Investigation of the CdS quantum dot sensitized solar cells based on a series of zinc titanium mixed metal oxides

• Published in: Optical materials 2020-09, Vol.107, p.110059, Article 110059
• Main Authors: Liu, Jie, Wang, Chenglei, Ge, Zhongwei, Wang, Tong, Xia, Lixin, Wu, Yunhu, Du, Na, Xiao, Hongdi, Liu, Jianqiang
• Format: Article
• Language: English
• Subjects: Layered double hydroxide; Mixed metal oxides; Photoanode materials; Quantum dot sensitized solar cells
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2020.110059

In this work, a series of zinc titanium mixed metal oxides obtained from the zinc titanium layered double hydroxides as precursor were prepared as the photoanode material of the CdS quantum dot-sensitized solar cells. CdS quantum dots were deposited on photoanodes by the successive ionic adsorption and reaction method. It was investigated that the effects of photoanode based on different Zn–Ti molar ratios on the photovoltaic performance of solar cells. The essential parameters of samples were investigated by UV–vis absorption spectrum, incident photon-to-current conversion efficiency, photoelectric conversion efficiency and electrochemical impendence spectrum. The varying Zn–Ti ratios influence adsorption properties and charge mobility. As a result, the cells based on Zn–Ti MMOs achieved an optimum power conversion efficiency of 2.71% when the Zn–Ti ratio is 7:1. •Zn–Ti MMOs were prepared from LDH precursor.•Zn–Ti MMOs were used as the photoanode of QDSSCs.•The influence of the ZnTi ratios on the cell efficiency was studied.•The best efficiency reached 2.71% when the ZnTi ratio was 7:1.