High-efficiency red electroluminescent device based on multishelled InP quantum dots
- Authors
- Jo, Jung-Ho; Kim, Jong-Hoon; Lee, Ki-Heon; Han, Chang-Yeol; Jang, Eun-Pyo; Do, Young Rag; Yang, Heesun
- Issue Date
- 1-Sep-2016
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS LETTERS, v.41, no.17, pp.3984 - 3987
- Journal Title
- OPTICS LETTERS
- Volume
- 41
- Number
- 17
- Start Page
- 3984
- End Page
- 3987
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/7420
- DOI
- 10.1364/OL.41.003984
- ISSN
- 0146-9592
- Abstract
- We report on the synthesis of highly fluorescent red-emitting InP quantum dots (QDs) and their application to the fabrication of a high-efficiency QD-light-emitting diode (QLED). The core/shell heterostructure of the QDs is elaborately tailored toward a multishelled structure with a composition-gradient ZnSeS intermediate shell and an outer ZnS shell. Using the resulting InP/ZnSeS/ZnS QDs as an emitting layer, all-solution-processible red InP QLEDs are fabricated with a hybrid multilayered device structure having an organic hole transport layer (HTL) and an inorganic ZnO nanoparticle electron transport layer. Two HTLs of poly(9-vinlycarbazole) or poly[(9, 9-dioctylfluorenyl-2; 7-diyl)-co-(4,4'-(N-(4-sec-butylphenyl)) diphenyl-amine), whose hole mobilities are different by at least three orders of magnitude, are individually applied for QLED fabrication and such HTL-dependent device performances are compared. Our best red device displays exceptional figures of merit such as a maximum luminance of 2849 cd/m(2), a current efficiency of 4.2 cd/A, and an external quantum efficiency of 2.5%. (C) 2016 Optical Society of America
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Materials Science and Engineering > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/7420)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.