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Exciton localization in solution-processed organolead trihalide perovskites

Author

Listed:
  • Haiping He

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

  • Qianqian Yu

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

  • Hui Li

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

  • Jing Li

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

  • Junjie Si

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

  • Yizheng Jin

    (Center for Chemistry of High-Performance and Novel Materials and State Key Laboratory of Silicon Materials, Zhejiang University)

  • Nana Wang

    (Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road)

  • Jianpu Wang

    (Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road)

  • Jingwen He

    (Capital Normal University, Beijing Key Lab for Metamaterials and Devices, and Key Laboratory of Terahertz Optoelectronics, Ministry of Education)

  • Xinke Wang

    (Capital Normal University, Beijing Key Lab for Metamaterials and Devices, and Key Laboratory of Terahertz Optoelectronics, Ministry of Education)

  • Yan Zhang

    (Capital Normal University, Beijing Key Lab for Metamaterials and Devices, and Key Laboratory of Terahertz Optoelectronics, Ministry of Education)

  • Zhizhen Ye

    (State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University)

Abstract

Organolead trihalide perovskites have attracted great attention due to the stunning advances in both photovoltaic and light-emitting devices. However, the photophysical properties, especially the recombination dynamics of photogenerated carriers, of this class of materials are controversial. Here we report that under an excitation level close to the working regime of solar cells, the recombination of photogenerated carriers in solution-processed methylammonium–lead–halide films is dominated by excitons weakly localized in band tail states. This scenario is evidenced by experiments of spectral-dependent luminescence decay, excitation density-dependent luminescence and frequency-dependent terahertz photoconductivity. The exciton localization effect is found to be general for several solution-processed hybrid perovskite films prepared by different methods. Our results provide insights into the charge transport and recombination mechanism in perovskite films and help to unravel their potential for high-performance optoelectronic devices.

Suggested Citation

  • Haiping He & Qianqian Yu & Hui Li & Jing Li & Junjie Si & Yizheng Jin & Nana Wang & Jianpu Wang & Jingwen He & Xinke Wang & Yan Zhang & Zhizhen Ye, 2016. "Exciton localization in solution-processed organolead trihalide perovskites," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10896
    DOI: 10.1038/ncomms10896
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    Cited by:

    1. Yiyang Gong & Shuai Yue & Yin Liang & Wenna Du & Tieyuan Bian & Chuanxiu Jiang & Xiaotian Bao & Shuai Zhang & Mingzhu Long & Guofu Zhou & Jun Yin & Shibin Deng & Qing Zhang & Bo Wu & Xinfeng Liu, 2024. "Boosting exciton mobility approaching Mott-Ioffe-Regel limit in Ruddlesden−Popper perovskites by anchoring the organic cation," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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