Enhanced photovoltaic performance of CdS quantum dots sensitized highly oriented two-end-opened TiO₂ nanotubes array membrane

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• 作者：Sheng Gao ; Junyou Yang ; Ming Liu ; Hongzhou Yan ; Weixin Li ; Jiaqi Zhang ; Yubo Luo
• 关键词：Titanium oxide ; Two-end-opened structure ; Cadmium sulfide ; Power conversion efficiency
• 刊名：Journal of Power Sources
• 出版年：15 March, 2014
• 年：2014
• 卷：250
• 期：Complete
• 页码：174-180
• 全文大小：3024 K

文摘

CdS quantum dots (QDs) sensitized highly oriented two-end-opened TiO₂ nanotubes array membrane solar cells have been fabricated in this paper. The structure, morphology and composition of the photoanodes have been characterized by XRD, SEM, TEM and EDX, respectively. It shows that the flow-through structure of two-end-opened TiO₂ nanotubes can absorb more CdS nanoparticles uniformly and prevent them from clogging at the nozzles of the nanotubes. The UV-Vis adsorption spectra also indicate that the CdS sensitized two-end-opened TiO₂ nanotubes have high absorbance than that of the closed-ended nanotubes. The photovoltaic parameters of the QDSSC based on the two-end-opened nanotubes array membrane are as follows: PCE聽=聽1.64%, J_sc聽=聽4.91聽mA聽cm^鈭?, V_oc聽=聽0.62聽V and FF聽=聽54.3%. The PCE value of 1.64% is about 3-fold enhanced in comparison with that of the QDSSC based on the closed-ended TiO₂ nanotubes array membrane.