Grafting cobalt sulfide on graphene nanosheets as a counterelectrode for dye-sensitized solar cells

• Published in: Journal of alloys and compounds Vol. 808; p. 151701
• Main Authors: Rahman, Mati Ur, Xie, Fengyan, Li, Yafeng, Sun, Xun, Wei, Mingdeng
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.11.2019; Elsevier BV
• Subjects: Chemical reduction; Cobalt sulfide; Counterelectrode; Dye-sensitized solar cell; Dye-sensitized solar cells; Electrodes; Energy conversion efficiency; Grafting; Graphene; Graphene nanosheets; Nanoparticles; Nanosheets; Photovoltaic cells; Photovoltaic performance; Dye-sensitized solar cell; Graphene nanosheets; Counterelectrode; Cobalt sulfide; Photovoltaic performance
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.151701

In the present work a composite counter electrode of graphene nanosheets grafted cobalt sulfide was fabricated through a facile synthetic route, in which cobalt sulfide nanoparticles were successfully grafted on the surface of graphene nanosheets. Used as a counter electrode in DSSC, a power conversion efficiency of 7.28% can be achieved. Such a result might be contributed to the facts that this counter electrode composed of graphene nanosheets grafted cobalt sulfide has a good stability and electrochemical catalytic performance toward triiodide reduction reaction. •CoS@Gns was firstly employed as a counterelectrode in DSSCs.•DSSCs based on the CoS@Gns CE achieved the best efficiency of 7.28%.•This composite improved electrochemical catalytic performance toward I3− reduction.