Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites

作     者：MINGHUAN CUI CHAOCHAO QIN YUANZHI JIANG SHICHEN ZHANG CHANGJIU SUN MINGJIAN YUAN YONGGANG YANG YUFANG LIU MINGHUAN CUI;CHAOCHAO QIN;YUANZHI JIANG;SHICHEN ZHANG;CHANGJIU SUN;MINGJIAN YUAN;YONGGANG YANG;YUFANG LIU

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.