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Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime by Karl Martin Karlsson; Dr. Xiao Jiang; Susanna K Eriksson; Erik Gabrielsson; Dr. Håkan Rensmo; Prof. Anders Hagfeldt; Prof. Licheng Sun is a Chemistry article available to read on EtoBox.
What is Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime about?
## Abstract A series of metal‐free organic dyes with a core phenoxazine chromophore have been synthesized and tested as sensitizers in dye‐sensitized solar cells. Overall conversion efficiencies of 6.03–7.40 % were reached under standard AM 1.5G illumination at a light intensity of 100 mW cm^−2^. A clear trend in electron lifetime could be seen; a dye with a furan‐conjugated linker showed a shorter lifetime relative to dyes with the acceptor group directly attached to the phenoxazine. The addition of an extra donor unit, which bore insulating alkoxyl chains, in the 7‐position of the phenoxazine could increase the lifetime even further and, together with additives in the electrolyte to raise the conduction band, an open circuit voltage of 800 mV could be achieved. From photoelectron spectroscopy and X‐ray absorption spectroscopy of the dyes adsorbed on TiO~2~ particles, it can be concluded that the excitation is mainly of cyano character (i.e., on average, the dye molecules are standing on, and pointing out, from the surface of TiO~2~ particles).
Who reads Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Karl Martin Karlsson; Dr. Xiao Jiang; Susanna K Eriksson; Erik Gabrielsson; Dr. Håkan Rensmo; Prof. Anders Hagfeldt; Prof. Licheng Sun
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0947-6539)
- Published
- 2011
- Language
- EN
- Field
- Chemistry (Physical Sciences)