Solution-processed all-inorganic lead halide perovskite/layered double hydroxides superlattices  

作　　者：Deyu Li Mingming Zhang Lulu Wei Shubing Tian Mingze Sun Kang Liu Jixiang Xu Lei Wang Jun Xing 

机构地区：[1]Key Laboratory of Eco-chemical Engineering,Ministry of Education,College of Chemistry and Molecular Engineering,Qingdao University of Science&Technology,Qingdao 266042,China [2]College of Sino-German Science and Technology,Qingdao University of Science&Technology,Qingdao 266042,China

出　　处：《Science China Chemistry》2024年第9期2904-2910,共7页中国科学（化学英文版）

基　　金：supported by the Natural Science Foundation of Qingdao,China(23-2-1-245-zyyd-jch);the Taishan Scholars Program;the National Natural Science Foundation of China(52171140)。

摘　　要：Quantum wells and superlattices are key building blocks in the semiconductor industry,normally fabricated using epitaxial growth techniques,such as vapor phase epitaxy,metalorganic chemical vapor deposition and molecular beam epitaxy.However,these complicated preparation processes,as well as their high cost,limit their extensive applications.It is essential to develop a simple solution process for building superstructures.Here,we demonstrate an ion exchange strategy for synthesizing an allinorganic superlattice cesium lead bromide/layered double hydroxides(CsPbBr_3/LDH)in solution.At room temperature,the perovskite ions diffuse into the interlayer of LDH and assemble into layered perovskite with various thicknesses.Compared with traditional organic-inorganic hybrid perovskite superlattice,the all-inorganic perovskite superlattice CsPbBr_(3)/LDH has weak quantum confinement,which exhibits narrow emission line-widths of 20 nm,high quantum yields of 55%,and radiative lifetimes of several ns.Our findings offer a new route to synthesize novel perovskite superlattices and enrich the perovskite supercrystal platform for electronics,photonics and optoelectronics devices.

关 键 词：halide perovskite SUPERLATTICE layered double hydroxides 2D 

分 类 号：TB34[一般工业技术—材料科学与工程]