Organic light-emitting diodes with carrier balance structures

Organic light-emitting diodes (OLEDs) with high luminance efficiency were successfully fabricated using the LiF/ N , N ′-bis(1-naphyl)- N , N ′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) carrier balance structures. It was found that the insertion of the LiF/NPB carrier balance structures can balance...

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Bibliographic Details
Published in:Optical review (Tokyo, Japan) Japan), 2011-01, Vol.18 (1), p.111-113
Main Author: Chen, Chin-Hsiang
Format: Article
Language:English
Subjects:
Atomic
Lasers
Microwaves
Molecular
Optical and Plasma Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Quantum Optics
Regular Papers
RF and Optical Engineering
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Summary:Organic light-emitting diodes (OLEDs) with high luminance efficiency were successfully fabricated using the LiF/ N , N ′-bis(1-naphyl)- N , N ′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) carrier balance structures. It was found that the insertion of the LiF/NPB carrier balance structures can balance the charge injection and transport, which is helpful in enhancing the performance of OLEDs. It was also found that we can achieve the best performance from the OLED with three pairs of LiF/NPB (0.3 nm/15 nm) structures. The luminance and transport efficiency were both enhanced with the increase in the numbers of pairs of LiF/NPB carrier balance structures. We can attribute the improvement to the better carrier balance at the device interface.
ISSN:1340-6000
1349-9432
DOI:10.1007/s10043-011-0004-4