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Authors
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Eglitis, R.; Timusk, M.; Das, A.; Šutka, A.
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Title
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The photoelectrochromic performance of a Nb-doped TiO2 colloid in DMF
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Date
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01.10.2025
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Number
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0
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Abstract
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Effective systems controlling light transmittance are essential for energy management regarding reduced energy consumption and for providing on-demand switchable privacy functions in buildings. Here, we report a photoelectrochromic device based on Nb-doped TiO2 nanoparticles in N,N-dimethylformamide (DMF) sandwiched between two ITO-coated glass panes. Nb-doped TiO2 nanoparticles allow selective control of the light absorption in the IR spectral range, leaving the visible range less affected. Upon irradiation under open circuit (OC) conditions, the transmittance change in the visible wavelength range of 400–700 nm was 59.0 ± 4.1 %, whereas, in the near-infrared wavelength range of 700–950 nm, it was 80.0 ± 2.9 % within 3 min of irradiation. This was achieved by irradiating the sample with UVA (365 nm) light. The recovery rate of photo-irradiated colloids can be modulated by applying an alternating electrical voltage. This allows for an increase in the recovery rate by several orders of magnitude.
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Publisher
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Elsevier
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Wikidata
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Citation
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Journal of Photochemistry and Photobiology A: Chemistry 467 (2025) 116406
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DOI
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https://doi.org/10.1016/j.jphotochem.2025.116406
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