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Multifaceted analysis of copper-doped cadmium selenide thin films: exploring crystallography data, opto-electrical properties, and thermoelectric power

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Abstract

The utilization of dip coating methods enabled the preparation of thin films of copper-doped cadmium selenide. Notably, improvements in cadmium selenide properties were observed with varying dopant compositions, ranging from 0.01 to 1.0 mol%. As the amount of copper increased, the colour of the film darkened, reaching its maximum thickness at 0.1 mol%. Crystallographic studies unveiled a hexagonal system for all compositions. Various parameters were determined and found to be optimized for 0.1 mol%. The optical studies, which were examined using spectrophotometer and PL techniques, revealed a nonlinear increase in optical density as the copper content increased to 0.1 mol%. Additionally, Scanning Electron Microscopy illustrated that grain sizes initially increased with copper content up to 0.1 mol%, then decrease. Furthermore, Atomic Absorption Spectroscopy confirmed the stoichiometric accuracy of the prepared thin films and it found that materials have nearly stoichiometric. Regarding electrical properties, conductance at 300 K showed enhancement with increasing copper content up to 0.1 mol%, followed by a decrease. Moreover, copper-doped CdSe samples exhibited p-type conductivity, while mobility improved with copper content up to 0.1 mol%. The crystallographic, opto-electrical and thermoelectric performance of Cu doped cadmium selenide thin films are examined in detail through these comprehensive studies to gain a deeper understanding. This knowledge is necessary for optimizing the material’s properties for different uses, such as photoelectrics, light-emitting diodes, and thermoelectric energy conversion devices.

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P. A. Chate: conceptualization, methodology, review and editing. D. J. Sathe: writing an original draft, data collection, supervision. V. D. Bhabad: characterization of X-ray diffraction, scanning electron micrograph.

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Correspondence to P. A. Chate or D. J. Sathe.

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Chate, P.A., Sathe, D.J. & Bhabad, V.D. Multifaceted analysis of copper-doped cadmium selenide thin films: exploring crystallography data, opto-electrical properties, and thermoelectric power. J Mater Sci: Mater Electron 35, 1305 (2024). https://doi.org/10.1007/s10854-024-13068-4

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