I-V characteristics of HgI2 crystal with sputtered Au and electroless Au contacts

Gang Xu, Wan Qi Jie, Gao Hong Li

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Abstract

I-V characteristics of HgI2 crystal wafers with the contacts of sputtered gold (Au/HgI2) and coated chloroauric acid (AuCl3/HgI2) were studied using Agilent4155 CVIV instrument. The results indicate that the fitting data b, representing ohmic contacts proterties, were 0.89 and 1.06, respectively. The resistivity of HgI2 crystal was 109 Ω·cm. The calculated value of contact resistance, 1.6×107Ω for Au/HgI2 and 4.3×106 Ω for AuCl3/HgI2, showed that AuCl3/HgI2 could generate lower contact resistance. Au electrode formed from decomposition of chloroauric acid produces better ohmic contacts comparing with that of sputtering gold. The sputtering process deteriorated the interface quality of HgI2 crystal wafers, resulting worse ohmic contacts properties.

Original languageEnglish
Pages (from-to)1008-1011
Number of pages4
JournalRengong Jingti Xuebao/Journal of Synthetic Crystals
Volume38
Issue number4
StatePublished - Aug 2009

Keywords

  • Au
  • AuCl
  • Contact properties
  • HgI
  • I-V Character

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