Synthesis and band gap tuning in CdSe(1-x)Te(x) thin films for solar cell applications
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Ltd
Abstract
Thin films of CdSe<inf>(1-x)</inf>Te<inf>(x)</inf> (x = 0 – 1) were grown on to the glass substrates by thermal evaporation method (PVD). The effect of annealing duration on the formation of single phase ternary alloys were systematically investigated. The prepared thin films were characterized by using FE-SEM, EDS and X-ray diffractometer. The X-ray diffraction studies shows that vacuum annealed films are polycrystalline in nature, and well oriented along a preferred direction of (0 0 2) for hexagonal and along (1 1 1) for cubic crystal structure. It is observed that increase in the CdTe concentration leads to change in the crystal structure from hexagonal to cubic. The absorption coefficients and optical band gaps were evaluated from spectrometric measurements. It is observed that optical band gap can be tuned from 1.67 eV to 1.51 eV as value of x varied from 0 to 1. © 2017 Elsevier Ltd
Description
Keywords
Crystal structure, Energy gap, Optical band gaps, Solar cells, Solar power generation, Substrates, Thermal evaporation, Thin film solar cells, Transition metal alloys, Transition metals, X ray diffraction, CdSeTe, Cubic crystal structures, Photovoltaic materials, Solar-cell applications, Spectrometric measurements, Thermal evaporation method, Transition metal alloys and compounds, X-ray diffraction studies, Thin films, absorption, alloy, concentration (composition), crystal structure, crystallinity, fuel cell, photovoltaic system, solar power, transition element
Citation
Solar Energy, 2017, 153, , pp. 343-347