Small bandgap non-fullerene acceptor enables efficient PTB7-Th solar cell with near 0 eV HOMO offset

被引：27

作者：

Li, Chao ^{[1
]}

Yue, Qihui ^{[1
,2
]}

Wu, Hao ^{[1
,2
]}

Li, Baolin ^{[1
]}

Fan, Haijun ^{[2
]}

Zhu, Xiaozhang ^{[1
,2
]}

机构：

[1] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 101408, Peoples R China

[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2021年 / 52卷

基金：

中国国家自然科学基金;

关键词：

Organic solar cells; Non-fullerene acceptors; Small bandgap; Driving force; HOMO offset; ELECTRON-ACCEPTOR; POLYMER; DONOR; PERFORMANCE;

D O I：

10.1016/j.jechem.2020.03.058

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Three small bandgap non-fullerene (SBG NFAs) acceptors, BDTI, BDTI-2F and BDTI-4F, based on a carbon-oxygen bridged central core and thieno[3,4b]thiophene linker, end-capped with varied electron-withdrawing terminal groups, were designed and synthesized. The acceptors exhibit strong absorption from 600 nm to 10 0 0 nm. The optimal device incorporating designed NFA and PTB7-Th polymer donor achieves a power conversion efficiency of 9.11% with near 0 eV HOMO offset. The work presents a case study of efficient non-fullerene solar cells with small HOMO offsets, which is achieved by blending PTB7-Th with fine-tuned SBG acceptor. (c) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

引用

页码：60 / 66

页数：7

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