A low cost technique has been introduced to fabricate the absorber layer of a solar cell. Copper Zinc Tin Sulfide (Cu2ZnSnS4 or CZTS) thin film have been deposited on soda lime glass substrates by a spin coater and annealed in air with different temperature varied from 300-500° C. The effect of annealing temperature on structural, optical, electrical, morphological and compositional properties has been studied. The XRD study depicts that sharpness of the peak increases with annealing temperature. The major peaks are observed at 28.74o, 47.7o and 56.6o with (112), (220) and (312) plane. Optical studies show relatively high absorption co-efficient from 104-105 cm-1. The band gap energy (Eg) varies from 1.42 to 1.49 eV for CZTS thin film. Hall measurements show p type conductivity. Further, SEM analysis revealed the surface texture of CZTS film. The EDX measurement for CZTS thin films confirms the formation of CZTS which is Cu rich and Zn poor.
Sharmin, Afrina; S. Bashar, M.; Tabassum, Samia; and Hasan Mahmood, Zahid
"Low Cost and Sol-Gel Processed Earth Abundant Cu2ZnSnS4 Thin Film as an Absorber Layer for Solar Cell: Annealing without Sulfurization,"
International Journal of Thin Film Science and Technology: Vol. 8
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Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol8/iss2/7