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On the generation of charge carriers by exciton-exciton collisions in organic molecular crystals

J Singh

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The rate of generation of a free electron and a trapped hole due to the Coulomb interaction between charge carriers of two Frenkel excitons (one free and one trapped) is derived for molecular crystals by time dependent perturbation theory. Electron-lattice and spin-orbit interactions are neglected. The theory is finally applied to benzophenone single crystals where a transition rate approximately 109 cm-3 s-1 is obtained.


PACS

71.35.Aa Frenkel excitons and self-trapped excitons

71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 19 (10 July 1980)



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