Boron and Nitrogen Codoped Multilayer Graphene as a Counter Electrode: A Combined Theoretical and Experimental Study on Dye-Sensitized Solar Cells under Ambient Light Conditions

Understanding the reactivity of boron and nitrogen codoped graphene (BNG) under the charged environment is essential in developing Pt-free counter electrode materials in the dye-sensitized solar cells (DSSCs). In this study, we have calculated the I2 molecule adsorption and its dissociation on the n...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2021-11, Vol.125 (45), p.24894-24901
Main Authors: Lin, Kuan-Yu, Cai, Ming-Quan, Wu, Yu-Ting, Yeh, Min-Hsin, Jiang, Jyh-Chiang
Format: Article
Language:English
Subjects:
C: Chemical and Catalytic Reactivity at Interfaces
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Summary:Understanding the reactivity of boron and nitrogen codoped graphene (BNG) under the charged environment is essential in developing Pt-free counter electrode materials in the dye-sensitized solar cells (DSSCs). In this study, we have calculated the I2 molecule adsorption and its dissociation on the negatively charged single-layer and multilayer BNG sheets to elucidate the charge effects on the BNG sheets’ electrocatalytic activity. Compared with Pt, the multilayer BNG sheet can easily achieve the desorption of I* anions at low charge density and thereby further promotes the overall reaction rate of the I3 – reduction under dim light illumination. Also, our photovoltaic experiments of DSSCs with B and N codoped graphene quantum dots (BN-GQDs) support our computational results, which advances high-efficiency DSSCs under the ambient light environment (∼5000 lux).
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.1c06646