The triplet exciton on the other hand is not much involved in the reactivity of these systems and through its analogous properties is an efficient passive probe that allows us to study changes in the structure and chemical composition of the host-guest system as reactivity proceeds. The study ...
It has been found, that the motion of excitons is thermally activated with the activation energies of 450 ± 60 and 550 ± 60 cm1 for the singlet and triplet excitons, respectively. The later value differs from the activation energy in undoped TCNB-B crystals (where it is 360 ± 60 cm1)...
The interaction of singlet and triplet excitons in organic crystals is examined theoretically in connection with the non-radiative annihilation of singlet excitons on triplet excitons and with the formation of incoherent singlet-triplet bi-excitons....
Singlet fission presents an attractive solution to overcome the Shockley–Queisser limit by generating two triplet excitons from one singlet exciton. However, although triplet excitons are long-lived, their transport occurs through a Dexter transfer, mak
Electroluminescence in organic light-emitting diodes arises from a charge-transfer reaction between the injected positive and negative charges by which they combine to form singlet excitons that subsequently decay radiatively. The quantum yield of this p
Here we show the spin nature of luminescent radicals such as TTM-3PCz allows direct energy harvesting from both singlet and triplet excitons through energy transfer, with subsequent rapid and efficient light emission from the doublet excitons. This is demonstrated with a model Thermally-Activated ...
In typical operation of organic light emitting diodes (OLEDs), excitons are assumed to generate with a ratio of 1:3 for singlet and triplet excitons, respectively, based on a simple spin statistics model. This assumption has been used in... T Takahashi,K Kanemoto,M Kanenobu,... - 《Sci...
White OLEDs: Management of Singlet and Triplet Excitons in a Single Emission Layer: A Simple Approach for a High-Efficiency Fluorescence/Phosphorescence Hy... A high-efficiency single-emission-layer (EML) hybrid white organic light-emitting device is fabricated based on an ideal sky blue fluoropho...
These results establish that there are optimal energetics of singlet and triplet excitons that benefit both singlet fission and exciton diffusion. 展开 关键词: solar energy nanoscience and nanotechnology singlet fission tetracene diffusion photovoltaics ...
The operation and efficiencies of molecular or polymer organic light-emitting diodes depend on the nature of the excited species that are formed. The lowest singlet and triplet excitons display different characteristics that impact on the quantum yields achievable in the devices. Here, by performing ...