题目： | diffusion-mediated synthesis of high-quality organic–inorganic hybrid perovskite nanocrystals |
作者： | xiang sun, lin yuan, yang liu, guozheng shi, yumin wang, chunmeng liu, xuliang zhang, yaxin zhao, chenyu zhao, mengmeng ma, boyuan shen, yaxing wang, qing shen, zeke liu* & wanli ma* |
单位： | 1institute of functional nano & soft materials (funsom), jiangsu key laboratory for carbon-based functional materials and devices, joint international research laboratory of carbon-based functional materials and devices, soochow university, suzhou, china. 2faculty of informatics and engineering, the university of electro-communications, tokyo, japan 3state key laboratory of radiation medicine and protection, school for radiological and interdisciplinary science (rad-x) and collaborative innovation center of radiation medicine of jiangsu higher education institutions, soochow university, suzhou, china. 4the college of electronics and information engineering, tongji university, shanghai, china. 5jiangsu key laboratory of advanced negative carbon technologies, soochow university, suzhou, china. |
摘要： | organic–inorganic hybrid perovskite nanocrystals (pncs) (apbx3, a=formamidinium, methylammonium, x=cl, br, i) are semiconductor materials with important implications for fundamental research and optoelectronic applications. however, the development of hybrid pncs lags behind their all-inorganic counterparts (cspbx3), primarily due to their fast growth time (tens of seconds) caused by the uncontrollable kinetics of their synthesis. here we present a diffusion-mediated synthesis approach by selecting lead precursors with desired solubility in the reaction solvent. pb(scn)2, which has limited solubility, serves as a lead reservoir, providing a continuous source of lead throughout the reaction process. this strategy significantly slows down the reaction kinetics. the synthesis time for hybrid pncs can be drastically prolonged to 180min, while maintaining the size-focusing stage. as a result, the diffusion-mediated kinetics enables the scalable synthesis of high-quality hybrid pncs with high monodispersity and near-unity photoluminescence quantum yield. the high-quality hybrid pncs obtained by this method will stimulate explorations into their properties and drive the development of efficient optoelectronic devices. |
影响因子： | 17.5 |
分区情况： | 一区 |
链接： | 责任编辑：杜欣 |
