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2015 ; 373
(2044
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Multiple exciton generation in quantum dots versus singlet fission in molecular
chromophores for solar photon conversion
#MMPMID25987579
Beard MC
; Johnson JC
; Luther JM
; Nozik AJ
Philos Trans A Math Phys Eng Sci
2015[Jun]; 373
(2044
): ä PMID25987579
show ga
Both multiple exciton generation (MEG) in semiconductor nanocrystals and singlet
fission (SF) in molecular chromophores have the potential to greatly increase the
power conversion efficiency of solar cells for the production of solar
electricity (photovoltaics) and solar fuels (artificial photosynthesis) when used
in solar photoconverters. MEG creates two or more excitons per absorbed photon,
and SF produces two triplet states from a single singlet state. In both cases,
multiple charge carriers from a single absorbed photon can be extracted from the
cell and used to create higher power conversion efficiencies for a photovoltaic
cell or a cell that produces solar fuels, like hydrogen from water splitting or
reduced carbon fuels from carbon dioxide and water (analogous to biological
photosynthesis). The similarities and differences in the mechanisms and
photoconversion cell architectures between MEG and SF are discussed.