Effect of copper salt and thiourea concentrations on the formation of Cu2ZnSnS4 thin films by spray pyrolysis

Physica Status Solidi (A) Applications and Materials Science - Tập 207 Số 1 - Trang 149-156 - 2010
P. Uday Bhaskar1, G. Suresh Babu1, V. Sundara Raja1
1Solar Energy Laboratory, Department of Physics, Sri Venkateswara University, Tirupati 517 502, India

Tóm tắt

Abstract

Thin films of Cu2ZnSnS4 (CZTS), a potential candidate for absorber layer in thin film heterojunction solar cell, have been deposited by spray pyrolysis technique onto soda‐lime glass substrates held at a substrate temperature (Ts) of 643 K. The effect of copper salt and thiourea concentrations on the formation of Cu2ZnSnS4 thin films is investigated. CZTS films formed under optimized conditions are found to be polycrystalline in nature with kesterite structure. The lattice parameters are found to be a = 0.543 nm and c = 1.086 nm. The optical band gap of these films is found to be 1.43 eV. It is found to increase with decrease in copper salt concentration in the solution.

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Thông tin xuất bản

Physica Status Solidi (A) Applications and Materials Science

Tập 207 Số 1

149-156

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