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Ternary Organic Solar Cells with Small Nonradiative Recombination Loss AITranslate

Yuanpeng Xie; Tengfei Li; Jing Guo; Pengqing Bi; Xiaonan Xue; Hwa Sook Ryu; Yunhao Cai; Jie Min; Lijun Huo; Xiaotao Hao; Han Young Woo; Xiaowei Zhan; Yanming Sun;
Beihang University; Peking University; Wuhan University; Shandong University; Beihang University; Korea University; Beihang University; Wuhan University; Beihang University; Shandong University; Korea University; Peking University; Beihang University
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Abstract AITranslate

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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DOI：https://doi.org/10.1021/acsenergylett.9b00681

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Citation Information:

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.

quote

GB/T 7714-2015 [1] Yuanpeng Xie, Tengfei Li, Jing Guo, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b00681.
MLA [1] Yuanpeng Xie, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b00681.
APA [1] Yuanpeng Xie, Tengfei Li, Jing Guo, Pengqing Bi, Xiaonan Xue, Hwa Sook Ryu, Yunhao Cai, Jie Min, Lijun Huo, Xiaotao Hao, Han Young Woo, Xiaowei Zhan, & Yanming Sun. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b00681
IEEE [1] Yuanpeng Xie, Tengfei Li, Jing Guo, Pengqing Bi, Xiaonan Xue, Hwa Sook Ryu, Yunhao Cai, Jie Min, Lijun Huo, Xiaotao Hao, Han Young Woo, Xiaowei Zhan, and Yanming Sun, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b00681.