Ternary Organic Solar Cells with Small Nonradiative Recombination Loss

被引：114

作者：

Xie, Yuanpeng ^{[1
]}

Li, Tengfei ^{[2
]}

Guo, Jing ^{[3
]}

Bi, Pengqing ^{[4
]}

Xue, Xiaonan ^{[1
]}

Ryu, Hwa Sook ^{[5
]}

Cai, Yunhao ^{[1
]}

Min, Jie ^{[3
]}

Huo, Lijun ^{[1
]}

Hao, Xiaotao ^{[4
]}

Woo, Han Young ^{[5
]}

Zhan, Xiaowei ^{[2
]}

Sun, Yanming ^{[1
]}

机构：

[1] Beihang Univ, Sch Chem, Beijing 100191, Peoples R China

[2] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

[3] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China

[4] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China

[5] Korea Univ, Coll Sci, Dept Chem, Seoul 136713, South Korea

来源：

ACS ENERGY LETTERS | 2019年 / 4卷 / 05期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

ENERGY-LOSSES; EFFICIENCY; FULLERENE; POLYMER; ENABLES;

D O I：

10.1021/acsenergylett.9b00681

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：

Nonradiative recombination loss (q Delta V-oc(nonrad)) as a large component of energy loss (E-loss), has become an important factor that limits the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, high-performance ternary OSCs based on a polymer donor PTB7-Th, a polymer donor PBDTm-T1, and a nonfullerene acceptor FOIC are reported. When blended with FOIC, the PBDTm-T1-based device yielded a smallest q Delta V-oc(nonrad) of 0.197 eV, but with a moderate PCE of 3.3%. In contrast, the PTB7-Th:FOIC device exhibited a relatively higher q Delta V-oc(nonrad) of 0.329 eV; however, a high PCE of 11.9% was found. This trade-off relationship has been resolved using a ternary blend. By incorporation of 20% PBDTm-T1 into the PTB7-Th:FOIC blend, a small q Delta V-oc(nonrad) value of 0.271 eV and a significantly high PCE of 13.8% were simultaneously obtained. The results demonstrate that the nonradiative recombination loss can be effectively reduced by using a ternary strategy.

引用

页码：1196 / 1203

页数：15

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