SPLTRAK Abstract Submission
Grain Enhancement in Polycrystalline CuGaSe2 by AgBr Vapor Treatment
Deewakar Poudel1, Benjamin Belfore1, Adam Masters1, Elizabeth Palmiotti2, Angus Rockett2, Sylvain Marsillac1
1Virginia Institute of Photovoltaics, Old Dominion University, Norfolk, VA, United States
/2Dept. of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO, United States

Copper Gallium diselenide (CuGaSeor CGS) thin film were deposited using a three-stage thermal co-evaporation process on molybdenum coated soda lime glass. Recrystallization was carried after the second stage by flashing AgBr for 2 mins. The change in morphology, structure and depth profile were studied after the treatment. SEM and XRD showed an increase in grain size and enhanced crystallinity. A decrease in sodium profile after the treatment was observed through SIMS measurements. Overall, AgBr treatment of CGS seems to be promising for the improvement of film quality, which could help with enhanced device fabrication in the future.