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Molecular Engineeri...
Molecular Engineering of Organic Chromophores for Dye Sensitized Solar Cell Applications
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- Hagberg, Daniel, 1977- (författare)
- KTH,Organisk kemi,Licheng Sun
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- Hagfeldt, Anders (författare)
- KTH,Fysikalisk kemi
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- Sun, Licheng (författare)
- KTH,Organisk kemi
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- Marinado, Tannia (författare)
- KTH,Fysikalisk kemi
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- Karlsson, Karl Martin (författare)
- KTH,Organisk kemi
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(creator_code:org_t)
- 2008-04-18
- 2008
- Engelska.
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Ingår i: Journal of the American Chemical Society. - : ACS. - 0002-7863 .- 1520-5126. ; 130, s. 6259-6266
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Novel unsymmetrical organic sensitizers comprising donor, electron-conducting, and anchoring groups were engineered at a molecular level and synthesized for sensitization of mesoscopic titanium dioxide injection solar cells. The unsymmetrical organic sensitizers 3-(5-(4-(diphenylamino)styryl)thiophen-2-yl)-2-cyanoacrylic acid (D5), 3-(5-bis(4-(diphenylamino)styryl)thiophen-2-yl)-2-cyanoacrylic acid (D7), 5-(4-(bis(4-methoxyphenylamino)styryl)thiophen-2-yl)-2-cyanoacrylic acid (D9), and 3-(5-bis(4,4'-dimethoxydiphenylamino)styryl)thiophen-2-yl)-2-cyanoacrylic acid (D11) anchored onto TiO2 and were tested in dye-sensitized solar cell with a volatile electrolyte. The monochromatic incident photon-to-current conversion efficiency of these sensitizers is above 80%, and D11-sensitized solar cells yield a short-circuit photocurrent density of 13.90 +/- 0.2 mA/cm(2), an open-circuit voltage of 740 +/- 10 mV, and a fill factor of 0.70 +/- 0.02, corresponding to an overall conversion efficiency of 7.20% under standard AM 1.5 sun light. Detailed investigations of these sensitizers reveal that the long electron lifetime is responsible for differences in observed open-circuit potential of the cell. As an alternative to liquid electrolyte cells, a solid-state organic hole transporter is used in combination with the D9 sensitizer, which exhibited an efficiency of 3.25%. Density functional theory/time-dependent density functional theory calculations have been employed to gain insight into the electronic structure and excited states of the investigated species.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Nyckelord
- nanocrystalline tio2
- electron-injection
- recombination
- semiconductor
- chromophores
- conductor
- energies
- dynamics
- acceptor
- model
- Chemical engineering
- Kemiteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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