Singlet-fission sensitizers for ultra-high efficiency excitonic solar cells : 15 August 2005 - 14 October 2008 /
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| Corporate Author: | |
| Format: | Government Document eBook |
| Language: | English |
| Published: |
Golden, Colo. :
National Renewable Energy Laboratory,
[2008]
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| Series: | NREL/SR ;
520-44685. |
| Subjects: | |
| Online Access: | https://purl.fdlp.gov/GPO/LPS114962 |
| Abstract: | Sensitizer dyes capable of producing two triplet excited states from a singlet excited state produced by the absorption of a single photon would allow an increase of the efficiency of photovoltaic cells by up to a factor of 1.5, provided that each triplet injects an electron into a semiconductor such as TiO2. Although singlet fission in certain crystals and polymers was reported long ago, little is known about its efficiency in dyes suitable for use as sensitizers of photoinduced charge separation on semiconductors surfaces. In summary, we have produced the first designed crystalline material for singlet fission, and we have made the first determinations of the coupling strength in a covalent dimer that is required for efficient singlet fission. We have suggested paths for overcoming a problem that has been identified and have already started to develop them in a follow-up project. |
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| Item Description: | Title from title screen (viewed on Jan. 7, 2009). "December 2008." Electronic resource. |
| Physical Description: | iii, 27 pages : digital, PDF file. |
| Format: | Mode of access: Internet from the NREL web site. Address as of 7/17/09: http://www.nrel.gov/docs/fy09osti/44685.pdf ; current access available via PURL. |