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Journal of Nanophotonics

Photon absorption coefficient (α) for a low-dimensional CdS/CdTe absorber by a partial k-selection approach
Author(s): Jose R. Villa-Angulo; Rafael Villa-Angulo; Carlos E. Villa-Angulo
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Paper Abstract

The dependence of photon absorption by a low-dimensional cadmium-sulfide/cadmium-telluride (CdS/CdTe) heterostructured absorber on the thickness and number of CdTe active layers is investigated. The equation for the photon absorption coefficient (α) used is based on the partial momentum k-selection approach. Theoretical results show that absorption greater than 4×104  cm−1 is obtained when the thickness of the active layer reaches 50 Å. Similarly, with each additional CdTe active layer in the heterostructured absorber, a relative increase of 0.5×104  cm−1 in photon absorption is achieved. The relation between photoelectric quantum efficiency and photon absorption is determined by the number and thickness of the CdTe active layers in the heterostructured absorber. A quantum efficiency greater than 0.9 is obtained using 15 active layers with a thickness of 50 Å.

Paper Details

Date Published: 10 January 2013
PDF: 13 pages
J. Nanophoton. 7(1) 073099 doi: 10.1117/1.JNP.7.073099
Published in: Journal of Nanophotonics Volume 7, Issue 1
Show Author Affiliations
Jose R. Villa-Angulo, Univ. Politécnica de Baja California (Mexico)
Rafael Villa-Angulo, Univ. Politécnica de Baja California (Mexico)
Carlos E. Villa-Angulo, Univ. Autónoma de Baja California (Mexico)


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