• 文献标题:   Bias-polarity-dependent UV/visible transferable electroluminescence from ZnO nanorod array LED with graphene oxide electrode supporting layer
  • 文献类型:   Article
  • 作  者:   LIU WZ, WANG W, XU HY, LI XH, YANG L, MA JG, LIU YC
  • 作者关键词:  
  • 出版物名称:   APPLIED PHYSICS EXPRESS
  • ISSN:   1882-0778 EI 1882-0786
  • 通讯作者地址:   NE Normal Univ
  • 被引频次:   5
  • DOI:   10.7567/APEX.8.095202
  • 出版年:   2015

▎ 摘  要

A simple top electrode preparation process, employing continuous graphene oxide films as electrode supporting layers, was adopted to fabricate a ZnO nanorod array/p-GaN heterojunction LED. The achieved LED demonstrated different electroluminescence behaviors under forward and reverse biases: a yellow-red emission band was observed under forward bias, whereas a blue-UV emission peak was obtained under reverse bias. Electroluminescence spectra under different currents and temperatures, as well as heterojunction energy-band alignments, reveal that the yellow-red emission under forward bias originates from recombinations related to heterointerface defects, whereas the blue-UV electroluminescence under reverse bias is ascribed to transitions from near-band-edge and Mg-acceptor levels in p-GaN. (C) 2015 The Japan Society of Applied Physics