Photoreflectance study of AgGaTe2 single crystals

T. Raadik, J. Krustok, M. V. Yakushev

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The optical properties of ternary chalcopyrite AgGaTe2 were studied by photoreflectance spectorscopy (PR). Due to the optimal direct energy gap and high absorption coefficient AgGaTe2 is a promising material for solar energy conversion. Single crystals used in this work were grown by the vertical Bridgman technique. The PR temperature dependent spectra were measured in the range of 25–300 K. At room temperature two energy gaps in AgGaTe2 were detected: and , with temperature coefficients /dT=−2.1×10−4 eV/K and /dT=−3.4×10−4 eV/K. At low temperature (T=25 K) these bandgap energies were and . Temperature dependence of bandgap energies is maximum at about T=90 K.
LanguageEnglish
Pages418-420
Number of pages3
JournalPhysica B: Condensed Matter
Volume406
Issue number3
DOIs
Publication statusPublished - 1 Feb 2011

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Single crystals
Energy gap
single crystals
solar energy conversion
Temperature
absorptivity
Energy conversion
Solar energy
optical properties
Optical properties
temperature dependence
temperature
energy
room temperature
coefficients

Keywords

  • ternary chalcopyrite AgGaTe2
  • photoreflectance
  • semiconductor
  • solar energy materials
  • semiconductors
  • shape

Cite this

Raadik, T. ; Krustok, J. ; Yakushev, M. V. / Photoreflectance study of AgGaTe2 single crystals. In: Physica B: Condensed Matter. 2011 ; Vol. 406, No. 3. pp. 418-420.
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Photoreflectance study of AgGaTe2 single crystals. / Raadik, T.; Krustok, J.; Yakushev, M. V.

In: Physica B: Condensed Matter, Vol. 406, No. 3, 01.02.2011, p. 418-420.

Research output: Contribution to journalArticle

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