Ternary Organic Solar Cells with Small Nonradiative Recombination Loss

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

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Abstract

Nonradiative recombination loss (qΔVocnonrad), 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 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.

Original languageEnglish
Pages (from-to)1196-1203
Number of pages8
JournalACS Energy Letters
Volume4
Issue number5
DOIs
Publication statusPublished - 2019 May 10

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ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

Cite this

Xie, Y., Li, T., Guo, J., Bi, P., Xue, X., Ryu, H. S., Cai, Y., Min, J., Huo, L., Hao, X., Woo, H. Y., Zhan, X., & Sun, Y. (2019). Ternary Organic Solar Cells with Small Nonradiative Recombination Loss. ACS Energy Letters, 4(5), 1196-1203. https://doi.org/10.1021/acsenergylett.9b00681