Brightening thiocyanate-anion layered perovskite through internal stress modulated nano phase segregation  

作　　者：Yiming Li Jiangjian Shi Huijue Wu Yanhong Luo Dongmei Li Qingbo Meng 

机构地区：[1]Key Laboratory for Renewable Energy,Chinese Academy of Sciences,Beijing Key Laboratory for New Energy Materials and Devices,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Huairou Division,Institute of Physics,Chinese Academy of Sciences,Beijing 101400,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Nano Research》2023年第4期5533-5540,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52102332,11874402,51872321,52172260,52072402,and 51627803);Beijing Natural Science Foundation(No.2222082);the Ministry of Science and Technology of the People’s Republic of China(No.2021YFB3800103)。

摘　　要：Thiocyanate-anion(SCN−)two-dimensional(2D)layered perovskite with internal stress-controlled nano phase segregation has been firstly demonstrated as a promising material system for luminescence applications.An interesting energy band structure is found as well as charge transfer process caused by nano phase segregation,which provide an alternative route to overcome the indirect-bandgap luminescence limit of SCN layered perovskites.It is revealed that,within the SCN layered framework,the segregated nano phases exist in a quantum well form,possessing much higher carrier localization and second-order radiative recombination abilities.With the help of internal stress modulation,these advantages can be significantly enhanced and finally contribute to high luminescence performances in visible-red regions.This work provides more potential opportunities for 2D layered perovskite materials in the future optoelectronic applications.

关 键 词：two-dimensional perovskite internal stress thiocyanate anion phase segregation LUMINESCENCE 

分 类 号：O61[理学—无机化学]