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Study of intersystem crossing mechanism in organic materials

Ompong, David and Singh, Jai (2016). Study of intersystem crossing mechanism in organic materials. Physica Status Solidi. C,13(2-3):89-92.

Document type: Journal Article
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Title Study of intersystem crossing mechanism in organic materials
Author Ompong, David
Singh, Jai
Journal Name Physica Status Solidi. C
Publication Date 2016
Volume Number 13
Issue Number 2-3
ISSN 1862-6351   (check CDU catalogue open catalogue search in new window)
eISSN 1610-1642
Start Page 89
End Page 92
Total Pages 4
Place of Publication Germany
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Language English
Field of Research 0204 - Condensed Matter Physics
Abstract Intersystem crossing rate from singlet excited state to triplet excited state of an organic molecule has been derived using exciton-spin-orbit-molecular vibration interaction as a perturbation operator. Incorporation of heavy metal atom enhances the spin-orbit interaction and hence the intersystem crossing rate because it depends on the square of the heaviest atomic number. We found that in the presence of heavy atom the singlet-triplet energy difference still plays an influential role in the intersystem crossing process. The derived exciton-spin-orbit-molecular vibration interaction operator flips the spin of the singlet exciton to triplet exciton after photoexcitaion from the singlet ground state with the assistance of molecular vibrational energy. From this operator an expression for the intersystem crossing rate is derived and calculated in some organic solids.
Keywords Organic materials
Intersystem crossing
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Created: Mon, 07 Nov 2016, 18:30:12 CST by David Ompong