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Thermally stimulated luminescence versus thermally stimulated current in organic solids

Arkhipov, V. I. and Emelianova, E. V. and Schmechel, Roland and Seggern, Heinz von (2004):
Thermally stimulated luminescence versus thermally stimulated current in organic solids.
338/34, In: Journal of non-crystalline solids, pp. 626-629, [Online-Edition: http://dx.doi.org/10.1016/j.jnoncrysol.2004.03.056],
[Article]

Abstract

A unified model of hopping thermally stimulated luminescence (TSL) and thermally stimulated current (TSC) in disordered organic semiconductors and polymers is suggested. The differences between photoinduced TSL and TSC, measured on the same sample, are explained by the fact that metastable geminate pairs of charges rather than free carriers are primarily photogenerated in these materials. Since the Coulomb interaction does not prevent carriers from recombining into excitons, the rate-limiting step in the TSL kinetics is carrier release from traps. However, the Coulomb binding energy strongly affects the dissociation of geminate pairs into free charge carriers and, therefore, it changes the apparent activation energy of TSC.

Item Type: Article
Erschienen: 2004
Creators: Arkhipov, V. I. and Emelianova, E. V. and Schmechel, Roland and Seggern, Heinz von
Title: Thermally stimulated luminescence versus thermally stimulated current in organic solids
Language: English
Abstract:

A unified model of hopping thermally stimulated luminescence (TSL) and thermally stimulated current (TSC) in disordered organic semiconductors and polymers is suggested. The differences between photoinduced TSL and TSC, measured on the same sample, are explained by the fact that metastable geminate pairs of charges rather than free carriers are primarily photogenerated in these materials. Since the Coulomb interaction does not prevent carriers from recombining into excitons, the rate-limiting step in the TSL kinetics is carrier release from traps. However, the Coulomb binding energy strongly affects the dissociation of geminate pairs into free charge carriers and, therefore, it changes the apparent activation energy of TSC.

Journal or Publication Title: Journal of non-crystalline solids
Volume: 338/34
Divisions: 11 Department of Materials and Earth Sciences
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling > Subproject C5: Phenomenological modelling of injection, transport and recombination in organic semiconducting devices as well as in inorganic ferroelectric materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D4: Fatigue of organic electronic devices
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 20 Nov 2008 08:19
Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2004.03.056
Additional Information:

SFB 595 Cooperation C5, D4

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