Luminescence and triplet energy transfer in mixed crystals. I. Two-component systems

Quantitative results are given for the temperature dependence of the intensities and decays of phosphorescence and delayed fluorescence in a number of two-component organic mixed crystals. These results are interpreted in terms of a kinetic model. For low guest concentrations, the guest phosphorescence decay is found to be first order and strongly temperature dependent with an activation energy different from that involved in energy transfer to the host triplet exciton level.

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Luminescence and triplet energy transfer in mixed crystals. II. Three component systems

Australian Journal of Chemistry ◽

10.1071/ch9692085 ◽

1969 ◽

Vol 22 (10) ◽

pp. 2085 ◽

Cited By ~ 1

Author(s):

KR Adam ◽

MF O'Dwyer

Keyword(s):

Energy Transfer ◽

Concentration Dependence ◽

Guest Molecule ◽

Triplet Exciton ◽

Mixed Crystals ◽

Host Crystal ◽

Triplet Energy ◽

Guest Molecules ◽

Component Systems ◽

Triplet Energy Transfer

Triplet-triplet energy transfer between two guest molecules in a host crystal has been studied by observing the temperature and concentration dependence of the phosphorescence of the donor guest molecule. The results are interpreted in terms of transfer via the host triplet exciton band.

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Exciton Phosphorescence of p-Terphenyl Crystal at 300 K

Zeitschrift für Naturforschung A ◽

10.1515/zna-1980-0805 ◽

1980 ◽

Vol 35 (8) ◽

pp. 823-827 ◽

Cited By ~ 1

Author(s):

Eizi Morikawa ◽

Masahiro Kotani

Keyword(s):

Energy Transfer ◽

Absorption Coefficient ◽

Phosphorescence Spectrum ◽

Delayed Fluorescence ◽

Triplet Energy ◽

Diffusion Limited ◽

Exciton Lifetime ◽

Glassy Solution ◽

Vibrational Progression ◽

Triplet Energy Transfer

Abstract Exciton phosphorescence from pure p-terphenyl crystals was observed at 300 K. The 0-0 band of the phosphorescence spectrum was found at 20.4 X 103 cm-1 . The vibrational progression of 1.46 x 103 cm-1 is present. The maximum exciton lifetime observed was 200 ms. The excitation spectrum of the exciton phosphorescence differs considerably from that observed in glassy solution, but is poorly structured as well. The absorption coefficient near the origin is small. The absence of sensitized delayed fluorescence from doped tetracene suggests that the triplet energy transfer to this guest is not diffusion limited.

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P-Typ-verzögerte Fluoreszenz von 1-Naphthyl-9-carbazyl-methan

Zeitschrift für Naturforschung A ◽

10.1515/zna-1986-0712 ◽

1986 ◽

Vol 41 (7) ◽

pp. 971-973

Author(s):

Maximilian Zander

Keyword(s):

Energy Transfer ◽

Filter Paper ◽

Light Absorption ◽

Delayed Fluorescence ◽

Triplet Energy ◽

Experimental Findings ◽

Triplet Energy Transfer ◽

Step Mechanism ◽

Triplet Triplet Annihilation

P-tvpe Delayed Fluorescence o f 1-Naphthyl-9-carbazyl-methane At 77 K 1-naphthyl-9-carbazyl-methane adsorbed on filter paper shows predominantly delayed fluorescence o f the carbazole chromophore. The experimental findings are in agreement with the assumption that the carbazole chromophore after excitation by light absorption becomes first deactivated by intramolecular triplet-triplet energy transfer and then re-excited in a two-step mechanism including intermolecular naphthalene triplet-triplet annihilation and intramolecular singlet-singlet energy transfer from the naphthalene to the carbazole chromophore.

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Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants

Chemical Communications ◽

10.1039/c5cc04469c ◽

2015 ◽

Vol 51 (60) ◽

pp. 11972-11975 ◽

Cited By ~ 63

Author(s):

Shipan Wang ◽

Yuewei Zhang ◽

Weiping Chen ◽

Jinbei Wei ◽

Yu Liu ◽

...

Keyword(s):

Energy Transfer ◽

Power Efficiency ◽

High Efficiency ◽

Delayed Fluorescence ◽

Triplet Energy ◽

Thermally Activated Delayed Fluorescence ◽

Light Emitting ◽

Thermally Activated ◽

External Power ◽

Triplet Energy Transfer

A high-efficiency fluorescent organic light-emitting device with a maximum external power efficiency (PE) of 53.4 lm W−1 was fabricated through efficient triplet energy transfer from a thermally activated delayed fluorescence (TADF) host to conventional fluorescent dopants.

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