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: jlshie@niu.edu.tw, ali99281@hotmail.com).
Chiu-HsuanLee and Ching-Yuan Chang are with the Graduate Institute of
Environmental Engineering, National Taiwan University, Taiwan (e-mail:
D01541003@ntu.edu.tw, cychang3@ntu.edu.tw).
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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.
