Thermally evaporated CdTe thin films for solar cell applications: Optimization of physical properties
| Autor: | B.M.K. Pemasiri, B.S. Dassanayake, P.K.K. Kumarasinghe, Amila Dissanayake |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Analytical chemistry 02 engineering and technology Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Isotropic etching Cadmium telluride photovoltaics law.invention Carbon film Mechanics of Materials law 0103 physical sciences Solar cell Deposition (phase transition) General Materials Science Composite material Thin film 0210 nano-technology |
| Zdroj: | Materials Research Bulletin. 96:188-195 |
| ISSN: | 0025-5408 |
| Popis: | Microstructure and other physical properties of CdTe thin films are directly affected by the deposition conditions as well as post deposition treatments. In this respect, CdTe films were fabricated using thermal evaporation technique at different substrate temperatures from 125 to 300 °C and subjected to post deposition air annealing and chemical etching to observe the alterations of structural, optical and electrical properties. Larger crystallite size, lowest strain and dislocation density were observed for the films fabricated at a substrate temperature of 250 °C. Lowest Urbach energy, refractive index, optical conductivity, extinction coefficient and dielectric constants were also found for films deposited under a substrate temperature of 250 °C. Additionally, lower resistivity was observed for the films etched with NP etchant compared to the un-etched films. According to the results, films fabricated at a substrate temperature of 250 °C can be concluded as the best films for potential photovoltaic applications. |
| Databáze: | OpenAIRE |
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