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2015 ; 5
(ä): 13483
Nephropedia Template TP
Oh M
; Jin WY
; Jeong HJ
; Jeong MS
; Kang JW
; Kim H
Sci Rep
2015[Sep]; 5
(ä): 13483
PMID26333768
show ga
Silver nanowires (AgNWs) have been successfully demonstrated to function as
next-generation transparent conductive electrodes (TCEs) in organic semiconductor
devices owing to their figures of merit, including high optical transmittance,
low sheet resistance, flexibility, and low-cost processing. In this article,
high-quality, solution-processed AgNWs with an excellent optical transmittance of
96.5% at 450?nm and a low sheet resistance of 11.7??/sq were demonstrated as TCEs
in inorganic III-nitride LEDs. The transmission line model applied to the AgNW
contact to p-GaN showed that near ohmic contact with a specific contact
resistance of ~10(-3)??cm(2) was obtained. The contact resistance had a strong
bias-voltage (or current-density) dependence: namely, field-enhanced ohmic
contact. LEDs fabricated with AgNW electrodes exhibited a 56% reduction in series
resistance, 56.5% brighter output power, a 67.5% reduction in efficiency droop,
and a approximately 30% longer current spreading length compared to LEDs
fabricated with reference TCEs. In addition to the cost reduction, the observed
improvements in device performance suggest that the AgNWs are promising for
application as next-generation TCEs, to realise brighter, larger-area,
cost-competitive inorganic III-nitride light emitters.