In recent years, lead-based halogen perovskite single crystals exhibit excellent optical and electrical properties due to their high absorption coefficient, long carrier migration distance, and high carrier mobility. However, the lead toxicity of lead-based perovskite materials seriously restricts its development. The development of non-lead perovskite crystalline materials and the assembly of optoelectronic functional devices has become a research hotspot in related fields.
The research team led by Luo Junhua, a researcher of the inorganic key optoelectronic functional crystal material in the State Key Laboratory of Structural Chemistry at the Institute of Structural Physics of the Chinese Academy of Sciences, successfully produced a lead-free high-quality single crystal. The perovskite single crystal material has a wide light absorption range, a low density of defect states, and a high carrier mobility; a planar array photodetector prepared using the single crystal material exhibits good detection performance. Optical radiation to the intrinsic absorption region of the crystal can achieve high sensitivity and rapid detection. As a potential hybrid semiconductor material, it will further expand the application range of non-lead inorganic/organic hybrid perovskite materials in solar cells and photoelectric detection. The relevant research results are published in Advanced Functional Materials. Previously, the team has made a series of advances in related molecular-based phase transitions and structural design, performance control, and research of photovoltaic devices for ferroelectric compounds.
The research work was supported by the National Outstanding Youth Fund, the Chinese Academy of Sciences’ Strategic Pioneering Science and Technology Research Project and the “100 People†Research Fellow of the Haixi Research Institute of the Chinese Academy of Sciences, led by the National Natural Science Foundation of China’s Outstanding Youth Fund and the Haixi Research Institute of the Chinese Academy of Sciences “Spring Miao Talent†special projects. Funding from the Fujian Outstanding Youth Fund.
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