The ESR spectrum of linear triplet e&tons in single crystals of 1 $dibromonaphthaIene (DBN) was studied ig the temperature range berween 2Β°K and room temperature. The exciton migration maintains its one-dimensional character up to 300Β°K. The ESR hnewidth is strongly temperature dependent. This fact
Temperature dependence of ESR lineshapes of triplet excitons in molecular pairs
β Scribed by U. Schmid; P. Reineker
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 450 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The ESK Iineshspe of rripkt escitons moving between two diITercntly oriented molecules of a pair is calculated. Our model hxmiltonian contains the ciectronic interaction matrix element for the coherent esciton transport, the Zeentan ener-**v of :hc triplet spin in an csternal magnetic field. the fine structure of the differently oriented molecules. the phonons zin the crystal which xc dcscribcd 3s ;I 1x31 bath. and the microscopic interaction between cscitons and phonons. ITor the ~~:tphIktki~~ Inir the IinrsktIws arc dixusscd with respect to the tempemture and ;1 paranlerer characterizing the strength 13f 111~ intcrcr4on bctwccn tscirons and phonons.
π SIMILAR VOLUMES
The ESR spectrum of metzstable triplet escitons in sinple cryst:k of 1.4 dibromrrnaphthalene (1.4 DRN) nt 1.4"K and 35 GHz W;IS investigated. Optical measurements have established previously :hnt in this system escitons are free even at 1.1' IL Esciton motion in these crystals takes place main!y by
The photoconductivity of films of amorphous molecular semiconductors increases upon simultaneous photogeneration of singlet electron-hole pairs (EHPs) and triplet excitons and decreases upon photogeneration of triplet EHPs and triplet excitons. An increase in external electric field strength leads t