Adv. mater.: Liu Shengzhong, researcher of Dalian Institute of chemical engineering, Chinese Academy of Sciences, and Yang Zhou, associate professor of Shaanxi Normal University have made new progress in the research of perovskite single crystal digital image sensor

Recently, Liu Shengzhong, researcher of thin film silicon solar cell research group (dnl1606) of Dalian Institute of chemistry, Chinese Academy of Sciences, and Yang Zhou, associate professor of Shaanxi Normal University, Liu Yucheng, etc made new progress in the research of perovskite single crystal digital image sensor The relevant research results were published on advanced materials (DOI: 10.1002 / ADMA 201707314) As a super material for solar cell applications, perovskite ch 3nh 3pbx 3 (mapbx 3, x = Cl, Br, I) also shows an important application prospect in the field of optoelectronics Compared with polycrystalline films, perovskite single crystals have better photoelectric properties Through fine-tuning the nucleation and growth process of the crystal, the team first developed a low-temperature gradient crystallization method (ltgc) to grow high-quality perovskite ch 3nh 3 pbbr 3 single crystal, obtaining ultra-low defect density of state, greatly improving carrier mobility and carrier migration life In addition, the researchers have successfully fabricated a large area (~ 1300 mm 2) imaging module composed of 729 pixel sensor array by using high-quality single crystal design The device has very fast response speed, excellent light response, high-resolution imaging function, and good stability It is the first high-performance digital image sensor based on large-scale single crystal perovskite, which provides a new idea for the design and development of new photoelectric devices using perovskite single crystal materials The above research work was supported by China's national key research and development plan, the Central University Foundation Research Fund, the National Natural Science Foundation project, 111 projects, the National University Research Fund, the Yangtze River scholars innovation team, and the China's national thousand talents program.