TiO2 nanocrystals coated rutile nanorod microspheres as the scattering layers for dye-sensitized solar cells

Mengyu Gao; Hongzhi Wang; Yaogang Li; Qinghong Zhang

doi:10.1117/12.2053207

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16 December 2013 TiO₂ nanocrystals coated rutile nanorod microspheres as the scattering layers for dye-sensitized solar cells

Mengyu Gao, Hongzhi Wang, Yaogang Li, Qinghong Zhang

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Proceedings Volume 9068, Eighth International Conference on Thin Film Physics and Applications; 906810 (2013) https://doi.org/10.1117/12.2053207
Event: Eighth International Conference on Thin Film Physics and Applications (TFPA13), 2013, Shanghai, China

Abstract

Anatase TiO₂ nanocrystals were deposited on the rutile TiO₂ nanorod microspheres (NCRNMs) via the controlled hydrolysis and condensation of titanium (IV) bis(ammonium lactato) dihydroxide (TALH) in the presence of polyethyleneimine (PEI). The anatase TiO₂ nanocrystals prevented the growth of rutile TiO₂ nanorod microspheres from sintering process. By coating of anatase nanocrystals, the decreasing of specific surface area of rutile TiO₂ nanorod microspheres (RNMs) were efficiently inhibited. The specific surface area of NCRNM was 47.0 m²/g after sintering at 500 °C，which was 50% increment compared to RNM. The dye sensitized solar cells (DSSCs) were assembled using the semitransparent underlayers and NCRNM scattering layers as the photoanodes. The incident photon to current conversion efficiency (IPCE) analysis showed the DSSCs in the presence of NCRNMs adsorbed more dye molecules while kept a high light-harvesting efficiency. The cell covered with the NCRNM scattering layer had the efficiency of 7.33%, which was 20% increment compared to that of the absence one.

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Mengyu Gao, Hongzhi Wang, Yaogang Li, and Qinghong Zhang "TiO₂ nanocrystals coated rutile nanorod microspheres as the scattering layers for dye-sensitized solar cells", Proc. SPIE 9068, Eighth International Conference on Thin Film Physics and Applications, 906810 (16 December 2013); https://doi.org/10.1117/12.2053207

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