121st General Meeting of the KCS

Type Poster Presentation
Area Physical Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code PHYS.P-137
Subject Structural Dynamics of Bismuth Iodide Complex Probed by Time-Resolved X-ray Solution Scattering
Authors Eun Hyuk Choi, Doo-Sik Ahn1, Sungjun Park, Hyotcherl Ihee*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
1Center for Nanomaterials and Chemical Reactions, Institute for Basic Science, Korea
Abstract Recently, bismuth based halide compounds have come into the spotlight as potential materials for perovskite solar cell. For this reason, these compounds have been heavily studied in solid state. However, there are relatively few examples of their photo-induced chemical dynamics in solution. Here, we present light driven structural dynamics of bismuth triiodide complex (BiI3) by using time-resolved X-ray solution scattering and quantum chemical calculations. Briefly, upon 400 nm excitation, BiI3 undergoes LMCT transition and within our time resolution (~100 ps) it transforms into iso-BiI2-I rather than planar trigonal (D3h) structure. The presence of this specific intermediate structure is further supported by quantum chemical calculations.
E-mail horang2.eh@gmail.com