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Title: Homogeneous photosensitization of complex TiO2 nanostructures for efficient solar energy conversion
Authors: Luo, Jingshan
Karuturi, Siva Krishna
Liu, Lijun
Su, Liap Tat
Fan, Hong Jin
Tok, Alfred Iing Yoong
Keywords: DRNTU::Science::Chemistry::Physical chemistry::Photochemistry
Issue Date: 2012
Source: Luo, J., Karuturi, S. K., Liu, L., Su, L. T., Tok, A. I. Y., & Fan, H. J. (2012). Homogeneous Photosensitization of Complex TiO2 Nanostructures for Efficient Solar Energy Conversion. Scientific Reports 2, 451.
Series/Report no.: Scientific reports
Abstract: TiO2 nanostructures-based photoelectrochemical (PEC) cells are under worldwide attentions as the method to generate clean energy. For these devices, narrow-bandgap semiconductor photosensitizers such as CdS and CdSe are commonly used to couple with TiO2 in order to harvest the visible sunlight and to enhance the conversion efficiency. Conventional methods for depositing the photosensitizers on TiO2 such as dip coating, electrochemical deposition and chemical-vapor-deposition suffer from poor control in thickness and uniformity, and correspond to low photocurrent levels. Here we demonstrate a new method based on atomic layer deposition and ion exchange reaction (ALDIER) to achieve a highly controllable and homogeneous coating of sensitizer particles on arbitrary TiO2 substrates. PEC tests made to CdSe-sensitized TiO2 inverse opal photoanodes result in a drastically improved photocurrent level, up to ~15.7 mA/cm2 at zero bias (vs Ag/AgCl), more than double that by conventional techniques such as successive ionic layer adsorption and reaction.
DOI: 10.1038/srep00451
Rights: © 2012 The Author(s). This paper was published in Scientific Reports and is made available as an electronic reprint (preprint) with permission of The Author(s). The paper can be found at the following official DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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