TY - JOUR
T1 - Bilayer hollow/spindle-like anatase TiO2 photoanode for high efficiency dye-sensitized solar cells
AU - Wang, Guanxi
AU - ZHU, Xunjin
AU - Yu, Jiaguo
N1 - Funding Information:
This work was partially supported by the 973 program ( 2013CB632402 ), NSFC ( 51320105001 , 51372190 21433007 and 51272199 ), Deanship of Scientific Research (DSR) of King Abdulaziz University ( 90-130-35-HiCi ), Fundamental Research Funds for the Central Universities (WUT: 2014-VII-010 ) and Self-determined and Innovative Research Funds of SKLWUT ( 2013-ZD-1 ). Dr. Zhu thanks the financial support from Hong Kong Baptist University (Grants FRG2/12-13/050 ).
PY - 2015/3/15
Y1 - 2015/3/15
N2 - Derived from a hollow TiO2 nanoparticle (HNP) as underlayer and a TiO2 spindle (SP) as light scattering overlayer, a new bilayer single-crystalline photoanode (HNP/SP) is fabricated for dye-sensitized solar cell (DSSC) application. The prepared bilayer TiO2 photoanode and two comparative HNP/HNP and SP/SP ones are fully characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy and N2 adsorption-desorption isotherms. An overall photoelectric conversion efficiency of 8.65% has been achieved for HNP/SP DSSC, which is 25% higher than that of HNP/HNP DSSC, and also far superior to that of SP/SP or conventional P25 DSSC. The improved photovoltaic performance of HNP/SP DSSC is attributed to the synergic effects, i.e. the single-crystalline bilayer structure favoring for rapid interfacial electron transport, the relatively large specific surface area of HNP for effective dye adsorption, and the 1D geometry of single-crystalline TiO2 spindles for direct electron transport pathway and strong light scattering effect.
AB - Derived from a hollow TiO2 nanoparticle (HNP) as underlayer and a TiO2 spindle (SP) as light scattering overlayer, a new bilayer single-crystalline photoanode (HNP/SP) is fabricated for dye-sensitized solar cell (DSSC) application. The prepared bilayer TiO2 photoanode and two comparative HNP/HNP and SP/SP ones are fully characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy and N2 adsorption-desorption isotherms. An overall photoelectric conversion efficiency of 8.65% has been achieved for HNP/SP DSSC, which is 25% higher than that of HNP/HNP DSSC, and also far superior to that of SP/SP or conventional P25 DSSC. The improved photovoltaic performance of HNP/SP DSSC is attributed to the synergic effects, i.e. the single-crystalline bilayer structure favoring for rapid interfacial electron transport, the relatively large specific surface area of HNP for effective dye adsorption, and the 1D geometry of single-crystalline TiO2 spindles for direct electron transport pathway and strong light scattering effect.
KW - Dye-sensitized solar cells
KW - Hollow nanoparticles
KW - Single-crystalline bilayer photoanode
KW - Spindles
KW - Titanium dioxide
UR - http://www.scopus.com/inward/record.url?scp=84921377582&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2014.12.091
DO - 10.1016/j.jpowsour.2014.12.091
M3 - Journal article
AN - SCOPUS:84921377582
SN - 0378-7753
VL - 278
SP - 344
EP - 351
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
