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CdSe Quantum Dots and N719‐Dye Decorated Hierarchical TiO 2 Nanorods for the Construction of Efficient Co‐Sensitized Solar Cells
Author(s) -
Subramaniam Mohan Raj,
Kumaresan Duraisamy
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500440
Subject(s) - nanorod , quantum dot , dye sensitized solar cell , materials science , energy conversion efficiency , photovoltaic system , nanotechnology , optoelectronics , open circuit voltage , chemical engineering , electrode , voltage , chemistry , electrolyte , ecology , physics , quantum mechanics , engineering , biology
Three‐dimensional hierarchical TiO 2 nanorods (HTNs) decorated with the N719 dye and 3‐mercaptopropionic or oleic acid capped CdSe quantum dots (QDs) in photoanodes for the construction of TiO 2 nanorod‐based efficient co‐sensitized solar cells are reported. These HTN co‐sensitized solar cells showed a maximum power‐conversion efficiency of 3.93 %, and a higher open‐circuit voltage and fill factor for the photoanode with 3‐mercaptopropionic acid capped CdSe QDs due to the strong electronic interactions between CdSe QDs, N719 dye and HTNs, and the superior light‐harvesting features of the HTNs. An electrochemical impedance analysis indicated that the superior charge‐collection efficiency and electron diffusion length of the CdSe QD‐coated HTNs improved the photovoltaic performance of these HTN co‐sensitized solar cells.