Recently, Liu Shengzhong, a researcher of the thin-film silicon solar cell research group of the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Yang Zhou, an associate professor of Shaanxi Normal University, and Dr. Liu Yucheng, have made new progress in the research of perovskite single crystal digital image sensors. Published on Advanced Materials.
As a super material for solar cell applications, perovskite CH 3 NH 3 PbX 3 (MAPbX 3 , X=Cl, Br, I) also shows important application prospects in the field of optoelectronics. Compared to polycrystalline films, perovskite single crystals have better optoelectronic properties. By fine-tuning the crystal nucleation and growth process, the team first developed a low temperature gradient crystallization method (LTGC) to grow high quality perovskite CH 3 NH 3 PbBr 3 single crystals, achieving ultra-low defect density. Increased carrier mobility and carrier migration lifetime. In addition, researchers have successfully fabricated large-area (≈1300mm 2 ) imaging assemblies consisting of 729 pixel sensor arrays using high-quality single crystal designs. The device has very fast response speed, excellent optical responsivity, high-resolution imaging function, and good stability. It is the first high-performance digital image sensor based on large-size single crystal perovskite. It provides a new idea for the design and development of new optoelectronic devices using perovskite single crystal materials.
The above research work was funded by China's National Key Research and Development Program, the Central University Fundamental Research Fund, the National Natural Science Foundation Project, the 111 Project, the National University Research Fund, the Yangtze Scholar Innovation Team, and the China National Thousand Talents Program.
Article link: https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201707314
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