Cost effective synthesis Co9S8/Ni9S8 loaded on nitrogen doped porous carbons high efficiency counter electrode materials for liquid thin film solar cells. (10th December 2021)

• Record Type: Journal Article
• Authors: Zhao, Kaifeng; Zhao, Youwei; Hao, Menghui; Li, Xiaoting; Liu, Shuang; Li, Ling; Zhang, Wenming
• Is Part Of: Electrochimica acta. Volume 399(2021)
• Publication Date: 2021-12-10
• Subjects: Dye-sensitized solar cells: Counter electrode -- Metal-organic framework -- Co9S8/Ni9S8@C-N; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2021.139441
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Synthesis of non-precious metal materials with cost-effective and excellent electrocatalytic activity as counter electrode (CE) of dye-sensitized solar cells (DSSCs) remains a challenge. Herein, MOF-based self-sustaining template and ion exchange method are developed to fabricate Co9 S8 and Ni9 S8 loaded on N-doped porous carbon nanocage materials (Co9 S8 /Ni9 S8 @C-N) with large specific surface area and remarkable catalytic activities to the reduction of I3 − ions. The excellent performance of Co9 S8 /Ni9 S8 @C-N is owing to the synergistic effect of Ni9 S8 and Co9 S8 can further improve the catalytic activity and N-doped porous carbon nanocage as a good conductor provides a suitable place for the redox reaction and guarantees the stability of the material. As a CE catalytic material, Co9 S8 /Ni9 S8 @C-N reveals excellent catalytic activity and stability, making the photoelectric conversion efficiency (PCE) 17.54% higher than Pt CE. The Co9 S8 /Ni9 S8 @C-N composite material reveals the remarkable potential as a CE in the DSSCs.