Ordered ZnO nanorods-based heterojunction light-emitting diodes with graphene current spreading layer

Ordered ZnO nanorods-based heterojunction light-emitting diodes with graphene current spreading layer
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具有石墨烯电流扩散层的有序ZnO纳米棒基异质结发光二极管

DOI:
10.1063/1.4753926
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发表时间:
2012-09
影响因子:
4
通讯作者:
Gao, H. L.
Gao, H. L.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, S. G.;Zhang, X. W.;Si, F. T.;Dong, J. J.;Wang, J. X.;Liu, X.;Yin, Z. G.;Gao, H. L.

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采用几层石墨烯作为电流扩散层,制备了基于有序 ZnO 纳米棒的异质结发光二极管 (LED)。低电流下的强发射表明 GaN 和有序 ZnO 纳米棒之间具有高界面质量,以及石墨烯产生的电流扩散效应。与传统氧化铟锡电极的ZnO纳米棒基LED相比,其电致发光性能得到了改善,这归因于石墨烯和ZnO纳米棒之间稳定、可靠、低电阻的欧姆接触,以及石墨烯的高透射率。这些结果证明了使用石墨烯作为高效 ZnO 纳米棒基 LED 电极的可行性。
Ordered ZnO nanorods-based heterojunction light-emitting diodes (LEDs) have been fabricated by adopting few-layer graphene as a current spreading layer. The strong emission at low currents infers the high interfacial quality between GaN and ordered ZnO nanorods, and the current spreading effect resulting from graphene. The improved electroluminescence performance was achieved compared to the ZnO nanorods-based LED with a conventional indium-tin-oxide electrode, which can be attributed to the stable, reliable, and low resistance ohmic-contacts between graphene and ZnO nanorods, as well as the high transmittance of graphene. These results demonstrate feasibility of using graphene as electrodes for high-efficiency ZnO nanorods-based LEDs.
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