Optical and thermal studies of deep levels in the photorefractive ternary compound CdIn2Te4

Mayer Tapiero; Zakaria Guellil

doi:10.1117/12.507427

21 October 2003 Optical and thermal studies of deep levels in the photorefractive ternary compound CdIn₂Te₄

Mayer Tapiero, Zakaria Guellil

Proceedings Volume 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX; (2003) https://doi.org/10.1117/12.507427
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Photoelectronic processes in CdIn₂Te₄ are investigated by means of photoconductivity studies and by the thermal spectroscopy: the photoinduced current transient spectroscopy. The so-called four-gate method shows that we are in presence of a continuous or quasi-continuous distribution of levels in the energy bandgap. This occurs in the whole range of energy prospected: 0.1 to 0.7 eV. The analysis of the decay of the photocurrent transients at various temperatures allows to calculate the density of states and leads to the conclusion that the trap distribution inside the gap is formed by two parts: a continuous exponential trap distribution under the conduction band, until 0.35 eV, and a Gaussian distribution from 0.35 to 0.7 eV with a maximum at 0.55 eV, near the middle of the gap.

Citation Download Citation

Mayer Tapiero and Zakaria Guellil "Optical and thermal studies of deep levels in the photorefractive ternary compound CdIn₂Te₄", Proc. SPIE 5206, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications IX, (21 October 2003); https://doi.org/10.1117/12.507427

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