120th General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Exhibition Hall 2+3
Time 10월 20일 (금요일) 13:00~14:30
Code POLY.P-4
Subject Room-Temperature Synthesis of Widely Tunable Formamidinium Lead Halide Perovskite Nanocrystals: A New Candidate for Optoelectronic Devices
Authors DUONG NGUYEN MINH, Youngjong Kang*
Department of Chemistry, Hanyang University, Korea
Abstract Colloidal perovskites nanocrystals based on formamidinium lead halide (FAPbX3) have been synthesized by ligand assisted reprecipitation method using PbX2-DMSO complexes as precursors at room temperature. Well-defined cubic-shaped FAPbX3 nanocrystals have been obtained with a size of d = ~10 nm. The synthesized FAPbX3 nanocrystals show bright photoluminescence with a high photoluminescence quantum yield (PLQY for FAPbBr3 = 75%). The lifetimes of FAPbBr3 nanocrystals were measured for the samples isolated at several different centrifugal speeds. The photoluminescence is able to be tuned from blue to near infrared region (λpeak = 408–784 nm) either by changing the amount of oleylamine or the composition of X. The color expression range is 135% of NTSC standard. The band width of the photoluminescence spectra of FAPbX3 nanocrystals is narrow (FWHM = 18–48 nm). FAPbX3 nanocrystals show better thermal stability than MAPbBr3 nanocrystals.
E-mail minhduong92@gmail.com