Preparation of a photo-degradation-resistant quantum dot-polymer composite plate for use in the fabrication of a high-stability white-light-emitting diode
- Authors
- Jang, Eun-Pyo; Song, Woo-Seuk; Lee, Ki-Heon; Yang, Heesun
- Issue Date
- 1-Feb-2013
- Publisher
- IOP PUBLISHING LTD
- Citation
- NANOTECHNOLOGY, v.24, no.4
- Journal Title
- NANOTECHNOLOGY
- Volume
- 24
- Number
- 4
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/17181
- DOI
- 10.1088/0957-4484/24/4/045607
- ISSN
- 0957-4484
- Abstract
- We report on the synthesis of highly fluorescent double-ZnS-shell-capped, yellow-emitting Cu-In-S quantum dots (QDs) with a surprisingly high quantum yield of 92%, the preparation of a free-standing QD-polymethylmethacrylate composite plate, and the application of the QD plate in the fabrication of QD-based white-light-emitting diodes (WLEDs). A free-standing QD plate with QDs embedded uniformly inside a polymeric matrix is used to fabricate a remote-type, resin-free WLED. The QD plate-based WLED displays a high luminous efficiency; however, it suffers from a significantly unstable device performance due to QD degradation upon prolonged photo-excitation. An exceptional operational stability of the QD plate-based WLED is realized by generating hybrid double layers of an organic adhesion layer and a gas barrier layer of sol-gel-derived silica, rendering the QD plate impermeable to oxygen. Our success in achieving a color converter robust against photo-degradation and applying it in the fabrication of a reliable QD-based LED is greatly encouraging as regards the development of next-generation QD-based LED lighting sources. Online supplementary data available from stacks.iop.org/Nano/24/045607/mmedia
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Collections - Graduate School > Materials Science and Engineering > 1. Journal Articles
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