Near-edge Optical Properties of CuInSe2 Studied by Photoacoustic Spectroscopy
β Scribed by A. Zegadi; Prof. Dr. H. Neumann; Dr. M. A. Slifkin; Dr. R. D. Tomlinson
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 317 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0232-1300
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β¦ Synopsis
Optical absorption spectra of n-type CuInSez single crystals were evaluated by means of photoacoustic spectroscopy in the photon energy range from 0.94 to 1.02 eV. At photon energies below 0.99 eV the spectra exhibit exponential tails that are ascribed to the presence of shallow impurity states. At higher photon energies the absorption coefficients follow the relation for direct allowed optical transitions between parabolic bands. The parameters of this relation are determined and compared with previous measurements.
Optische Absorptionsspektren n-leitender CuInSe,-Einkristalle wurden mit Hilfe der photoakustischen Spektroskopie im Photonenenergiebereich von 0.94 bis 1.02 eV bestimmt. Bei Photonenenergien unterhalb 0.99 eV zeigen die Absorptionsspektren exponentielle Auslaufer, die dem Vorhandensein flacher Storzellen zugeschrieben werden. Bei hoheren Photonenenergien folgen die Absorptionskoeffzienten der Beziehung fur direkte erlaubte optische Ubergange zwischen parabolischen Bandern. Die Parameter dieser Beziehung werden bestimmt und mit fruheren Messungen verglichen.
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