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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Room-Temperature Synthesis of Widely Tunable Formamidinium Lead Halide Perovskite Nanocrystals: A New Candidate for Optoelectronic Devices

등록일
2017년 8월 22일 09시 57분 30초
접수번호
0770
발표코드
POLY.P-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 20일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
Polymer Chemistry
저자 및
공동저자
DUONG NGUYEN MINH, Youngjong Kang*
Department of Chemistry, Hanyang University, Korea
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.

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