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    • ISSN: 1793-821X
    • Frequency: Quarterly (2013-2014); Bimonthly (Since 2015)
    • DOI: 10.18178/JOCET
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School of Science and Technology Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all authors, reviewers and edtors.
JOCET 2014 Vol.2(1): 38-42 ISSN: 1793-821X
DOI: 10.7763/JOCET.2014.V2.87

Photoelectrochemical Characteristics of N-and S-doped TiO2 with Coumarin

Chiu-Hsuan Lee, Je-Lueng Shie, Ching-Yi Tsai, and Ching-Yuan Chang
Abstract—This study investigated the photoelectronchemical characteristics of dye-sensitized N- and S-doped TiO2 (TiNxO2-xSy) with coumarin using visible light emitting diode (VLED).N- and S-doped TiO2was prepared bytitanium sulfate (Ti(SO4)2) and ammonia (NH3). TiO2 and TiNxO2-xSy films on indium-doping tin oxide (ITO) promoted with nature organic sensitizers of coumarin (C9H6O2) were prepared by precipitation method. The HRSEM, UV/Vis absorption spectra, Elemental Analyses andBET surface area of dye-sensitizedNand S-doped TiO2 as well as I-V curve test of TiNxO2-xSy solar cell (TNSSC)dye-sensitizedwith and without coumarin (CONSDSSC and CODSSC, respectively)under the irradiation of visible light lamp (VLL),blue light emitting light (BLED), white LED (WLED)andred LED (RLED) were measured.All the values of I-V curve ofCONSDSSC are larger than those of CODSSC. The maximum power (Pmax) was 4.81 μWfor CONSDSSC under VLL and it was larger than that of CODSSC under VLL almost 17.8 times.This result shows that the TiNxO2-x solar cell dyedwith coumarin can largely increase the photoelectronchemical characteristics and the absorption light wavelength is changedto visible light range with red shift obviously. All the results obtained from this study can apply for the design of indoor dye sensitized solar cell (DSSC) with indoor light sources.

Index Terms—Dye sensitized solar cell (DSSC), coumarin, light emitting diode (LED), N-doped TiO2, photoelectrochemical characteristics.

Je-Lueng Shie and Ching-Yi Tsai are with the Department of Environmental Engineering, National I-Lan University, I-Lan, Taiwan (e-mail:,
Chiu-HsuanLee and Ching-Yuan Chang are with the Graduate Institute of Environmental Engineering, National Taiwan University, Taiwan (e-mail:,


Cite:Chiu-Hsuan Lee, Je-Lueng Shie, Ching-Yi Tsai, and Ching-Yuan Chang, "Photoelectrochemical Characteristics of N-and S-doped TiO2 with Coumarin," Journal of Clean Energy Technologies vol. 2, no. 1, pp. 38-42, 2014.

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