Piezoelectric photoacoustic spectra in CuGaSe2 thin films grown by molecular beam epitaxy

Kenji Yoshino; Daisuke Maruoka; Masakazu Kawahara; Atsuhiko Fukuyama; Kouji Maeda; Paul J. Fons; Shigeru Niki; Akimasa Yamada; Tetsuo Ikari

Piezoelectric photoacoustic spectra in CuGaSe₂ thin films grown by molecular beam epitaxy

Kenji Yoshino, Daisuke Maruoka, Masakazu Kawahara, Atsuhiko Fukuyama, Kouji Maeda, Paul J. Fons, Shigeru Niki, Akimasa Yamada, Tetsuo Ikari

Research output: Contribution to journal › Conference article › peer-review

Abstract

The piezoelectric photoacoustic (PPA) spectra for Cu-rich CuGaSe₂ (CGS)/GaAs epitaxial layers were successfully observed between liquid nitrogen and room temperatures for the first time. Bandgap energy of CGS (A band) is estimated to be 1.72 eV at liquid nitrogen temperature. The activation energies of three possible intrinsic defect levels are estimated to be about 80, 130 and 190 meV.

Original language	English
Pages (from-to)	151-155
Number of pages	5
Journal	Materials Research Society Symposium - Proceedings
Volume	485
Publication status	Published - 1998 Jan 1
Externally published	Yes
Event	Proceedings of the 1997 MRS Fall Meeting - Boston, MA, USA Duration: 1997 Dec 2 → 1997 Dec 5

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Piezoelectric photoacoustic spectra in CuGaSe2 thin films grown by molecular beam epitaxy",

abstract = "The piezoelectric photoacoustic (PPA) spectra for Cu-rich CuGaSe2 (CGS)/GaAs epitaxial layers were successfully observed between liquid nitrogen and room temperatures for the first time. Bandgap energy of CGS (A band) is estimated to be 1.72 eV at liquid nitrogen temperature. The activation energies of three possible intrinsic defect levels are estimated to be about 80, 130 and 190 meV.",

author = "Kenji Yoshino and Daisuke Maruoka and Masakazu Kawahara and Atsuhiko Fukuyama and Kouji Maeda and Fons, {Paul J.} and Shigeru Niki and Akimasa Yamada and Tetsuo Ikari",

year = "1998",

month = jan,

day = "1",

language = "English",

volume = "485",

pages = "151--155",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1997 MRS Fall Meeting ; Conference date: 02-12-1997 Through 05-12-1997",

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TY - JOUR

T1 - Piezoelectric photoacoustic spectra in CuGaSe2 thin films grown by molecular beam epitaxy

AU - Yoshino, Kenji

AU - Maruoka, Daisuke

AU - Kawahara, Masakazu

AU - Fukuyama, Atsuhiko

AU - Maeda, Kouji

AU - Fons, Paul J.

AU - Niki, Shigeru

AU - Yamada, Akimasa

AU - Ikari, Tetsuo

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The piezoelectric photoacoustic (PPA) spectra for Cu-rich CuGaSe2 (CGS)/GaAs epitaxial layers were successfully observed between liquid nitrogen and room temperatures for the first time. Bandgap energy of CGS (A band) is estimated to be 1.72 eV at liquid nitrogen temperature. The activation energies of three possible intrinsic defect levels are estimated to be about 80, 130 and 190 meV.

AB - The piezoelectric photoacoustic (PPA) spectra for Cu-rich CuGaSe2 (CGS)/GaAs epitaxial layers were successfully observed between liquid nitrogen and room temperatures for the first time. Bandgap energy of CGS (A band) is estimated to be 1.72 eV at liquid nitrogen temperature. The activation energies of three possible intrinsic defect levels are estimated to be about 80, 130 and 190 meV.

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UR - http://www.scopus.com/inward/citedby.url?scp=0031621785&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0031621785

SN - 0272-9172

VL - 485

SP - 151

EP - 155

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1997 MRS Fall Meeting

Y2 - 2 December 1997 through 5 December 1997

ER -

Piezoelectric photoacoustic spectra in CuGaSe₂ thin films grown by molecular beam epitaxy

Abstract

ASJC Scopus subject areas

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