Singlet-fission sensitizers for ultra-high efficiency excitonic solar cells : 15 August 2005-14 October 2008 / J. Michl.

Format:

Book

Government document

Author/Creator:

Michl, Josef, 1939-

Contributor:

National Renewable Energy Laboratory (U.S.)

Series:

NREL/SR ; 520-44685.

Subcontract report ; NREL/SR-520-44685

Language:

English

Subjects (All):

Semiconductors--Research.

Semiconductors.

Solar cells--Design and construction.

Solar cells.

Photovoltaic cells.

photovoltaic cells.

Physical Description:

1 online resource (iii, 27 pages)

Place of Publication:

Golden, Colo. : National Renewable Energy Laboratory, [2008]

Summary:

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.

Notes:

Title from title screen (viewed on January 7, 2009).

"December 2008."

OCLC:

297224159