Controllable synthesis of vertically aligned p-type GaN nanorod arrays on N-type Si substrates for heterojunction diodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Yong-Bing Tang
  • Xiang-Hui Bo
  • Hong-Tao Cong
  • Hui-Ming Cheng
  • Zhen-Hua Chen
  • Igor Bello
  • Shuit-Tong Lee

Detail(s)

Original languageEnglish
Pages (from-to)3515-3522
Journal / PublicationAdvanced Functional Materials
Volume18
Issue number21
Publication statusPublished - 10 Nov 2008

Abstract

A new catalyst seeding method is presented, in which aerosolized catalyst nanoparticles are continuously self-assembled onto amine-terminated silicon substrates in gas phase to realize controllable synthesis of vertically aligned Mg-doped GaN nanorod arrays on n-type Si (111) substrates. The diameter, areal density, and length of GaN nanorods can be controlled by adjusting the size of Au nanoparticles, flowing time of Au nanoparticles, and growth time, respectively. Based on the synthesis of p-type GaN nanorods on n-type Si substrates, p-GaN nanorod/n-Si heterojunction diodes are fabricated, which exhibit well-defined rectifying behavior with a low turn-on voltage of ∼1.0 V and a low leakage current even at a reverse bias up to 10 V. The controllable growth of GaN nanorod arrays and the realization of p-type GaN nanorod/n-type Si heterojunction diodes open up opportunities for low-cost and high-performance optoelectronic devices based on these nanostructured arrays. © 2008 WILEY-VCH Verlag GmbH & Co. KGaA.

Citation Format(s)

Controllable synthesis of vertically aligned p-type GaN nanorod arrays on N-type Si substrates for heterojunction diodes. / Tang, Yong-Bing; Bo, Xiang-Hui; Lee, Chun-Sing; Cong, Hong-Tao; Cheng, Hui-Ming; Chen, Zhen-Hua; Zhang, Wen-Jun; Bello, Igor; Lee, Shuit-Tong.

In: Advanced Functional Materials, Vol. 18, No. 21, 10.11.2008, p. 3515-3522.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal