title: One-pot electrodeposition, characterization and photoactivity of stoichiometric copper indium gallium diselenide (CIGS) thin films for solar cells.
abstract: Herein we report the one-pot electrodeposition of copper indium gallium diselenide, CuIn(1-x)Ga(x)Se(2) (CIGS), thin films as the p-type semiconductor in an ionic liquid medium consisting of choline chloride/urea eutectic mixture known as Reline. The thin films were characterized by scanning electron microscopy with energy dispersive X-ray analysis, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman microspectroscopy, and UV-visible spectroscopy. Based on the results of the characterizations, the electrochemical bath recipe was optimized to obtain stoichiometric CIGS films with x between 0.2 and 0.4. The chemical activity and photoreactivity of the optimized CIGS films were found to be uniform using scanning electrochemical microscopy and scanning photoelectrochemical microscopy. Low-cost stoichiometric CIGS thin films in one-pot were successfully fabricated.
authors.affiliation: Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Harati
authors.forename: Jia
authors.initials: J
authors.lastname: Jia
authors.forename: Kévin
authors.initials: K
authors.lastname: Giffard
authors.forename: Kyle
authors.initials: K
authors.lastname: Pellarin
authors.forename: Carly
authors.initials: C
authors.lastname: Hewson
authors.forename: David A
authors.initials: DA
authors.lastname: Love
authors.forename: Woon Ming
authors.initials: WM
authors.lastname: Lau
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Ding