24 June 2016 Fe-ions implantation to modify TiO2 trilayer films for dye-sensitized solar cells
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Abstract
A series of Fe-doped TiO2 trilayer films were prepared successfully by using the ion-implantation technique. The aim of the ion implantation was to enhance charge transfer and to reduce charge recombination. A maximum conversion efficiency of 4.86% was achieved in cells using Fe-ion-implanted electrodes with the illumination of 6×1015  atom/cm2. It is 14.1% higher than that of the cells without ion implantations. The significant improvement in conversion efficiency by Fe-ion implantation could be contributed to the enhancement of dye uptake and charge transfer, as indicated from the incident photon-to-collected electron conversion efficiency and ultraviolet-visible measurements. Furthermore, the implanted Fe-ions introduce impurity levels in the bandgap of TiO2, and this improves the electron injection efficiency from lowest unoccupied molecular orbital of excited N719 into the conduction band of TiO2.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jun Luo, Pan Pang, Bin Liao, Wu Xianying, Xu Zhang, "Fe-ions implantation to modify TiO2 trilayer films for dye-sensitized solar cells," Optical Engineering 55(6), 067107 (24 June 2016). https://doi.org/10.1117/1.OE.55.6.067107 . Submission:
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