Lattice Parameter and Optical Absorption Characterization of CulnSe2 (CIS) Films

Autor:	Al-Bassam, A.A.I., Elani, U.A.
Jazyk:	angličtina
Rok vydání:	2012
Předmět:	Thin Film Solar Cells CdTe CIS and Related Ternary and Quaternary Thin Film Solar Cells
DOI:	10.4229/27theupvsec2012-3dv.3.52
Popis:	27th European Photovoltaic Solar Energy Conference and Exhibition; 2847-2850 Thin films polycrystalline CuInSe2 with different Cu/In ratios (0.49 - 1.1) were deposited on glass substrates by electrochemical methods. A structural transition exists for the electrodeposited CulnSe2, from a tetragonal to cubic structure as the film composition varies from copper rich to indium rich. CuInSe2 has a chalcopyrite structure with lattice constant = C/2 = 5.7 A. The SEM studies on these films showed that the grain size increases the Cu/In ratio increases from 0.49 to 1.1. The variation of the band gap with different Cu/In ratios was determined from optical absorption measurements. The results showed that the band gap decreases varies nonlinearly with different cu/In ratios.
Databáze:	OpenAIRE
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