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Abstract
CIGS nanoparticles ink with composition of Cu (Ga0.3 In0.7) Se2 was prepared by using dissolved copper, indium, gallium acetylacetonate, and Se powder in oleylamine using hot injection methods. The structural properties of the CIGS films deposited on the polyethylene terephthalate (PET) substrate were studied using an X-ray diffraction technique. The as-deposited CIGS films were found to be a chalcopyrite-type structure with crystallite grain size of about 43.8 nm. An optical study shows that the band-gap energy of the CIGS film is 1.25 eV. The flexible CIGS solar cell on a PET substrate with the best conversion efficiency of 4.21% is demonstrated.
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Acknowledgments
This project was supported by the Nano-Optoelectronic Research Laboratory (N.O.R.), the School of Physics, Universiti Sains Malaysia (USM), under Grant No. 1001/PFIZIK/814010. The authors would also like to acknowledge help from the School of Chemical Sains (USM).
