TY - JOUR
T1 - Ternary Organic Solar Cells with Small Nonradiative Recombination Loss
AU - Xie, Yuanpeng
AU - Li, Tengfei
AU - Guo, Jing
AU - Bi, Pengqing
AU - Xue, Xiaonan
AU - Ryu, Hwa Sook
AU - Cai, Yunhao
AU - Min, Jie
AU - Huo, Lijun
AU - Hao, Xiaotao
AU - Woo, Han Young
AU - Zhan, Xiaowei
AU - Sun, Yanming
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China (NSFC) (Grant Nos. 21734001, 51825301, 21674007, 21702154, and 51773157) and the Natural Science Foundation of Hubei Province (Grant No. 2017CFB118). H.Y.W. acknowledges the financial support from National Research Foundation (NRF) of Korea (2012M3A6A7055540 and 2016M1A2A2940911).
PY - 2019/5/10
Y1 - 2019/5/10
N2 - Nonradiative recombination loss (qΔVocnonrad), as a large component of energy loss (Eloss), 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 qΔVocnonrad of 0.197 eV, but with a moderate PCE of 3.3%. In contrast, the PTB7-Th:FOIC device exhibited a relatively higher qΔVocnonrad 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 qΔVocnonrad 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.
AB - Nonradiative recombination loss (qΔVocnonrad), as a large component of energy loss (Eloss), 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 qΔVocnonrad of 0.197 eV, but with a moderate PCE of 3.3%. In contrast, the PTB7-Th:FOIC device exhibited a relatively higher qΔVocnonrad 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 qΔVocnonrad 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.
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U2 - 10.1021/acsenergylett.9b00681
DO - 10.1021/acsenergylett.9b00681
M3 - Article
AN - SCOPUS:85065579704
VL - 4
SP - 1196
EP - 1203
JO - ACS Energy Letters
JF - ACS Energy Letters
SN - 2380-8195
IS - 5
ER -
