Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]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
作者:Shi-Sheng Wan、Xiaopeng Xu、Jin-Liang Wang、Gui-Zhou Yuan、Zhao Jiang、Gao-Yang Ge、Hai-Rui Bai、Zheng Li、Qiang Peng
DOI:10.1039/c9ta03177d
日期:——
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) were
在本文中,报告并研究了使用富电子核心单元和基于芳烃的替代性基于1,1-二氰基亚甲基-3-茚满酮(IC)端基的非富勒烯PSC的新协同策略,并试图同时获得优异的PCE,并且低E损失。具体来说,合成了两个基于苯并[1,2- b:4,5- b ']二硒苯的A–D–A型氯化NF-SMA(BDSeThCl和BDSePhCl),它们与新的2-氯噻吩基连接基IC和常规的单氯苯基IC为末端基团。与BDSeThCl相比,BDSePhCl表现出更宽泛的红移吸收和下移能级。的共混物薄膜BDSePhCl:PM7相比,这些均显示出更好的电荷产生的性质,更合适的相分离,和更平衡的电荷迁移率BDSeThCl:PM7。因此,相较于BDSeThCl:PM7共混物与11.91%的最佳PCE和ë损失0.58电子伏特,最优BDSePhCl:PM7共混物显示出13.68%的增强PCE与降低的ë损失0.49电子伏特。值得注意的是,优异的PCE为13