Photoreflectance study of AgGaTe2 single crystals

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

doi:10.1016/j.physb.2010.11.002

Photoreflectance study of AgGaTe2 single crystals

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

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20 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.

Original language	English
Pages (from-to)	418-420
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	406
Issue number	3
DOIs	https://doi.org/10.1016/j.physb.2010.11.002
Publication status	Published - 1 Feb 2011

Keywords

ternary chalcopyrite AgGaTe2
photoreflectance
semiconductor
solar energy materials
semiconductors
shape

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10.1016/j.physb.2010.11.002

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title = "Photoreflectance study of AgGaTe2 single crystals",

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.",

keywords = "ternary chalcopyrite AgGaTe2, photoreflectance, semiconductor, solar energy materials, semiconductors, shape",

author = "T. Raadik and J. Krustok and Yakushev, {M. V.}",

year = "2011",

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doi = "10.1016/j.physb.2010.11.002",

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journal = "Physica B: Condensed Matter",

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T1 - Photoreflectance study of AgGaTe2 single crystals

AU - Raadik, T.

AU - Krustok, J.

AU - Yakushev, M. V.

PY - 2011/2/1

Y1 - 2011/2/1

N2 - 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.

AB - 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.

KW - ternary chalcopyrite AgGaTe2

KW - photoreflectance

KW - semiconductor

KW - solar energy materials

KW - semiconductors

KW - shape

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U2 - 10.1016/j.physb.2010.11.002

DO - 10.1016/j.physb.2010.11.002

M3 - Article

SN - 0921-4526

VL - 406

SP - 418

EP - 420

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 3

ER -

Photoreflectance study of AgGaTe2 single crystals

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