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Study of organic light emitting devices (OLEDs) with optimal emission efficiency

Singh, Jai (2010). Study of organic light emitting devices (OLEDs) with optimal emission efficiency. Physica Status Solidi. C: Current Topics in Solid State Physics,7(3-4):984-987.

Document type: Journal Article

IRMA ID 81704288xPUB454
Title Study of organic light emitting devices (OLEDs) with optimal emission efficiency
Author Singh, Jai
Journal Name Physica Status Solidi. C: Current Topics in Solid State Physics
Publication Date 2010
Volume Number 7
Issue Number 3-4
ISSN 1610-1642   (check CDU catalogue open catalogue search in new window)
Start Page 984
End Page 987
Total Pages 4
Place of Publication Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
HERDC Category C1 - Journal Article (DIISR)
Abstract The external emission efficiency of organic light emitting devices (OLEDs) is analysed by studying the rate of spontaneous emission of both singlet and triplet excitons and their corresponding radiative lifetimes. Rates of spontaneous emissions are calculated from the first order perturbation theory using the newly discovered timedependent spin-orbit-exciton-photon interaction operator as the perturbation operator. It is clearly shown how the new interaction operator is responsible for attracting triplet excitons to a phosphor (heavy metal atom) and then it flips the spins to a singlet configuration. Thus, the spin forbidden transition becomes spin allowed. Calculated rates agree with the experimental results qualitatively. Results are of general interests for OLED studies.
Keywords 71.35.−y
78.60.Fi
85.60.Jb
DOI http://dx.doi.org/10.1002/pssc.200982735   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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