Achieving high performance non-fullerene organic solar cells through tuning the numbers of electron deficient building blocks of molecular acceptors

被引：39
作者：
Yang, Lei [1 ]
Chen, Yusheng [1 ]
Chen, Shangshang [2 ]
Dong, Tao [1 ]
Deng, Wei [3 ]
Lv, Lei [1 ]
Yang, Saina [1 ]
Yan, He [2 ,4 ]
Huang, Hui [1 ]
机构：
[1] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 101408, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Hong Kong, Peoples R China
[3] Renmin Univ, Dept Chem, Beijing 100872, Peoples R China
[4] HKUST Shenzhen Res Inst, 9 Yuexing 1st RD,High Tech Pk, Shenzhen 518057, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2016年 / 324卷
基金：
北京市自然科学基金;
关键词：
Organic solar cells; Non-fullerene small molecule; Spiro-bifluorene; Perylene diimide; Nonplanar structure; OPEN-CIRCUIT VOLTAGE; HIGH-EFFICIENCY; POLYMER; DONOR; DIKETOPYRROLOPYRROLE; TRANSPORT; DESIGN;
D O I：
10.1016/j.jpowsour.2016.05.119
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Two analogous dimer and tetramer compounds, SF-PDI2 and SF-PDI4, were designed, theoretically calculated, synthesized, and developed as electron acceptors for organic solar cells. The effects of the number of the electron deficient building blocks on the optical absorption, energy levels, charge transport, morphology, crystallinity, and photovoltaic performance of the molecules were investigated. In combination with two different donors, PTB7-Th and PffBT4T-2OD, the results showed that increasing the numbers of PDI building blocks is beneficial to photovoltaic performance and leads to efficiency over 5%. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：538 / 546
页数：9
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