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Surface-supported metal-organic framework thin film derived transparent CoS@N-doped carbon film as an efficient counter electrode for bifacial dye-sensitized solar cells.

08:00 EDT 1st April 2019 | BioPortfolio

Summary of "Surface-supported metal-organic framework thin film derived transparent CoS@N-doped carbon film as an efficient counter electrode for bifacial dye-sensitized solar cells."

The development of low-cost, efficient, and stable counter electrode materials for dye sensitized solar cells (DSSCs) is desirable but remains a great challenge. Herein, we report a facile in-situ method to fabricate transparent CoS anchored on N-doped carbon film electrode through sulfurization of cobalt-metalloporphyrin metal-organic framework thin film on fluorine doped tin oxide glass. As counter electrode in bifacial DSSCs, and a power conversion efficiency of 9.11% and 6.64% respectively from front and rear irradiation was achieved, which is higher than that of Pt counter electrode (8.04% and 5.87%). The uniformly dispersed CoS nanoparticles on N-doped carbon film provides large catalytic active area and facilitates the electron transfer, which leads to the excellent catalytic ability of the CoS@N-doped carbon film. In addition, the in-situ preparation of the uniform film with nanosheet structure offers high electrical conductivity and unobstructed access for the diffusion of triiodide to available electroactive sites, resulting in excellent device performance. The transparent CoS@N-doped carbon film exhibited superior long-term stability even after 1000 h under natural conditions, which supports its application as an alternative counter electrode for substitution of Pt counter electrode in DSSCs.

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This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
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