Effect of bath temperature and annealing on the formation of CuInSe2
| Autor: | L. Ouahab, C. Benazzouz, N. Benouattas, Mohamed Benaicha |
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| Rok vydání: | 2009 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Annealing (metallurgy) Scanning electron microscope Inorganic chemistry chemistry.chemical_element Copper Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Amorphous solid chemistry.chemical_compound chemistry Chemical engineering law Molybdenum Selenide Crystallization Selenium |
| Zdroj: | Solar Energy Materials and Solar Cells. 93:262-266 |
| ISSN: | 0927-0248 |
| Popis: | CuInSe 2 films of 2 μm thickness were electrodeposited potentiostatically, from aqueous solution containing thiocyanate as a complexing agent, on Mo substrates. For all the experiments, the potential of the potentiostatic deposition of the materials was chosen to be −1 V, whereas the bath temperature of electrolyte was varied from 20 to 80 °C. It was found that the electrodeposited CuInSe 2 was characterized by an amorphous layer and densely-packed nanometric grains with a good homogeneity. After vacuum annealing at 200 °C, glancing angle X-ray diffraction revealed the presence of the CuInSe 2 phase whereas annealing under selenium atmosphere lead to the growth of molybdenum selenide compound MoSe 2 , in addition to a better crystallization of the copper indium diselenide compound. Scanning electron microscopic revealed that despite an increase in the grains dimensions, there was no significant change in the films surface morphology when the bath temperature was varied from 20 to 80 °C. At the same time, the composition of the electrodeposited Cu–In–Se layers becomes richer in copper. This increase in copper concentration is mainly compensated by a deficit in selenium atoms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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