Materials, Photonic Devices, and Sensors

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

[+] Author Affiliations
Jun Luo, Pan Pang, Bin Liao, Wu Xianying, Xu Zhang

Beijing Normal University, College of Nuclear Science and Technology, Key Laboratory for Radiation Beam Technology and Material Modification of Ministry of Education, No. 12, Xue Ruan southern road, HaiDian District, Beijing 100875, China

Opt. Eng. 55(6), 067107 (Jun 24, 2016). doi:10.1117/1.OE.55.6.067107
History: Received May 10, 2016; Accepted June 9, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jun Luo ; Pan Pang ; Bin Liao ; Wu Xianying and Xu Zhang
"Fe-ions implantation to modify TiO2 trilayer films for dye-sensitized solar cells", Opt. Eng. 55(6), 067107 (Jun 24, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.067107


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