title: Growth of Cu2ZnSnS4 Nanocrystallites on TiO2 Nanorod Arrays as Novel Extremely Thin Absorber Solar Cell Structure via the Successive-Ion-Layer-Adsorption-Reaction Method.
abstract: Cu2ZnSnS4 (CZTS) is an environmentally benign semiconductor with excellent optoelectronic properties that attracts a lot of interest in thin film photovoltaics. In departure from that conventional configuration, we fabricate and test a novel absorber-conductor structure featuring in situ successive-ion-layer-adsorption-reaction (SILAR)-deposited CZTS nanocrystallites as a light absorber on one-dimensional TiO2 (rutile) nanorods as an electron conductor. The effectiveness of the nanoscale heterostructure in visible light harvesting and photoelectron generation is demonstrated with an initial short circuit current density of 3.22 mA/cm(2) and an internal quantum efficiency of ∼60% at the blue light region, revealing great potential in developing CZTS extremely thin absorber (ETA) solar cells.
authors.affiliation: Materials Engineering, McGill University , 3610 University Street, Montreal, Quebec Canada H3A 0C5.
authors.forename: Zhuoran
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Materials Engineering, McGill University , 3610 University Street, Montreal, Quebec Canada H3A 0C5.
authors.forename: George P
authors.initials: GP
authors.lastname: Demopoulos
keywords: Cu2ZnSnS4 nanocrystallites; ETA solar cells; TiO2 nanorods; heterostructure; solution processing