Effects of Charge Balance on the Carrier Trapping Mechanisms of Organic Light-Emitting Devices with a 5,6,11,12-Tetraphenylnaphthacene Emission Layer

The efficiency of the organic light-emitting devices (OLEDs) was enhanced with increasing thickness of a 5,6,11,12-tetraphenylnaphthacene (rubrene) emission layer (EML). The charge trapping and the luminance mechanisms were affected by the thickness of the rubrene layer, regardless of the existence...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2013-01, Vol.583 (1), p.159-169
Main Authors: Jang, Jae Seung, Park, Su Hyeong, Kim, Dae Hun, Kim, Tae Whan
Format: Article
Language:English
Subjects:
68. 37. Hk
78. 60. Fi
Carrier trapping mechanisms
charge balance
electrical property
OLEDs
optical property
rubrene EML
Charge
Efficiency
Light emitting diodes
Luminescence
PACS numbers 85. 60 Jb
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Summary:The efficiency of the organic light-emitting devices (OLEDs) was enhanced with increasing thickness of a 5,6,11,12-tetraphenylnaphthacene (rubrene) emission layer (EML). The charge trapping and the luminance mechanisms were affected by the thickness of the rubrene layer, regardless of the existence of the barrier layers. The variation in the electroluminescence spectra of devices originated from a variation in the position of the recombination region with increasing thickness of the EML. The enhancement of the luminescence efficiency for devices was attributed to the better charge balance and the optimized recombination region.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2013.844382