Double-sided transparent electrodes of TiO2 nanotube arrays for highly efficient CdS quantum dot-sensitized photoelectrodes |
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| Authors: | Chong Chen Fumin Li Guoqiang Li Furui Tan Shengjun Li Lanyu Ling |
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| Affiliation: | 1. Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, People’s Republic of China
2. School of Physics and Electronics, Henan University, Kaifeng, 475004, People’s Republic of China
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| Abstract: | A novel double-sided CdS quantum dots-sensitized TiO2 nanotube (TNT)/ITO photoelectrode is fabricated to improve the energy conversion efficiencies of quantum dots-sensitized solar cells (QDSCs). Our experimental results show that the double-sided CdS quantum dots-sensitized TNT/ITO photoelectrodes show enhanced light absorption. As a consequence, the photoelectrochemical response of the CdS/TNT/ITO photoelectrode is much improved compared with single-sided CdS sensitized TNT arrays on Ti substrate (i.e., CdS/TNT/Ti photoelectrode). An optimum conversion efficiency of 7.5 % is achieved by the double-sided CdS(15)/TNT/ITO photoelectrode, which is an enhancement of about 120 % when compared with the single-sided CdS/TNT/Ti photoelectrode. Our results demonstrate that the energy conversion efficiencies of QDSCs can be improved by designing a new photoelectrode structure. |
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