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나노 구조 물리 연구단
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Investigation of Chemical Origin of White-Light Emission in Two-Dimensional (C4H9NH3)(2)PbBr4 via Infrared Nanoscopy

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Title
Investigation of Chemical Origin of White-Light Emission in Two-Dimensional (C4H9NH3)(2)PbBr4 via Infrared Nanoscopy
Author(s)
Dae Young Park; Sung-Jun An; Chauwoo Lee; Duc Anh Nguyen; Kang-Nyeoung Lee; Mun Seok Jeong
Publication Date
2019-12
Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.10, no.24, pp.7942 - 7948
Publisher
AMER CHEMICAL SOC
Abstract
The broadband light emission in low-dimensional organic lead halide perovskites (OHPs) is a fascinating property for white light-emitting diodes (LEDs). However, unique emission has been observed in highly distorted low-dimensional OHPs such as (110) and (111) perovskites. Herein, we report the first observation of white-light emission under ambient (21 degrees C) conditions in a rectangular microsheet of (C4H9NH3)(2)PbBr4, a (100) perovskite. The origin of white-light emission in (C4H9NH3)(2)PbBr4 was revealed as defect-assisted radiative recombination via excitation power-dependent photoluminescence measurement. Additionally, the origin of the defect was confirmed to be organic cation vacancies formed by intercalated water molecules via infrared nanoscopy. This result can help to improve the performance of white LEDs using low-dimensional OHPs. © 2019 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/6739
ISSN
1948-7185
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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