Growth and photovoltaic properties of high-quality GaAs nanowires prepared by the two-source CVD method

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

9 Scopus Citations
View graph of relations

Author(s)

  • Ying Wang
  • Zaixing Yang
  • Xiaofeng Wu
  • Ning Han
  • Hanyu Liu
  • Shuobo Wang
  • Jun Li
  • WaiMan Tse
  • Yunfa Chen

Detail(s)

Original languageEnglish
Article number191
Journal / PublicationNanoscale Research Letters
Volume11
Online published12 Apr 2016
Publication statusPublished - 2016

Link(s)

Abstract

Growing high-quality and low-cost GaAs nanowires (NWs) as well as fabricating high-performance NW solar cells by facile means is an important development towards the cost-effective next-generation photovoltaics. In this work, highly crystalline, dense, and long GaAs NWs are successfully synthesized using a two-source method on non-crystalline SiO2 substrates by a simple solid-source chemical vapor deposition method. The high V/III ratio and precursor concentration enabled by this two-source configuration can significantly benefit the NW growth and suppress the crystal defect formation as compared with the conventional one-source system. Since less NW crystal defects would contribute fewer electrons being trapped by the surface oxides, the p-type conductivity is then greatly enhanced as revealed by the electrical characterization of fabricated NW devices. Furthermore, the individual single NW and high-density NW parallel arrays achieved by contact printing can be effectively fabricated into Schottky barrier solar cells simply by employing asymmetric Ni-Al contacts, along with an open circuit voltage of ~0.3 V. All these results indicate the technological promise of these high-quality two-source grown GaAs NWs, especially for the realization of facile Schottky solar cells utilizing the asymmetric Ni-Al contact.

Research Area(s)

  • GaAs, Chemical vapor deposition , Two-source, Contact printing, Nanowire parallel arrays , Schottky solar cells

Citation Format(s)

Growth and photovoltaic properties of high-quality GaAs nanowires prepared by the two-source CVD method. / Wang, Ying; Yang, Zaixing; Wu, Xiaofeng; Han, Ning; Liu, Hanyu; Wang, Shuobo; Li, Jun; Tse, WaiMan; Yip, SenPo; Chen, Yunfa; Ho, Johnny C.

In: Nanoscale Research Letters, Vol. 11, 191, 2016.

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

Download Statistics

No data available