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Realization and characterization of an ITO/AZO/SiO2 / p - Si SIS heterojunction

  • Bo He
  • , Zhong Quan Ma
  • , Jing Xu
  • , Lei Zhao
  • , Nan Sheng Zhang
  • , Feng Li
  • , Cheng Shen
  • , Ling Shen
  • , Xia Jie Meng
  • , Cheng Yue Zhou
  • , Zheng Shan Yu
  • , Yan Ting Yin

Research output: Contribution to journalArticlepeer-review

Abstract

A novel ITO/AZO/SiO2/p-Si SIS heterojunction has been fabricated by low temperature thermal growth of an ultrathin silicon dioxide and RF sputtering deposition of ITO/AZO double films on a p-Si texturized substrate. The crystalline structure and the optical and electrical properties of the ITO/AZO antireflection films were characterized by X-ray diffraction (XRD), UV-VIS spectrophotometry, and four-point probe measurements, respectively. The results show that the ITO/AZO films are of good quality. The electrical junction properties were investigated by I - V measurement, which reveals that the heterojunction shows strong rectifying behavior under a dark condition. The ideality factor and the saturation current of this diode are 2.3 and 1.075×10-5 A, respectively, and the value of IF/IR (IF and IR stand for forward and reverse current, respectively) at 2 V is found to be as high as 16.55. The junction shows fairly good rectifying behavior, indicating the formation of a diode between AZO and p-Si. High photocurrent is obtained under a reverse bias when the crystalline quality of ITO/AZO double films is good enough to transmit the light into the p-Si. Crown

Original languageEnglish (US)
Pages (from-to)664-671
Number of pages8
JournalSuperlattices and Microstructures
Volume46
Issue number4
DOIs
StatePublished - Oct 2009
Externally publishedYes

Keywords

  • Al-doped ZnO (AZO)
  • Current-voltage (I - V) characteristics
  • Indium tin oxide (ITO)
  • SIS heterojunction
  • Sputtering

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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