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

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

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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 CH3NH3PbBr3,which is as short as 0.21 ps.In comparison,the inorganic Cs-based LHP CsPbBr3 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.

two-pulse correlation spectroscopylead halide perovskiteshot carrier coolingultrafast dynamics

黄玉清、郭钞宇、高蕾、杜文娜、郑浩天、吴达、赵正朴、张楚惟、王钦、刘新风、严清峰、江颖

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International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China

Department of Chemistry,Tsinghua University,Beijing 100084,China

CAS Key Laboratory of Standardization and Measurement for Nanotechnology,National Center for Nanoscience and Technology,Beijing 100190,China

University of Chinese Academy of Sciences,Beijing 100049,China

Collaborative Innovation Center of Quantum Matter,Beijing 100871,China

Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing 100871,China

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National Key R&D Program of ChinaNew Cornerstone science Foundation through the New Cornerstone Investigator ProgramXPLORER Prize

2021YFA1400500

2024

10.1088/1674-1056/ad7728

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(10)