Optoelectronic characteristics of close-packed HgTe nanoparticles in the infrared range

Hyunsuk Kim, Kyoungah Cho, Byungjun Park, Jin Hyoung Kim, Jun Woo Lee, Sangsig Kim, Taeyong Noh, Eunjoo Jang

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Absorption, photoluminescence (PL), photoresponse, and I-V measurements were made for a close-packed HgTe nanoparticle film without organic capping materials to investigate its optoelectronic characteristics in the infrared (IR) range. In the absorption and PL spectra taken for the close-packed nanoparticle film, the wavelength of exciton peak was red-shifted, compared with 1-thioglycerol capped HgTe nanoparticles dispersed in solution. For the HgTe nanoparticle film, dark current was below several pA level, current was increased by about three orders of magnitude at a biased voltage of 3 V under the illumination, and photoresponse was very rapid compared with 1-thioglycerol capped HgTe nanoparticles. These optoelectronic characteristics illustrate that HgTe nanoparticles are one of promising materials for the photodetector in the IR range. Finally, the origin for the increase of photocurrent with increasing temperature observed in this study will be discussed.

Original languageEnglish
Pages (from-to)315-319
Number of pages5
JournalSolid State Communications
Volume137
Issue number6
DOIs
Publication statusPublished - 2006 Feb

Keywords

  • A. HgTe nanoparticles
  • B. Trap-mediated hopping process
  • D. Photocurrent
  • E. Photoluminesence

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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