Effect of triplet multiple quantum well structures on the performance ofblue phosphorescent organic light-emitting diodes

Collection with item attached
2012
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/477810.do
DOI
10.1186/1556-276X-7-23
Title
Effect of triplet multiple quantum well structures on the performance ofblue phosphorescent organic light-emitting diodes
Description
This work was supported by the ERC program of the Korea Science andEngineering Foundation (KOSEF) grant funded by the Korea Ministry ofEducation, Science and Technology (MEST; no. 20100009882).
abstract
We investigate multiple quantum well [MQW] structures with charge control layers [CCLs] to produce highly efficient blue phosphorescent organic light-emitting diodes [PHOLEDs]. Four types of devices from one to four quantum wells are fabricated following the number of CCLs which are mixed p-and n-type materials, maintaining the thickness of the emitting layer [EML]. Remarkably, such PHOLED with an optimized triplet MQW structure achieves maximum luminous and external quantum efficiency values of 19.95 cd/A and 10.05%, respectively. We attribute this improvement to the efficient triplet exciton confinement effect and the suppression of triplet-triplet annihilation which occurs within each EML. It also shows a reduction in the turn-on voltage from 3.5 V ( reference device) to 2.5 V by the bipolar property of the CCLs.
provenance
Made available in Cube on 2018-09-28T12:16:04Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Seokjae
Koo, Jaryong
Hyung, Gunwoo
Lim, Donghwan
Lee, Donghyung
Lee, Kumhee
Yoon, Seungsoo
Kim, Wooyoung
Kim, Youngkwan
accessioned
2018-09-28T12:16:04Z
available
2018-09-28T12:16:04Z
issued
2012
citation
NANOSCALE RESEARCH LETTERS(7)
issn
1931-7573
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/477810.do
Funder
교육과학기술부
Funding Program
2단계연구중심대학육성(0.5)
Project ID
1345196968
Jurisdiction
Rep.of Korea
Project Name
Material Research Group for Advanced Information Display
rights
openAccess
type
article


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