Superior
Efficiency and Low-Efficiency Roll-Off White
Organic Light-Emitting Diodes Based on Multiple Exciplexes as Hosts
Matched to Phosphor Emitters
Posted on 2019-08-16 - 15:43
Based on exciplexes
as hosts, the monochromatic organic light-emitting
diodes (OLEDs) have achieved high power and external quantum efficiencies.
However, the high-quality white OLEDs (WOLEDs) with high color rendering
index (CRI) have the unsatisfactory efficiencies at high luminance,
particularly in terms of power efficiency (PE), resulting in high
energy consumption. Here, a new design concept using multiple exciplexes
as hosts to match different phosphors has been demonstrated to develop
high-performance WOLEDs. It can be seen that the resulting WOLEDs
work at a low turn-on voltage of 2.3 V and exhibit the large forward-viewing
PE and external quantum efficiency (EQE) of 79 lm W–1 and 22.5%, respectively, without light out-coupling techniques.
Significantly, the PE and EQE still remain 48.0 lm W–1 and 21.4% at 1000 cd m–2, showing extremely low
efficiency roll-off. The CRI is as high as 81. The keys to success
are the selection of the different exciplex hosts matched to different
phosphors and the reasonable arrangement of emissive layers, which
are beneficial to regulate the exciton distribution and reduce the
energy losses.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Ying, Shian; Pang, Peiyuan; Zhang, Shuai; Sun, Qian; Dai, Yanfeng; Qiao, Xianfeng; et al. (2019). Superior
Efficiency and Low-Efficiency Roll-Off White
Organic Light-Emitting Diodes Based on Multiple Exciplexes as Hosts
Matched to Phosphor Emitters. ACS Publications. Collection. https://doi.org/10.1021/acsami.9b09429
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
AUTHORS (9)
SY
Shian Ying
PP
Peiyuan Pang
SZ
Shuai Zhang
QS
Qian Sun
YD
Yanfeng Dai
XQ
Xianfeng Qiao
DY
Dezhi Yang
JC
Jiangshan Chen
DM
Dongge Ma
KEYWORDS
2.3 Vexciplexeenergy consumptionWOLEDs workemissive layersEQEforward-viewing PEefficiency roll-offCRIHosts Matchedexciton distributionlight-emitting diodesLow-Efficiency Roll-Off White Organic Light-Emitting Diodeslmpower efficiencyMultiple Exciplexesenergy lossesquantum efficiencyPhosphor Emittersdesign conceptphosphorexciplex hoststurn-on voltageSuperior Efficiencylight out-coupling techniquesquantum efficiencies