Effect of phase distribution and defect passivation on amplified spontaneous emission of quasi-2D Dion-Jacobson perovskite

作     者：Qin, Chaochao Huang, Qinxiang Zhang, Shichen Song, Jian Jiao, Zhaoyong Ma, Shuhong Zheng, Shuwen Song, Pan Wang, Haiying Zhang, Jicai Jia, Guangrui Jiang, Yuhai Zhou, Zhongpo 

作者机构：Henan Normal Univ Henan Key Lab Infrared Mat & Spectrum Measures & A Xinxiang 453007 Peoples R China Henan Normal Univ Sch Phys Xinxiang 453007 Peoples R China ShanghaiTech Univ Sch Phys Sci & Technol Shanghai 201210 Peoples R China 

出 版 物：《APPLIED PHYSICS LETTERS》 (应用物理学快报)

年 卷 期：2024年第124卷第8期

页      面：081103-081103页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China Natural Science Foundation of Henan Province National Key Research and Development Program of China [2022YFA1604302] Young Backbone Teacher Training Program in Higher Education of Henan Province [2019GGJS065] 12074104 12174090 12334011 

主　　题：Perovskite 

摘      要：Quasi-2D Dion-Jacobson (DJ) halide perovskites with large exciton binding energy, self-assembled quantum wells, and high quantum yield attract growing attention in light-emitting diodes and solar devices. DJ-layered perovskites have the eliminated van der Waals gap and show improved photophysical features. However, there are a variety of defects and complex phase distributions produced during the solution procedure and the fast crystal development. In this paper, we reveal the effect of phase distribution and defect passivation on amplified spontaneous emission of quasi-2D perovskite (PDMA)(MA)(2)Pb3Br10 thin films through solvent engineering and additive methods, by establishing the correlation between the precursor compositions and the photophysical performance of the layered DJ perovskites. The energy transfer rate and the photoluminescence quantum yield increase due to the spatially homogeneous domain distribution and the reduced defect density after the addition of KBr in the DMSO:DMF. More importantly, we realize green amplified spontaneous emission and single-mode vertical-cavity surface-emitting lasing with low thresholds of 8.8 and 10.5 mu J cm(-2), respectively. This work provides a guideline to achieve low-threshold multicolor lasers based on DJ perovskites.