Novel fabrication of TiO2/ZnO nanotube array heterojunction for dye-sensitized solar cells

作者：Ren Jiangbo; Que Wenxiu^*; Yin Xingtian; He Yucheng; Javed H M Asif

来源：RSC Advances, 2014, 4(15): 7454-7460.

DOI：10.1039/c3ra45741a

• Dye-Sensitized solar cell
• Dye-sensitized solar cells
• Electro-chemical anodization
• Electron recombinations
• Electron transport
• Fluorine doped tin oxide
• Photo-electric conversion efficiency
• Recombination rate

TiO2 nanotube arrays (TNTs) were prepared by using an electrochemical anodization method, and then the detached TNTs were successfully transferred onto a fluorine-doped tin oxide glass substrate with the help of a tetrabutyl titanate-containing sol. In order to improve the photoelectric conversion efficiency (PCE) of the as-fabricated dye-sensitized solar cells (DSSCs), an easily-operated immersing method was employed to fabricate a TiO2/ZnO nanotube array (TNT/ZnO) heterojunction, which has advantages of a high aspect ratio, low recombination rate and high absorption of visible light. The results indicate that under AM 1.5 illumination, the DSSCs based on the TNT/ZnO heterojunction exhibit a better short circuit current density (J(sc)) of 8.67 mA cm(-2) and a higher PCE of 3.98%. Electrochemical impedance spectroscopy analysis shows that the TNT/ZnO heterojunction-based DSSCs have optimized properties, such as a longer electron lifetime, lower impedance of electron transport, higher impedance of electron recombination, and electron collecting rate as high as 95.2%.

• 出版日期2014
• 单位西安交通大学