928853-15-0Relevant academic research and scientific papers
An A2-π-A1-π-A2-type small molecule donor for high-performance organic solar cells
Zhang, Qian,Sun, Yanna,Chen, Xianjie,Lin, Zhijing,Ke, Xin,Wang, Xiaoyuan,He, Tian,Yin, Shouchun,Chen, Yongsheng,Qiu, Huayu
, p. 5381 - 5384 (2019)
A new A2-π-A1-π-A2-type small molecule denoted as BDD-IN was synthesized employing a strong electron-withdrawing unit, 3-bis(4-(2-ethylhexyl)-thiophen-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2:4,5-c′]-dithiophene-4,8-dione (BDD
A medium-bandgap small molecule donor compatible with both fullerene and unfused-ring nonfullerene acceptors for efficient organic solar cells
Chen, Xianjie,Ding, Xueyan,Zhang, Qian,Wang, Di,Zhan, Lingling,Lu, Xinhui,Wu, Feifei,Xu, Zheng,Qiu, Huayu,Chen, Wanzhi,Li, Chang-Zhi
, p. 13396 - 13401 (2019)
Here we designed and synthesized a new small molecule donor DRC4TB with an alkylthiothienyl-substituted benzodithiophene as the core and 3-butyl rhodanine as the terminal group, which showed an optical bandgap of 1.87 eV. DRC4TB was compatible with both a
Synthesis and properties of N-carbazole end-capped conjugated molecules
Promarak, Vinich,Ruchirawat, Somsak
, p. 1602 - 1609 (2007)
A series of novel N-carbazole end-capped π-conjugated molecules were synthesized by a divergent approach with the use of bromination, Suzuki cross-coupling, and Ullmann reactions and their physical properties were investigated. In dilute solution, UV-vis
Inclusion of triphenylamine unit in dopant-free hole transport material for enhanced interfacial interaction in perovskite photovoltaics
Jang, Min Ho,Jo, Jea Woong,Lee, Chan Hee,Lee, Jae-Joon,Lee, Ji Hyeon,Lee, Sae Youn
, (2022/02/14)
Dopant-free hole transport material (HTM) has been recognized as an essential material for achieving efficient and stable perovskite photovoltaics (PPVs). Currently, conjugated polymer has emerged as a promising dopant-free HTM; however, its insufficient interaction with perovskite absorbers limits an efficient interfacial passivation and charge extraction when employed in PPVs. In this study, we developed a high-performance dopant-free HTM by the partial substitution of a conjugated polymer with triphenylamine unit. The analysis of the performance of the HTM revealed that the modification of the polymer HTM using triphenylamine unit enhanced its interaction with perovskite and its passivation ability. Furthermore, an increase in the number of face-on orientated crystallites after the triphenylamine substitution enhanced the charge transport ability of the polymer HTM. Consequently, the PPVs fabricated using the triphenylamine-substituted polymer HTM exhibited a high efficiency of 20.4% and an enhanced long-term stability compared to the devices fabricated using a control polymer without triphenylamine-substitution (15.8%).
Photovoltaic small molecule donor as well as preparation method and application thereof
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Paragraph 0040-0043; 0066; 0067, (2019/08/01)
The invention discloses a photovoltaic small molecule donor which is BDD-IN; the BDD-IN takes benzodithiophenone as a central donor unit, 1,3-indene dione as a capped receptor unit and TBT as a PI bridge. The invention further discloses a preparation meth
Donor–acceptor photovoltaic polymers based on 1,4-dithienyl-2,5-dialkoxybenzene with intramolecular noncovalent interactions
Chen, Xue-Qiang,Yao, Xiang,Bai, Tianwen,Ling, Jun,Xiao, Wen-Jing,Wang, Jiandong,Wu, Si-Cheng,Liu, Li-Na,Xie, Guanghui,Li, Jingjing,Lu, Zhengquan,Visoly-Fisher, Iris,Katz, Eugene A.,Li, Wei-Shi
, p. 689 - 698 (2018/02/06)
Donor–acceptor (D–A) conjugated polymers bearing non-covalent configurationally locked backbones have a high potential to be good photovoltaic materials. Since 1,4-dithienyl-2,5-dialkoxybenzene (TBT) is a typical moiety possessing intramolecular S…O interactions and thus a restricted planar configuration, it was used in this work as an electron-donating unit to combine with the following electron-accepting units: 3-fluorothieno[3,4-b]thiophene (TFT), thieno-[3,4-c]pyrrole-4,6-dione (TPD), and diketopyrrolopyrrole (DPP) for the construction of such D–A conjugated polymers. Therefore, the so-designed three polymers, PTBTTFT, PTBTTPD, and PTBTDPP, were synthesized and investigated on their basic optoelectronic properties in detail. Moreover, using [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) as acceptor material, polymer solar cells (PSCs) were fabricated for studying photovoltaic performances of these polymers. It was found that the optimized PTBTTPD cell gave the best performance with a power conversion efficiency (PCE) of 4.49%, while that of PTBTTFT displayed the poorest one (PCE = 1.96%). The good photovoltaic behaviors of PTBTTPD come from its lowest-lying energy level of the highest occupied molecular orbital (HOMO) among the three polymers, and good hole mobility and favorable morphology for its PC71BM-blended film. Although PTBTDPP displayed the widest absorption spectrum, the largest hole mobility, and regular chain packing structure when blended with PC71BM, its unmatched HOMO energy level and disfavored blend film morphology finally limited its solar cell performance to a moderate level (PCE: 3.91%).
