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Several structural modifications have been made to a sensitizer dye based on the phenoxazine core, which was tested in a solid-state dye-sensitized solar cell configuration based on the hole transporting material 2,2′,7,7′,-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9′,-spirofluorene. Light-to-power conversion efficiencies between 2.5% and 4.1% are reported herein. The difference in device performance is significantly related to the variations of dye molecular structure, with dye molecules having surface protecting alkoxy-groups yielding better solar cell devices. The phenoxazine dyes were characterized by their light harvesting capabilities and electronic properties such as electron recombination lifetime and chemical dipole moment.
| Authors: | Martin Karlsson, Lei Yang, Martin K. Karlsson, Licheng Sun, Gerrit Boschloo, Anders Hagfeldt | |
| Journal: | Journal of Photochemistry and Photobiology A: Chemistry | |
| Year: | 2012 | |
| DOI: | 10.1016/j.jphotochem.2012.04.014 | |
| Publication date: | 30-04-2012 |
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