Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites
作者机构:Henan Key Laboratory of Infrared Materials&Spectrum Measures and ApplicationsHenan Normal UniversityXinxiang 453007China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China Institute of PhysicsHenan Academy of SciencesZhengzhou 450046China
出 版 物:《Photonics Research》 (光子学研究(英文版))
年 卷 期:2024年第12卷第3期
页 面:563-570页
核心收录:
学科分类:08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0702[理学-物理学]
基 金:National Natural Science Foundation of China(12347158,11804084,12074104,61627818,U1804261) Natural Science Foundation of Henan Province(222300420057) Young Backbone Teacher Training Program in Higher Education of Henan Province(2019GGJS065)
主 题:dielectric perovskite quasi
摘 要:The dielectric confinement effect plays an essential role in optoelectronic *** studies on the relationship between the dielectric confinement and the photoelectric properties are ***,three organic spacers with different dielectric constants are employed to tune the exciton dynamics of quasi-two-dimensional(quasi-2D)Ruddlesden–Popper perovskite *** transient absorption spectroscopy reveals that the small dielectric constant ligand enables a weak dynamic disorder and a large modulation depth of the coherent phonons,resulting in a more complete energy transfer and the inhibition of a trap-mediated nonradiative ***,the increase in the bulk-ligand dielectric constant reduces the corresponding exciton binding energy and then suppresses the Auger recombination,which is beneficial for high-luminance lightemitting *** work emphasizes the importance of dielectric confinement for regulating the exciton dynamics of layered perovskites.