Designing Multifunctional Co and Fe Co-Doped MoS2 Nanocube Electrodes for Dye-Sensitized Solar Cells, Perovskite Solar Cells, and a Supercapacitor

Chang Xu; Wenlu Yang; Jiaxin Zhao; Jingyuan Ma; Mingxing Wu

doi:10.1021/acsomega.1c03798

Designing Multifunctional Co and Fe Co-Doped MoS₂ Nanocube Electrodes for Dye-Sensitized Solar Cells, Perovskite Solar Cells, and a Supercapacitor

ACS Omega. 2021 Sep 17;6(38):24931-24939. doi: 10.1021/acsomega.1c03798. eCollection 2021 Sep 28.

Authors

Chang Xu¹, Wenlu Yang¹, Jiaxin Zhao¹, Jingyuan Ma¹, Mingxing Wu¹

Affiliation

¹ Hebei Key Laboratory of Inorganic Nanomaterials, College of Chemistry and Material Science, Hebei Normal University, No. 20 Rd. East of 2nd Ring South, Yuhua District, Shijiazhuang City, Hebei Province 050024, China.

Abstract

In the present study, three types of specific solid, core-shell, and hollow structured cobalt and iron co-doped MoS₂ nanocubes (denoted as s-Co-Fe-MoS _x , c-Co-Fe-MoS _x , and h-Co-Fe-MoS _x ) are controllably synthesized for the first time by regulating the reactant mass ratios. The prepared Co-Fe-MoS _x nanocubes can function as a counter electrode in dye-sensitized and perovskite solar cells (DSCs and PSCs) and a working electrode in a supercapacitor. In the DSC system, the c-Co-Fe-MoS _x nanocubes exhibit the maximum catalytic activity to the Co^3+/2+ redox couple regeneration, and the device achieves a power conversion efficiency (PCE) of 8.69%, significantly higher than the devices using s-Co-Fe-MoS _x (6.61%) and h-Co-Fe-MoS _x (7.63%) counter electrodes. Similarly, all of the prepared Co-Fe-MoS _x nanocubes show decent activity in PSCs and the device using the c-Co-Fe-MoS _x counter electrode achieves the highest PCE of 6.88%. It is worth noting that, as the supercapacitor working electrode, the h-Co-Fe-MoS _x exhibits a specific capacitance of 85.4 F g^-1, significantly higher than the parallel values achieved by the s-Co-Fe-MoS _x and c-Co-Fe-MoS _x electrodes under identical conditions.