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1. A two-dimensional halogenated thiophene side-chain strategy for balancing Vₒc and Jₛc and improving efficiency of non-fullerene small molecule acceptor-based organic solar cells

Author:
Wan, Shi-Sheng,   et al.   ; Yuan, Gui-Zhou; Fan, Haijun; Jiang, Zhao; Liu, Yan-Qiang; Liu, Kai-Kai; Bai, Hai-Rui; Zhu, Xiaozhang; Wang, Jin-Liang;     Show all 9 Authors
Source:
Journal of materials chemistry A 2019 v.7 no.35 pp. 20274-20284
ISSN:
2050-7496
Subject:
absorbance; crystal structure; dissociation; energy; films (materials); mixing; polymers; separation; solar cells; thiophene
Abstract:
... A two-dimensional (2D) halogenated thiophene side chain strategy was proposed and two new 2D halogenated electron-rich fused central core units, FBDT and ClBDT, based on linear benzo[1,2-b:4,5-b′]di(cyclopenta[2,1-b:3,4-b′]dithiophene) with fluorinated and chlorinated thiophene side chains have been developed for the first time, respectively. Then, a family of multihalogenated A–D–A structured non ...
DOI:
10.1039/c9ta06311k

2. Benzo[1,2-b:4,5-b′]diselenophene-fused nonfullerene acceptors with alternative aromatic ring-based and monochlorinated end groups: a new synergistic strategy to simultaneously achieve highly efficient organic solar cells with the energy loss of 0.49 eV

Author:
Wan, Shi-Sheng,   et al.   ; Xu, Xiaopeng; Wang, Jin-Liang; Yuan, Gui-Zhou; Jiang, Zhao; Ge, Gao-Yang; Bai, Hai-Rui; Li, Zheng; Peng, Qiang;     Show all 9 Authors
Source:
Journal of materials chemistry A 2019 v.7 no.19 pp. 11802-11813
ISSN:
2050-7496
Subject:
absorption; energy; separation; solar cells
Abstract:
... Herein, a new synergistic strategy using electron-rich core units and alternative aromatic structure-based 1,1-dicyanomethylene-3-indanone (IC) end-groups for nonfullerene PSCs was reported and investigated in an attempt to simultaneously obtain excellent PCE with extremely low Eₗₒₛₛ. Specifically, two benzo[1,2-b:4,5-b′]diselenophene-based, A–D–A-type chlorinated NF-SMAs (BDSeThCl and BDSePhCl) w ...
DOI:
10.1039/c9ta03177d