title: Spray deposited copper zinc tin sulphide (Cu2ZnSnS4) film as a counter electrode in dye sensitized solar cells.
abstract: Stoichiometric thin films of Cu2ZnSnS4 (CZTS) were deposited by the spray technique on a FTO coated glass substrate, with post-annealing in a H2S environment to improve the film properties. CZTS films were used as a counter electrode (CE) in Dye-Sensitized Solar Cells (DSCs) with N719 dye and an iodine electrolyte. The DSC of 0.25 cm(2) area using a CE of CZTS film annealed in a H2S environment under AM 1.5G illumination (100 mW cm(-2)) exhibited a short circuit current density (JSC) = 18.63 mA cm(-2), an open circuit voltage (VOC) = 0.65 V and a fill factor (FF) = 0.53, resulting in an overall power conversion efficiency (PCE) = 6.4%. While the DSC using as deposited CZTS film as a CE showed the PCE = 3.7% with JSC = 13.38 mA cm(-2), VOC = 0.57 V and FF = 0.48. Thus, the spray deposited CZTS films can play an important role as a CE in the large area DSC fabrication.
authors.affiliation: Photovoltaic Laboratory, Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi-110016, India. swami.phy@gmail.com.
authors.forename: Sanjay Kumar
authors.initials: SK
authors.lastname: Swami
authors.forename: Neha
authors.initials: N
authors.lastname: Chaturvedi
authors.forename: Anuj
authors.initials: A
authors.lastname: Kumar
authors.forename: Nikhil
authors.initials: N
authors.lastname: Chander
authors.forename: Viresh
authors.initials: V
authors.lastname: Dutta
authors.forename: D Kishore
authors.initials: DK
authors.lastname: Kumar
authors.forename: A
authors.initials: A
authors.lastname: Ivaturi
authors.forename: S
authors.initials: S
authors.lastname: Senthilarasu
authors.forename: Hari M
authors.initials: HM
authors.lastname: Upadhyaya