CdS quantum dots-sensitized TiO2 nanotube arrays for solar cells

Autor: Tao Zeng, Jiamin Feng, Haizheng Tao, Xiaotao Sui, Xianchun Lou, Xiujian Zhao, Xuelai Wang
Rok vydání: 2013
Předmět:
Zdroj: Journal of Wuhan University of Technology-Mater. Sci. Ed.. 28:17-21
ISSN: 1993-0437
1000-2413
Popis: CdS quantum dots(QDs) sensitized TiO2 nanotube arrays photoelectrodes were investigated for their photovoltaic performance of quantum dots-sensitized solar cells. The highly ordered TiO2 nanotube arrays(TNAs) were synthesized on Ti foils by anodic oxidation method. Then CdS quantum dots were deposited onto the TiO2 nanotube arrays by successive ionic layer absorption and reaction(SILAR) method to serve as the sensitizers. Cd(NO3)2 and Na2S were used as the precursor materials of Cd+ and S2− ions, respectively. It is found that the CdS QDs sensitizer may significantly increase the light response of TiO2 nanotube arrays. With increasing CdS QDs deposition cycles, the visible light response increases. Maximum photocurrent was obtained for the QDs that have an absorption peak at about 500 nm. Under AM 1.5 G illuminations(100 mW cm−2), a 4.85 mA/cm2 short circuit current density was achieved, and the maximium energy conversion efficiency of the asprepared CdS QDs-sensitized TNAs solar cells was obtained as high as 0.81 % at five SILAR cycles.
Databáze: OpenAIRE
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