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Effect of copper salt and thiourea concentrations on the formation of Cu2ZnSnS4thin films by spray pyrolysis

✍ Scribed by Kumar, Y.B. Kishore ;Bhaskar, P. Uday ;Babu, G. Suresh ;Raja, V. Sundara

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
679 KB
Volume
207
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Thin films of Cu~2~ZnSnS~4~ (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 (T~s~) of 643 K. The effect of copper salt and thiourea concentrations on the formation of Cu~2~ZnSnS~4~ 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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