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Effect of copper salt and thiourea concentrations on the formation of Cu 2 ZnSnS 4 thin films by spray pyrolysis
Author(s) -
Kumar Y.B. Kishore,
Bhaskar P. Uday,
Babu G. Suresh,
Raja V. Sundara
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925194
Subject(s) - czts , kesterite , thin film , materials science , thiourea , crystallite , copper , chalcocite , solar cell , substrate (aquarium) , band gap , heterojunction , spray pyrolysis , chemical engineering , soda lime glass , inorganic chemistry , chalcopyrite , metallurgy , nanotechnology , chemistry , optoelectronics , composite material , oceanography , organic chemistry , geology , engineering
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.