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Article

Tellurium-Doped, Mesoporous Carbon Nanomaterials as Transparent Metal-Free Counter Electrodes for High-Performance Bifacial Dye-Sensitized Solar Cells

Global GET-Future Lab. & Department of Advanced Materials Chemistry, Korea University, 2511 Sejong-ro, Sejong 339-700, Korea
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Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(1), 29; https://doi.org/10.3390/nano10010029
Received: 21 November 2019 / Revised: 16 December 2019 / Accepted: 17 December 2019 / Published: 20 December 2019
Tellurium-doped, mesoporous carbon nanomaterials with a relatively high doping level were prepared by a simple stabilization and carbonization method in the presence of a tellurium metalloid. A transparent counter electrode (CE) was prepared using tellurium-doped, mesoporous carbon (TeMC) materials, and was directly applied to bifacial, dye-sensitized solar cells (DSSCs). To improve the performance of the bifacial DSSC device, CEs should have outstanding electrocatalytic activity, electrical conductivity, and electrochemical stability, as well as high transparency. In this study, to make transparent electrodes with outstanding electrocatalytic activity and electrical conductivity, various TeMC materials with different carbonization temperatures were prepared by simple pyrolysis of the polyacrylonitrile-block-poly (n-butyl acrylate) (PAN-b-PBA) block copolymer in the presence of the tellurium metalloid. The electrocatalytic activity of the prepared TeMC materials were evaluated through a dummy cell test, and the material with the best catalytic ability was selected and optimized for application in bifacial DSSC devices by controlling the film thickness of the CE. As a result, the bifacial DSSC devices with the TeMC CE exhibited high power conversion efficiencies (PCE), i.e., 9.43% and 8.06% under front and rear side irradiation, respectively, which are the highest values reported for bifacial DSSCs to date. Based on these results, newly-developed transparent, carbon-based electrodes may lead to more stable and effective bifacial DSSC development without sacrificing the photovoltaic performance of the DSSC device. View Full-Text
Keywords: dye-sensitized solar cells; counter electrodes; bifacial devices; tellurium-doped mesoporous carbon; transparency dye-sensitized solar cells; counter electrodes; bifacial devices; tellurium-doped mesoporous carbon; transparency
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MDPI and ACS Style

Kim, C.K.; Ji, J.-M.; Zhou, H.; Lu, C.; Kim, H.K. Tellurium-Doped, Mesoporous Carbon Nanomaterials as Transparent Metal-Free Counter Electrodes for High-Performance Bifacial Dye-Sensitized Solar Cells. Nanomaterials 2020, 10, 29. https://doi.org/10.3390/nano10010029

AMA Style

Kim CK, Ji J-M, Zhou H, Lu C, Kim HK. Tellurium-Doped, Mesoporous Carbon Nanomaterials as Transparent Metal-Free Counter Electrodes for High-Performance Bifacial Dye-Sensitized Solar Cells. Nanomaterials. 2020; 10(1):29. https://doi.org/10.3390/nano10010029

Chicago/Turabian Style

Kim, Chang K., Jung-Min Ji, Haoran Zhou, Chunyuan Lu, and Hwan K. Kim. 2020. "Tellurium-Doped, Mesoporous Carbon Nanomaterials as Transparent Metal-Free Counter Electrodes for High-Performance Bifacial Dye-Sensitized Solar Cells" Nanomaterials 10, no. 1: 29. https://doi.org/10.3390/nano10010029

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