes to the optical, electrochemical, and morphological properties of the polymers, as well as the subsequent performance of devices made from these materials. Solar cells fabricated from polymer with 2-ethylhexyl (EH) side-chain and monofluoro substituent exhibits increased open circuit voltage, short circuit current and fill factor, resulting in the highest power conversion efficiency (5.5%) in this series of polymers. This finding provides valuable insight for making more efficient low band gap polymers.read more
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High Efficiency Near-Infrared and Semitransparent Non-Fullerene Acceptor Organic Photovoltaic Cells
TL;DR: The absence of near-infrared (NIR) solar cells with high open circuit voltage (Voc) and external quantum efficiency (EQE) has impeded progress toward achieving organic photovoltaic (OPV) power conversion efficiency PCE > 15%.
Journal ArticleDOI
Importance of the Donor:Fullerene Intermolecular Arrangement for High-Efficiency Organic Photovoltaics
Kenneth R. Graham,Kenneth R. Graham,Clément Cabanetos,Justin P. Jahnke,Matthew N. Idso,Abdulrahman El Labban,Guy Olivier Ngongang Ndjawa,Thomas Heumueller,Koen Vandewal,Alberto Salleo,Bradley F. Chmelka,Aram Amassian,Pierre M. Beaujuge,Michael D. McGehee +13 more
TL;DR: This work demonstrates that the polymer:fullerene arrangement and resulting intermolecular interactions may be key factors in determining the performance of OPV material systems.
Journal ArticleDOI
Recent progress of high performance polymer OLED and OPV materials for organic printed electronics
TL;DR: The basic guidelines for material design and the recent progress of polymer-based organic light-emitting diodes (OLEDs) and organic photovoltaic cells (OPVs) are reported.
Journal ArticleDOI
A near-infrared non-fullerene electron acceptor for high performance polymer solar cells
Yongxi Li,Lian Zhong,Bhoj Gautam,Haijun Bin,Jiu-Dong Lin,Fu-Peng Wu,Zhanjun Zhang,Zuo-Quan Jiang,Zhi-Guo Zhang,Kenan Gundogdu,Yongfang Li,Yongfang Li,Liang-Sheng Liao +12 more
TL;DR: In this article, a low-bandgap (143 eV) non-fullerene electron acceptor (BT-IC) bearing a fused 7-heterocyclic ring with absorption edge extending to the near-infrared (NIR) region was specially designed and synthesized.
Journal ArticleDOI
Non-fullerene acceptor with low energy loss and high external quantum efficiency: towards high performance polymer solar cells
Yongxi Li,Xiaodong Liu,Fu-Peng Wu,Yi Zhou,Zuo-Quan Jiang,Bo Song,Yuxin Xia,Zhi-Guo Zhang,Feng Gao,Olle Inganäs,Yongfang Li,Yongfang Li,Liang-Sheng Liao +12 more
TL;DR: A non-fullerene electron acceptor bearing a fused 10-heterocyclic ring with a narrow band gap (∼1.5 eV) was designed and synthesized in this paper.
References
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Journal ArticleDOI
Synthesis of Conjugated Polymers for Organic Solar Cell Applications
TL;DR: Fluorene-Based Copolymers ContainingPhosphorescent Complexes and Carbazole-Based Conjugated Polymers R5.1.3.
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Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure
TL;DR: In this article, the authors showed that PFN can be incorporated into polymer light-emitting devices (PLEDs) to enhance electron injection from high-work-function metals such as aluminium (work function w of 4.3 eV) and gold (w ¼ 5.2 eV).
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Fluorine Substituted Conjugated Polymer of Medium Band Gap Yields 7% Efficiency in Polymer-Fullerene Solar Cells
TL;DR: The resulting fluorinated polymer PBnDT-FTAZ outperforms poly(3-hexylthiophene), the current medium band gap polymer of choice, and thus is a viable candidate for use in highly efficient tandem cells.
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Rational Design of High Performance Conjugated Polymers for Organic Solar Cells
TL;DR: The research community has made great progress in the field of bulk heterojunction (BHJ) polymer solar cells since its inception in 1995 as mentioned in this paper and the power conversion efficiency (PCE) has increased from 1% in the 1990s to over 8% just recently.
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Development of fluorinated benzothiadiazole as a structural unit for a polymer solar cell of 7 % efficiency.
TL;DR: F fluorine is the mostelectronegative element, with a Pauling electronegativity of 4.0, which is much larger than that of hydrogen (2.2), and these fluorine atoms often have a great influence on inter- and intramolecular interaction.