Ni1−x Pt x (x=0–0.08) films as the photocathode of dye-sensitized solar cells with high efficiency
Ni1–xPtx ﬁ lms, chemical plating, nanoparticles, photocathode, dye-sensitized solar cells
Films of Ni1 xPtx (x=0, 0.02, 0.04, 0.06, and 0.08) have been prepared on ﬂuorine-doped tin oxide-coated (FTO) glass substrates by a chemical plating method and used as the photocathode for dye-sensitized solar cells (DSCs). The Ni0.94Pt0.06 film consisted of nanoparticles with a size of 4 6 nm and a Pt loading of 5.13 μg/cm2 . The Ni0.94Pt0.06 photocathode exhibited high catalytic performance toward triiodide reduction, high light reﬂ ectance, and low charge-transfer resistance. The DSC assembled with the Ni0.94Pt0.06 photocathode gave a short-circuit photocurrent density ( Jsc) of 16.79 mA/cm2 , an open-circuit photovoltage (Voc) of 736 mV, and a ﬁ ll factor (FF) of 66.4%, corresponding to an overall conversion efﬁ ciency of 8.21% under standard AM 1.5 irradiation (100 mW/cm2 ), which is higher than that for the DSC with a pure Pt photocathode obtained by conventional thermal decomposition. Furthermore, the DSC based on the Ni0.94Pt0.06 photocathode showed good stability. The results indicate that Ni0.94Pt0.06 ﬁ lms are promising low- cost and high-performance photocathodes for use in DSCs.
Tsinghua University Press
Shengjie Peng,Jifu Shi,Juan Pei,Yanliang Liang,Fangyi Cheng,Jing Liang,Jun Chen, Ni1−x Pt x (x=0–0.08) films as the photocathode of dye-sensitized solar cells with high efficiency. NanoRes.2009, 2: 484-492