A quantum dot sensitized solar cell based on vertically aligned carbon nanotube templated ZnO arrays |
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| Authors: | J Chen C Li DW Zhao W Lei Y Zhang MT Cole DP Chu BP Wang YP Cui XW Sun WI Milne |
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| Institution: | 1. School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China;2. Electrical Engineering Division, Engineering Department, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA, Cambridge, UK;3. School of Electrical and electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;4. Department of Information Display, Kyung Hee University, Seoul 130-701, Republic of Korea |
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| Abstract: | We report on a quantum dot sensitized solar cell (QDSSC) based on ZnO nanorod coated vertically aligned carbon nanotubes (VACNTs). Electrochemical impedance spectroscopy shows that the electron lifetime for the device based on VACNT/ZnO/CdSe is longer than that for a device based on ZnO/CdSe, indicating that the charge recombination at the interface is reduced by the presence of the VACNTs. Due to the increased surface area and longer electron lifetime, a power conversion efficiency of 1.46% is achieved for the VACNT/ZnO/CdSe devices under an illumination of one Sun (AM 1.5G, 100 mW/cm2). |
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