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Proceedings Paper

Middle-infrared electroluminescence of n-type Cr-doped ZnSe crystals
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Paper Abstract

We report the study of middle-infrared electroluminescence of n-type, Cr doped bulk ZnSe crystals. n-type, Cr-doped ZnSe samples were prepared in three stages. At the first stage, the undoped polycrystalline ZnSe samples were grown by chemical vapor deposition. During the second stage, the doping of 1 mm thick ZnSe polycrystalline wafers was performed by post-growth thermal diffusion of Cr. Finally, Cr:ZnSe wafers were annealed with Al2Se3 and ZnSe powders in sealed vacuumed ampoules at 950°C for 96 hours. Comparison of the absorption spectra of the crystals before and after thermal diffusion with Aluminum indicates the preservation of the desired Cr2+ ions. Ohmic contacts for electrical measurements were formed by polishing the facets and wetting the surface of the crystals with In. The best crystals demonstrated conductivity of up to 10-100 ohm*cm. The electroluminescence measurements were taken using synchronous detection methods with an InSb detector. A pulse generator output (100V) at 5 kHz and a lock-in amplifier were used to distinguish luminescence signals from other possible noise sources. We report the observation of middleinfrared (2-3μm and 8μm) and visible (~600 nm) electroluminescence of n-type Cr doped bulk ZnSe crystals.

Paper Details

Date Published: 28 February 2006
PDF: 8 pages
Proc. SPIE 6100, Solid State Lasers XV: Technology and Devices, 61000Y (28 February 2006); doi: 10.1117/12.646935
Show Author Affiliations
Lawrence Luke, Univ. of Alabama at Birmingham (United States)
Univ. of Massachusetts at Boston (United States)
Vladimir V. Fedorov, Univ. of Alabama at Birmingham (United States)
Igor Moskalev, Univ. of Alabama at Birmingham (United States)
Andrew Gallian, Univ. of Alabama at Birmingham (United States)
Sergey B. Mirov, Univ. of Alabama at Birmingham (United States)


Published in SPIE Proceedings Vol. 6100:
Solid State Lasers XV: Technology and Devices
Hanna J. Hoffman; Ramesh K. Shori, Editor(s)

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