中国物理B ›› 2024, Vol. 33 ›› Issue (10): 107304-107304.doi: 10.1088/1674-1056/ad7728

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Hot carrier cooling in lead halide perovskites probed by two-pulse photovoltage correlation spectroscopy

Yuqing Huang(黄玉清)1, Chaoyu Guo(郭钞宇)1, Lei Gao(高蕾)3, Wenna Du(杜文娜)4, Haotian Zheng(郑浩天)1, Da Wu(吴达)1, Zhengpu Zhao(赵正朴)1, Chu-Wei Zhang(张楚惟)1, Qin Wang(王钦)1, Xin-Feng Liu(刘新风)4,5, Qingfeng Yan(严清峰)3, and Ying Jiang(江颖)1,2,6,†   

  1. 1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;
    2 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;
    3 Department of Chemistry, Tsinghua University, Beijing 100084, China;
    4 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China;
    5 University of Chinese Academy of Sciences, Beijing 100049, China;
    6 Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
  • 收稿日期:2024-08-11 修回日期:2024-08-27 接受日期:2024-09-04 发布日期:2024-09-29
  • 通讯作者: Ying Jiang E-mail:yjiang@pku.edu.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2021YFA1400500), New Cornerstone Science Foundation through the New Cornerstone Investigator Program, and the XPLORER Prize.

Hot carrier cooling in lead halide perovskites probed by two-pulse photovoltage correlation spectroscopy

Yuqing Huang(黄玉清)1, Chaoyu Guo(郭钞宇)1, Lei Gao(高蕾)3, Wenna Du(杜文娜)4, Haotian Zheng(郑浩天)1, Da Wu(吴达)1, Zhengpu Zhao(赵正朴)1, Chu-Wei Zhang(张楚惟)1, Qin Wang(王钦)1, Xin-Feng Liu(刘新风)4,5, Qingfeng Yan(严清峰)3, and Ying Jiang(江颖)1,2,6,†   

  1. 1 International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;
    2 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China;
    3 Department of Chemistry, Tsinghua University, Beijing 100084, China;
    4 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China;
    5 University of Chinese Academy of Sciences, Beijing 100049, China;
    6 Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing 100871, China
  • Received:2024-08-11 Revised:2024-08-27 Accepted:2024-09-04 Published:2024-09-29
  • Contact: Ying Jiang E-mail:yjiang@pku.edu.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2021YFA1400500), New Cornerstone Science Foundation through the New Cornerstone Investigator Program, and the XPLORER Prize.

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摘要： The next-generation hot-carrier solar cells, which can overcome the Shockley--Queisser limit by harvesting excess energy from hot carriers, are receiving increasing attention. Lead halide perovskite (LHP) materials are considered as promising candidates due to their exceptional photovoltaic properties, good stability and low cost. The cooling rate of hot carriers is a key parameter influencing the performance of hot-carrier solar cells. In this work, we successfully detected hot carrier dynamics in operando LHP devices using the two-pulse photovoltage correlation technique. To enhance the signal-to-noise ratio, we applied the delay-time modulation method instead of the traditional power modulation. This advancement allowed us to detect the intraband hot carrier cooling time for the organic LHP CH$_{3}$NH$_{3}$PbBr$_{3}$, which is as short as 0.21 ps. In comparison, the inorganic Cs-based LHP CsPbBr$_{3}$ exhibited a longer cooling time of around 0.59 ps due to different phonon contributions. These results provide us new insights into the optimal design of hot-carrier solar cells and highlight the potential of LHP materials in advancing solar cell technology.

关键词: two-pulse correlation spectroscopy, lead halide perovskites, hot carrier cooling, ultrafast dynamics

Abstract: The next-generation hot-carrier solar cells, which can overcome the Shockley--Queisser limit by harvesting excess energy from hot carriers, are receiving increasing attention. Lead halide perovskite (LHP) materials are considered as promising candidates due to their exceptional photovoltaic properties, good stability and low cost. The cooling rate of hot carriers is a key parameter influencing the performance of hot-carrier solar cells. In this work, we successfully detected hot carrier dynamics in operando LHP devices using the two-pulse photovoltage correlation technique. To enhance the signal-to-noise ratio, we applied the delay-time modulation method instead of the traditional power modulation. This advancement allowed us to detect the intraband hot carrier cooling time for the organic LHP CH$_{3}$NH$_{3}$PbBr$_{3}$, which is as short as 0.21 ps. In comparison, the inorganic Cs-based LHP CsPbBr$_{3}$ exhibited a longer cooling time of around 0.59 ps due to different phonon contributions. These results provide us new insights into the optimal design of hot-carrier solar cells and highlight the potential of LHP materials in advancing solar cell technology.

Key words: two-pulse correlation spectroscopy, lead halide perovskites, hot carrier cooling, ultrafast dynamics

中图分类号:  (Electron states at surfaces and interfaces)

  • 73.20.-r
73.50.Gr (Charge carriers: generation, recombination, lifetime, trapping, mean free paths) 78.47.J- (Ultrafast spectroscopy (<1 psec)) 78.56.-a (Photoconduction and photovoltaic effects)