Nonequilibrium Lattice Dynamics in Photoexcited 2D Perovskites

Shelby A. Cuthriell; Shobhana Panuganti; Craig C. LaingMichael A. QuinteroBurak GuzelturkNuri YazdaniBoubacar TraoreAlexandra BrumbergChristos D. MalliakasAaron M. LindenbergVanessa WoodClaudine KatanJacky EvenXiaoyi ZhangMercouri G. KanatzidisRichard D. Schaller

首页> 外文期刊>Advanced Materials >Nonequilibrium Lattice Dynamics in Photoexcited 2D Perovskites

【24h】

Nonequilibrium Lattice Dynamics in Photoexcited 2D Perovskites

机译：Nonequilibrium Lattice Dynamics in Photoexcited 2D Perovskites

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Interplay between structural and photophysical properties of metal halide perovskites is critical to their utility in optoelectronics, but there is limited understanding of lattice response upon photoexcitation. Here, 2D perovskites butylammonium lead iodide, (BA)_2PbI_4, and phenethylammonium lead iodide, (PEA)_2PbI_4, are investigated using ultrafast transient X-ray diffraction as a function of optical excitation fluence to discern structural dynamics. Both powder X-ray diffraction and time-resolved photoluminescence linewidths narrow over 1 ns following optical excitation for the fluence range studied, concurrent with slight redshifting of the optical bandgaps. These observations are attributed to transient relaxation and ordering of distorted lead iodide octahedra stimulated mainly by electron–hole pair creation. The c axis expands up to 0.37% over hundreds of picoseconds; reflections sampling the a and b axes undergo one tenth of this expansion with the same timescale. Post-photoexcitation appearance of the (110) reflection in (BA)_2PbI4 would suggest a transient phase transition, however, through new single-crystal XRD, reflections are found that violate glide plane conditions in the reported Pbca structure. The static structure space group is reassigned as P2_12_12_1. With this, a nonequilibrium phase transition is ruled out. These findings offer increased understanding of remarkable lattice response in 2D perovskites upon excitation.

著录项

来源
《Advanced Materials》 |2022年第44期|2202709.1-2202709.9|共9页
作者
Shelby A. Cuthriell; Shobhana Panuganti; Craig C. LaingMichael A. QuinteroBurak GuzelturkNuri YazdaniBoubacar TraoreAlexandra BrumbergChristos D. MalliakasAaron M. LindenbergVanessa WoodClaudine KatanJacky EvenXiaoyi ZhangMercouri G. KanatzidisRichard D. Schaller;
展开▼
作者单位

Stanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park, CA 94025, USA,Department of Materials Science and Engineering Stanford University Stanford, CA 94305, USA;

Department of Information Technology and Electrical Engineering ETH Zurich Zurich 8092, Switzerland;

Univ Rennes ENSCR INSA Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, Rennes F–35000, FranceUniv Rennes INSA Rennes CNRS Institut FOTON – UMR 6082, Rennes F–35000, FranceX-Ray Science Division Argonne National Laboratory Lemont, IL 60439, USADepartment of Chemistry Northwestern University 2145 N. Sheridan Road, Evanston, IL 60208, USADepartment of Chemistry Northwestern University 2145 N. Sheridan Road, Evanston, IL 60208, USA,Center for Nanoscale Materials Argonne National Laboratory Lemont, IL 60439, USAStanford Institute for Materials and Energy Sciences SLAC National Accelerator Laboratory Menlo Park, CA 94025, USA,Department of Information Technology and Electrical Engineering ETH Zurich Zurich 8092, Switzerland;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
lead halide perovskites; optical excitation; transient structures;

Nonequilibrium Lattice Dynamics in Photoexcited 2D Perovskites

摘要

著录项

相关主题

期刊订阅