Recently, the team led by Liu Shengzhong, a researcher of silicon-based solar cell research group of Solar Energy Research Department of Clean Energy National Laboratory of Chinese Academy of Sciences, Dalian Institute of Chemical Physics, has made new progress in the growth and application of perovskite single crystal sheet materials in cooperation with Shaanxi Normal University , The related research results published in the "Advanced Materials" (Advanced Materials DOI: 10.1002 / adma.201601995) on.
Perovskite materials are excellent photovoltaic, optoelectronic, laser and light-emitting materials because of their extremely long carrier transport distance, extremely low defect density, and high light absorption coefficient. At present, NREL certified perovskite solar cell photoelectric conversion efficiency of 22.1%, has been close to the efficiency of crystalline silicon solar cells; the same time, based on perovskite materials of various optoelectronic devices in the field of optoelectronics also has broad application prospects. However, there are many grains, grain boundaries, voids and surface defects in the microcrystalline perovskite film, which are the key problems that need to be solved to further improve the solar energy conversion efficiency and other optoelectronic devices. In the previous work, DNL1606 group successfully prepared CH3NH3PbX3 (X = Cl, Br, I) of methylamine perovskite single crystal more than two inches in size by the temperature rising crystallization method for the first time (Liu et al, Adv. Mater. : 10.1002 / adma.201502597) and a large-sized thyroxide perovskite single crystal and a photoelectric device CH (NH2) 2PbI3 (Liu et al, Adv.OpticalMater.2016, DOI: 10.1002 / adom.201600327). These large-size perovskite single crystals In research and development of high-performance optoelectronic devices showed obvious superiority.
According to the semiconductor industry for the market demand for perovskite single-wafer, the research team for the first time using the mobile solution micro-reaction system to achieve the thickness and shape control perovskite CH3NH3PbI3 single crystal sheet preparation. Compared with the microcrystalline perovskite optoelectronic device, the integrated circuit type photodetector assembled with the perovskite single crystal wafer has better light response and higher quantum efficiency, and the spectral response range is wider. At the same time, the integrated circuit photodetector also has obvious advantages in working stability.
The above research work was supported by the "Plan 111" of the Central University Fund, the Changjiang Scholars and Innovation Team, and the "Thousand-Year Plan" project.
Vertical Spray Bidet,Bidet Toilet Faucet,Bathroom Bidet Faucet,Single Hole Bidet Faucet
Kaiping City Yibiao Sanitary Ware Co., Ltd. , https://www.faucetsaoli.com