Pressure-Induced Emission in Layered Indium Double Perovskites by Synergistically Manipulating Exciton Excitation and Recombination Dynamics

Open AccessCCS ChemistryRESEARCH ARTICLES20 Oct 2024Pressure-Induced Emission in Layered Indium Double Perovskites by Synergistically Manipulating Exciton Excitation and Recombination Dynamics Long Zhang, Lin Xiong, Huaiyang Sun, Yuanyuan Fang, Kai Wang, Hong Jiang, Laizhi Sui, Kaijun Yuan, Guorong Wu, Yonggang Wang and Bo Zou Long Zhang , Lin Xiong , Huaiyang Sun , Yuanyuan Fang , Kai Wang , Hong Jiang , Laizhi Sui , Kaijun Yuan , Guorong Wu , Yonggang Wang and Bo Zou https://doi.org/10.31635/ccschem.024.202404878 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail The soft and anharmonic lattice with strong electron-phonon interaction in two-dimensional (2D) layered double perovskites brings about intrinsic excitonic effects and enormous advantages in designing solid-state white-light emitters. Reconfiguring the carrier dynamics and excited-state self-trapped exciton behaviors to modulate the light emission properties in 2D indium double perovskites has long been unexplored yet is challenging. Herein, employing a brominated organic linker-incorporated 2D indium double perovskite (Br-PA)4AgInBr8 (Br-PA = 3-bromopropylammonium) as a representative model system, we achieved a strong single-ensemble white-light emission with long carrier lifetimes (μs scale) by pressure-driven STEs transition from dark to bright states. The PL decay at all emission wavelengths is identical without wavelengthdependence, indicating a time-averaged single ensemble luminescence dynamic that is rare in halide perovskites. Pressure-induced luminescence properties of 2D Ag-In double perovskites are far superior to their bismuth counterparts, mainly due to the eliminated intersection between ground- and excited-state curves, large transition dipole moment, intermediate electron-phonon coupling strength, and high defect tolerance. These results not only reveal pressure and composition effects on fluorescence properties and carrier dynamics processes of 2D double perovskites, but also demonstrate layered indium double perovskites as promising candidates for artificial indoor illumination, pressure sensing, anti-counterfeiting, and information storage applications. Download figure Download PowerPoint Previous articleNext article FiguresReferencesRelatedDetails Issue AssignmentNot Yet AssignedSupporting Information Copyright & Permissions© 2024 Chinese Chemical Society Downloaded 0 times PDF downloadLoading ...