Missing links for triplet radiative recombination in light emitting devices

Jai Singh

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in Proceedings

    Abstract

    Light emission from triplet excitons in light emitting devices (LED) is reviewed. The rate of spontaneous emission of triplet excitons is presented in inorganic amorphous semiconductors, molecular crystals and conjugated polymers containing platinum atoms in the chain. It is shown that the recently discovered new time-dependent spin-orbit-photon interaction operator is responsible for the radiative emission from triplet excitations in materials, and the transition occurs due to flipping of the spin. The rate depends on the square of the atomic number of the constituting atoms. The calculated rates and corresponding radiative lifetime agree very well with the known experimental results in conjugated polymers and inorganic amorphous semiconductors. Rates in molecular crystals are compared with those obtained from the traditional theory.
    Original languageEnglish
    Title of host publicationJournal of Optoelectronics and Advanced Materials
    Place of PublicationBucharest, Romania
    PublisherNational Institute of Materials Physics
    Pages-
    Number of pages6
    Volume11
    Publication statusPublished - 2009
    Event2009 International School on Condensed Matter Physics - Varna, Bulgaria
    Duration: 31 Aug 20085 Sep 2008

    Conference

    Conference2009 International School on Condensed Matter Physics
    Period31/08/085/09/08

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    Cite this

    Singh, J. (2009). Missing links for triplet radiative recombination in light emitting devices. In Journal of Optoelectronics and Advanced Materials (Vol. 11, pp. -). National Institute of Materials Physics.