Platinum-free counter electrode comprised of metal-organic-framework (MOF)-derived cobalt sulfide nanoparticles for efficient dye-sensitized solar cells (DSSCs)

Shao Hui Hsu, Chun Ting Li, Heng Ta Chien, Rahul R. Salunkhe, Norihiro Suzuki, Yusuke Yamauchi, Kuo Chuan Ho, Kevin C.W. Wu*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

154 引文 斯高帕斯(Scopus)

摘要

We fabricated a highly efficient (with a solar-to-electricity conversion efficiency (η) of 8.1%) Pt-free dye-sensitized solar cell (DSSC). The counter electrode was made of cobalt sulfide (CoS) nanoparticles synthesized via surfactant-assisted preparation of a metal organic framework, ZIF-67, with controllable particle sizes (50 to 320 nm) and subsequent oxidation and sulfide conversion. In contrast to conventional Pt counter electrodes, the synthesized CoS nanoparticles exhibited higher external surface areas and roughness factors, as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM) element mapping, and electrochemical analysis. Incident photon-to-current conversion efficiency (IPCE) results showed an increase in the open circuit voltage (V OC) and a decrease in the short-circuit photocurrent density (Jsc) for CoS-based DSSCs compared to Pt-based DSSCs, resulting in a similar power conversion efficiency. The CoS-based DSSC fabricated in the study show great potential for economically friendly production of Pt-free DSSCs.

原文英語
文章編號6983
期刊Scientific reports
4
DOIs
出版狀態已發佈 - 2014
對外發佈

ASJC Scopus subject areas

  • 多學科

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