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Author |
Ibarra-Barreno, C.M.; Chowdhury, S.; Crosta, M.; Zehra, T.; Fasano, F.; Kundu, P.; Verstraelen, J.; Bals, S.; Subrati, M.; Bonifazi, D.; Costa, R.D.; Rudolf, P. |
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Title |
Bottom-up fabrication of BN-doped graphene electrodes from thiol-terminated borazine molecules working in solar cells |
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A1 Journal article |
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Year  |
2025 |
Publication |
ACS applied materials and interfaces |
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Volume |
17 |
Issue |
15 |
Pages |
23062-23075 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
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Abstract |
Graphene exhibits exceptional properties, including high tensile strength, mechanical stiffness, and electron mobility. Chemical functionalization of graphene with boron and nitrogen is a powerful strategy for tuning these properties for specific applications. Molecular self-assembly provides an efficient pathway for the tailored synthesis of doped graphene, depending on the molecular precursor used. This study presents a scalable approach to synthesizing large-area boron- and nitrogen-doped graphene using two borazine precursors bearing thiol functionalities. After self-assembly on electropolished polycrystalline copper foil, the precursors undergo photopolymerization under UV irradiation, and subsequent annealing in vacuum transforms the cross-linked BN-doped layer into a graphenoid structure. X-ray photoelectron spectroscopy confirms the integration of the borazine rings into the BNC architecture, while Raman spectroscopy reveals a red shift in the characteristic G bands along with intense and broad D bands, highlighting boron-nitrogen contributions. Transmission electron microscopy provides insight into the morphology and structural quality of the BNC films. The BNC films were successfully integrated as counter electrodes in dye-sensitized solar cells, achieving a power conversion efficiency of up to 6% under 1 sun illumination and 11.8% under low-intensity indoor ambient light. Hence, this work not only establishes a straightforward, controllable route for heteroatom doping but also introduces a novel concept of Pt-free counter electrodes for efficient indoor energy harvesting applications. |
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WOS:001457678400001 |
Publication Date |
2025-04-02 |
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ISSN |
1944-8244 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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no |
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Call Number |
UA @ admin @ c:irua:213919 |
Serial |
9411 |
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