1.
Phys Chem Chem Phys
; 17(6): 4020-4, 2015 Feb 14.
Artigo
em Inglês
| MEDLINE
| ID: mdl-25574759
RESUMO
Triplet-triplet annihilation (TTA) based up-conversion is a promising strategy for light harvesting the low-energy tail of the solar spectrum with photovoltaic technologies. Here, we present a bi-component system for photon managing via TTA that allows bypassing the classical statistic limit of 2/5 in the singlet generation, achieving a near unitary conversion efficiency. This result is obtained because of the peculiar relative position of the triplet and singlet energy levels of perylene, used as up-converter and emitter. The system shows a record red-to-blue external up-conversion yield of â¼10% under an irradiance of 1 sun.