Two-dimensional (2D) Ruddlesden-Popper (RP) hybrid perovskite semiconductors have received extensive attention from researchers in the field for their excellent stability and optoelectronic properties. Zhang Xu, Ph.D. student of Dalian Institute of Chemical Physics, Chinese Academy of Sciences under the guidance of researcher Liu Shengzhong of the Thin Film Silicon Solar Cell Research Group (DNL1606) and Professor Zhao Kui of the Shaanxi Normal University, made new progress in the study of crystallization kinetics of two-dimensional perovskite. Related research results were published in Advanced Materials.
This research uses high-energy synchrotron radiation technology to track the phase transition behavior in the process of real-time tracking of the solution of two-dimensional perovskite precursors to form a solid-state thin film. The substrate temperature and solvent properties are studied for two-dimensional perovskite crystallization kinetics, thin films. Phase purity, quantum well alignment, and photovoltaic performance effects. The researchers found that the orderliness of the phase purity and crystal orientation of the two-dimensional perovskite decreased, mainly due to the increase in the nucleation energy barrier of the perovskite when the former â€œdriver-solventâ€ intermediate state was formed. Therefore, the nucleation and growth of the two-dimensional perovskite by the substrate is the key to the formation of high quality perovskite films. Researchers through the basal-induced crystallization, inhibit the formation of the former "driver-solvent" intermediate states, prompting the two-dimensional quantum well vertical orientation, making it more thermodynamically stable, and further improve the purity of the crystal phase. Since the high-quality perovskite film can greatly improve the photoelectric conversion efficiency of solar cells, this study provides a theoretical basis for the preparation of high-quality low-dimensional perovskite films and high-performance optoelectronic devices, which will help promote perovskite solar cells. Further to commercial applications.
The above research work was supported by the National Key R&D Program, the National Natural Science Foundation, the Central University Fund, the Ministry of Education's â€œ111 Introduction Programâ€, the â€œThousand People Projectâ€ project, and Cornell University's high-energy synchrotron radiation source.
Bismuth is the impurity which is the most difficult to remove during fire refining of crude lead. lead fire process refined debismuthizing agent is prepared and produced by Luanchuan Hengkai Metallurgical Materials Sales Co., Ltd after research and development for many years. The lead fire smelting novel copper removing agent is prepared and produced by our company. After the copper removing agent produced by our company is used, the copper content in the lead after copper removal is within 0.0002. More importantly, after the copper removing agent produced by our company is used, no pollution is produced (no smoke), the emission of sulfur dioxide is reduced, there is no low-altitude pollution, the operation is simple for workers, the operating environment is improved, and free technical guidance is given for the first-time use.
(In addition, our company is specialized in the production of `Hengkai Metallurgical" Brand - Ferro sulphur series for foundry, copper removal agent series for lead smelting, debismuthizing agent for lead smelting, iron sulphide series for resin grinding wheel abrasive industry, iron sulphide series for brake pad friction industry, iron sulphide series for heavy metal wastewater treatment, iron disulphide series for soil improvement, iron disulphide for lithium battery anode, alloy sand series for wear-resisting flooring industry, ferrous sulphide powder series for ferrous sulphide cored wire, ferrous sulphide for ferrous sulphide cored wire, iron sulphide for resin grinding wheel, ferrous sulphide powder for heavy metal wastewater treatment, ferrous sulphide powder for soil improvement, ferrous sulphide cored wire, pyrite, ferrous sulphide ore, molybdenum oxide, high purity molybdenum trioxide, ammonium molybdate, titanium dioxide, cryolite powder, mullite, etc.)
Debismuthizing agent lead debismuthizing agent debismuthizing agent refined by lead fire lead-refined debismuthizing agent and lead debismuthizing agent for export
LUOYANG PERFECT TRADING CO.LTD, , https://www.pyritefes.com