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Light emission from dark excitons in light emitting devices

Singh, Jai and Kugler, S. (2009). Light emission from dark excitons in light emitting devices. Physica Status Solidi A: Applications and Materials Science,206(5):993-996.

Document type: Journal Article

IRMA ID 80801245xPUB48
Title Light emission from dark excitons in light emitting devices
Author Singh, Jai
Kugler, S.
Journal Name Physica Status Solidi A: Applications and Materials Science
Publication Date 2009
Volume Number 206
Issue Number 5
ISSN 1862-6319   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-65649099069
Start Page 993
End Page 996
Total Pages 4
Place of Publication Berlin, Germany
Publisher Wiley - VCH Verlag GmbH & Co. KGaA
HERDC Category C1 - Journal Article (DEST)
Abstract Applying the first order perturbation theory and a new time-dependent spin-orbit-photon interaction operator the rate of spontaneous emission from triplet (dark) excitons calculated in organic molecular solids, conjugated polymers and quantum dots is reviewed. The rates are found to be in good agreement with the experimental results in materials where the concept of Wannier-Mott type excitons is applicable, for example, in inorganic amorphous solids, conjugated polymers and quantum dots. In organic molecular solids or molecules, where Frenkel type excitons are formed, the calculated rates do not compare well with experiments. Application of the current theory is critically examined and discussed in light of the traditional approach of the second-order perturbation theory used for the triplet radiative recombination.
DOI http://dx.doi.org/10.1002/pssa.200881343   (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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Created: Mon, 22 Mar 2010, 12:08:15 CST by Sarena Wegener