Fe-ions implantation to modify TiO2 trilayer films for dye-sensitized solar cells

作者：Luo, Jun; Pang, Pan; Liao, Bin; Wu Xianying; Zhang, Xu^*

来源：Optical Engineering, 2016, 55(6): 067107.

DOI：10.1117/1.OE.55.6.067107

• ion implantation
• conversion efficiency
• TiO2
• light harvesting
• dye-sensitized solar cells

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 x 10(15) atom/cm(2). 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.

• 出版日期2016-6
• 单位北京师范大学