Ordered Nanowire Array Blue/Near-UV Light Emitting Diodes (pages 4749–4753)
Sheng Xu, Chen Xu, Ying Liu, Youfan Hu, Rusen Yang, Qing Yang, Jae-Hyun Ryou, Hee Jin Kim, Zachary Lochner, Suk Choi, Russell Dupuis and Zhong Lin Wang
Version of Record online: 22 SEP 2010 | DOI: 10.1002/adma.201002134
Blue/near-UV light emitting diodes composed of position controlled n-ZnO nanowires arrays and a p-GaN thin film substrate are demonstrated. Under forward bias, each single nanowire is a light emitter. By Gaussian deconvolution of the emission spectrum, the origins of the blue/near-UV emission are assigned specifically to three distinct electron-hole recombination processes. The LEDs give an external quantum efficiency of 2.5%.