首页|The dynamic surface evolution of halide perovskites induced by external energy stimulation

The dynamic surface evolution of halide perovskites induced by external energy stimulation

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Tracking the dynamic surface evolution of metal halide perovskite is crucial for understanding the corresponding fundamental principles of photoelectric properties and intrinsic instability.However,due to the volatility elements and soft lattice nature of perovskites,several important dynamic behaviors remain unclear.Here,an ultra-high vacuum(UHV)interconnection system integrated by surface-sensitive probing techniques has been developed to investigate the freshly cleaved surface ofCH3NH3PbBr3 in situ under given energy stimulation.On this basis,the detailed three-step chemical decomposition pathway of perovskites has been clarified.Meanwhile,the evolution of crystal structure from cubic phase to tetragonal phase on the perovskite surface has been revealed under energy stimulation.Accompanied by chemical composition and crystal structure evolution,electronic structure changes including energy level position,hole effective mass,and Rashba splitting have also been accurately determined.These findings provide a clear perspective on the physical origin of optoelectronic properties and the decomposition mechanism of perovskites.

metal halide perovskiteexternal energy stimulationsurface dynamic evolutionsurface electronic structureultra-high vacuum interconnection system

Feiyu Cheng、Pengdong Wang、Chenzhe Xu、Qingliang Liao、Suicai Zhang、Haochun Sun、Wenqiang Fan、Guodong Liu、Zhiyun Li、Yaping Kong、Li Wang、Fangsen Li、Zhuo Kang、Yue Zhang

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Academy for Advanced Interdisciplinary Science and Technology,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China

Beijing Key Laboratory for Advanced Energy Materials and Technologies,Key Laboratory of Advanced Materials and Devices for Post-Moore Chips,Ministry of Education,Beijing Advanced Innovation Center for Materials Genome Engineering,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 10

Vacuum Interconnected Nanotech Workstation(Nano-X),Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China

Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

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technical support for Nano-X from Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(SINANO)国家自然科学基金国家重点研发计划国家重点研发计划Overseas Expertise Introduction Projects for Discipline Innovation国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金State Key Laboratory for Advanced Metals and MaterialsState Key Laboratory for Advanced Metals and Materials中央高校基本科研业务费专项中央高校基本科研业务费专项中央高校基本科研业务费专项

521222082018YFA07035032021YFA1200196B1400352188101520720315199134051991342517020142018Z-032019Z-04QNXM20210013FRF-TP-2021-03C1FRF-TP-20-008A3

2024

10.1093/nsr/nwae042

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ISSN：
年,卷(期)：2024.11(4)
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