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Optical Investigation of Defects in p-type CuInSe2 Single Crystals

✍ Scribed by Prof. Dr. H. Neumann; Dr. P. A. Jones; Dr. H. Sobotta; Dr. W. Hörig; Dr. R. D. Tomlinson; Dr. M. V. Yakushev

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
741 KB
Volume
31
Category
Article
ISSN
0232-1300

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✦ Synopsis

Optical absorption spectra in the photon energy range from 0.03 to 1. I eV and photoreflectance spectra in the range of the fundamental edge are measured on p-type CuInSez single crystals. Besides a dominant contribution to the absorption coefficient due to intervalence band transitions below about 0.75 eV the spectra revealed five additional structures that can be ascribed to defect induced optical transitions with characteristic energies between 0.48 and 0.72 eV. Based on a comparison of the near-edge optical absorption and photoreflectance spectra a shallow defect (donor or acceptor) with an ionisation energy of about 46 meV was identified.

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Photoconductivity Spectra of n-type CuIn
Photoconductivity Spectra of n-type CuInSe2 Single Crystals
✍ Dr. M. A. Slifkin; Dr. A. Al-Rahmani; Dr. M. Imanieh; Dr. R. D. Tomlinson; Dr. H 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 684 KB

Photoconductivity spectra of n-type CuInSe, single crystals are measured in the photon energy range hv = 0.75 -3.1 eV and as a function of temperature in the range T = 80-320 K. It is found that the photoconductivity of as-grown crystals is a nearly pure surface effect, while sensitization of the cr