κΉνν
2018-04-16T02:10:47Z
2018-04-16T02:10:47Z
2012-02
Journal of Nanoscience and Nanotechnology, 2012, 12(2), P.1649~1702
1533-4880
http://www.ingentaconnect.com/content/asp/jnn/2012/00000012/00000002/art00158
http://hdl.handle.net/20.500.11754/67440
The electrical and the optical properties of phosphorescent organic light-emitting devices (PHOLEDs) fabricated utilizing a mixed host emitting layer (EML) consisting of N,N′-dicarbazolyl-3,5-benzene (mCP) and 1,3,5-tri(phenyl-2-benzimidazole)-benzene (TPBi) were investigated to clarify the carrier transport mechanisms of PHOLEDs. While the operating voltage of the PHOLEDs with a mixed host EML significantly decreased due to the insertion of TPBi with a high electron mobility, the quantum efficiency of the PHOLEDs decreased due to the hindrance of the exciton energy transfer by TPBi molecules. The electroluminescence spectra for the PHOLEDs with an tris(2-phenylpyridine)iridium-doped mixed host EML showed that the TPBi molecules in the mixed host EML increased the electron injection into the mixed host EML, resulting in a decrease of the shift length of the recombination zone in comparison with a single host EML.
en
American Scientific Publishers
LUMINANCE EFFICIENCY ENHANCEMENT
PHOSPHORESCENT ORGANIC LIGHT-EMITTING DIODE
TRIPLET EXCITON
Carrier Transport Mechanisms of Phosphorescent Organic Light-Emitting Devices Fabricated Utilizing a N,N '-Dicarbazolyl-3,5-Benzene: 1,3,5-Tri#Phenyl-2-Benzimidazole#-Benzene Mixed Host Emitting Layer
Article
2
12
10.1166/jnn.2012.4587
1649-1653
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Dong Chul, Choo
Hyun Sung, Bang
Tae Whan, Kim
Ji Hyun, Seo
Young Kwan, Kim
2012214452
S
COLLEGE OF ENGINEERING[S]
DEPARTMENT OF ELECTRONIC ENGINEERING
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