文献类型：期刊文献

英文题名：Temperature-dependent nonmonotonous evolution of excitonic blue luminescence and Stokes shift in chlorine-based organometallic halide perovskite film

作者：Jiang, Beng[1];Li, Yue[1];Zhu, Jiabin[1];Hu, Ziting[1];Zhou, Xuemeng[1];Zhang, Yan[1];Gao, Ming[1];Wang, Wenzhen[2];Jiang, Zuimin[3,4];Ma, Zhongquan[1];Zhao, Lei[1];Chen, Teng[5];Xu, Zhan[2];Xu, Haitao[6];Xu, Fei[1,3,4];Xu, Run[2];Hong, Feng[1]

机构：[1]Shanghai Univ, Coll Sci, Dept Phys, SHU SolarE R&D Lab,Shanghai Key Lab High Temp Sup, Shanghai 200444, Peoples R China;[2]Shanghai Univ, Sch Mat Sci & Engn, Dept Elect Informat Mat, Shanghai 200444, Peoples R China;[3]Fudan Univ, State Key Lab Surface Phys, Minist Educ, Shanghai 200433, Peoples R China;[4]Fudan Univ, Dept Phys, Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China;[5]Shanghai Univ, Sch Mech & Engn Sci, Shanghai Inst Appl Math & Mech, Shanghai Key Lab Mech Energy Engn, Shanghai 200444, Peoples R China;[6]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2020

卷号：116

期号：7

外文期刊名：APPLIED PHYSICS LETTERS

收录：SCI-EXPANDED(收录号：WOS:000519601800004)、、EI(收录号：20200908233350)、Scopus(收录号：2-s2.0-85081086255)、WOS

基金：This work was supported by the Natural Science Foundation of Shanghai (No. 17ZR1409600), the State Key Laboratory of Surface Physics of Fudan University (No. KF2018_15), and the National Natural Science Foundation of China (Grant Nos. 61874027, 11527805, and 61874070). The authors are grateful to the Instrumental Analysis and Research Center of Shanghai University for the XPS measurement. The authors are grateful to Dr. Ye Yuan for the first-principles calculations from the Key Laboratory of Polar Materials and Devices at the East China Normal University.

语种：英文

外文关键词：Binding energy - Energy gap - Excitons - Luminescence - Organometallics - Perovskite - Semiconductor quantum wells - Temperature

外文摘要：The chlorine-based organometallic halide perovskite (Cl-OHP) film with a (001)-preferred orientation and good crystallization has been synthesized by a hybrid sequential deposition process. The photoluminescence and absorption spectra of the Cl-OHP film in the blue light region have been investigated at operating temperatures ranging from 10 to 350K. The Cl-OHP film shows a strong exciton-related emission of which the exciton binding energies at low temperature and high temperature are 136meV and 41meV, respectively. It is found that the blueshift from excitonic luminescence is initially observed at temperature below 175K, and then, the redshift occurs from 175 to 350K. Meanwhile, the bandgap of the Cl-OHP film widens with the increase in operating temperature. The nonmonotonous shifts on the emission peak energy are attributed to the competition between the Stokes effect and bandgap widening. This should contribute to the understanding of photophysical processes in Cl-OHP materials and devices. Published under license by AIP Publishing.