| Autor: |
Wellings, J.S.1 jayne.s.wellings@student.shu.ac.uk, Samantilleke, A.P.1, Heavens, S.N.2, Warren, P.3, Dharmadasa, I.M.1 |
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| Zdroj: |
Solar Energy Materials & Solar Cells. Sep2009, Vol. 93 Issue 9, p1518-1523. 6p. |
| Abstrakt: |
Abstract: Polycrystalline chalcopyrite thin films were potentiostatically electrodeposited from ethylene glycol solution onto SnO2-coated glass substrates at 150°C. The thickness of the layers was estimated using talysurf at 1.0μm after deposition for 60min. X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyses were used to identify and characterise compounds formed at different potentials. It was found that Cu1.75Se formation was dominant at −0.80V vs Se and indium assimilation increased at more negative voltages forming a mixture of compounds including numerous Cu–Se binary phases and copper indium diselenide (CuInSe2) at the cathode. As-deposited materials showed poor crystallinity and therefore films were annealed in Ar/5%H2 in the presence of Se to improve the material quality for all investigations. Although the films were deposited at 150°C, no noticeable improvement of the CuInSe2 was observed, suggesting growth from aqueous media at room temperature to be preferable. [Copyright &y& Elsevier] |
| Databáze: |
GreenFILE |
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