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

作　　者：Yuqing Huang Chaoyu Guo Lei Gao Wenna Du Haotian Zheng Da Wu Zhengpu Zhao Chu-Wei Zhang Qin Wang Xin-Feng Liu Qingfeng Yan Ying Jiang 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(International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China;Collaborative Innovation Center of Quantum Matter,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;Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials,Peking University,Beijing 100871,China)

机构地区：[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

出　　处：《Chinese Physics B》2024年第10期116-119,共4页中国物理B（英文版）

基　　金：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.

摘　　要：The next-generation hot-carrier solar cells,which can overcome the Shockley-Queisser limit by harvesting excessenergy from hot carriers,are receiving increasing attention.Lead halide perovskite(LHP)materials are considered aspromising candidates due to their exceptional photovoltaic properties,good stability and low cost.The cooling rate of hotcarriers is a key parameter influencing the performance of hot-carrier solar cells.In this work,we successfully detected hotcarrier dynamics in operando LHP devices using the two-pulse photovoltage correlation technique.To enhance the signalto-noise ratio,we applied the delay-time modulation method instead of the traditional power modulation.This advancementallowed 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 differentphonon contributions.These results provide us new insights into the optimal design of hot-carrier solar cells and highlightthe potential of LHP materials in advancing solar cell technology.

关 键 词：two-pulse correlation spectroscopy lead halide perovskites hot carrier cooling ultrafast dynamics 

分 类 号：TM914.4[电气工程—电力电子与电力传动]