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Phenoxazine Dyes fo...
Phenoxazine Dyes for Dye-Sensitized Solar Cells : Relationship Between Molecular Structure and Electron Lifetime
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- Karlsson, Karl Martin (författare)
- KTH,Organisk kemi,Molekylär elektronik, CMD
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- Jiang, Xiao (författare)
- KTH,Oorganisk kemi,Molekylär elektronik, CMD
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- Eriksson, Susanna Kaufman (författare)
- Uppsala universitet,Fysikalisk kemi
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- Gabrielsson, Erik (författare)
- KTH,Organisk kemi,Molekylär elektronik, CMD
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- Rensmo, Håkan (författare)
- Uppsala universitet,Institutionen för fysik och astronomi
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- Hagfeldt, Anders (författare)
- Uppsala universitet,Fysikalisk kemi
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- Sun, Licheng (författare)
- KTH,Organisk kemi,Molekylär elektronik, CMD
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(creator_code:org_t)
- 2011-04-20
- 2011
- Engelska.
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Ingår i: Chemistry - A European Journal. - : Wiley. - 0947-6539 .- 1521-3765. ; 17:23, s. 6415-6424
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- 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 TiO2 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 TiO2 particles).
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- charge transfer
- dyes/pigments
- energy conversion
- sensitizers
- solar cells
- TECHNOLOGY
- TEKNIKVETENSKAP
- Chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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