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Photoconduction and magnetic field effect on photoconduction in hole-transporting star-burst amine (m-MTDATA) films
Abstract
Photoconduction and magnetic field effect on photoconduction have been investigated as a function of electric field strength, excitation light intensity and wavelength in vacuum evaporated films of m-MTDATA (4,4′,4″-tris(N-(3-methylphenyl)-N-phenylylamino) triphenylamine), the starburst amine commonly used as hole-transporting material in organic light-emitting diodes. The photocurrent is found to be generated by the singlet exciton dissociation at the illuminated Al anode/m-MTDATA interface in accordance with the 1-D Onsager mechanism and in the bulk of the sample in terms of the 3-D Onsager model of e–h pair separation. The surface component of photocurrent is magnetic field independent whereas the bulk-generated photocurrent is influenced by external magnetic field of the hyperfine coupling (HFC) as well as fine structure modulation (FSM) scales.
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Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
ORGANIC ELECTRONICS
no. 21,
pages 54 - 65,
ISSN: 1566-1199 - Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Pelczarski D., Grygiel P., Miśnik M., Stampor W.: Photoconduction and magnetic field effect on photoconduction in hole-transporting star-burst amine (m-MTDATA) films// ORGANIC ELECTRONICS. -Vol. 21, (2015), s.54-65
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.orgel.2015.02.020
- Verified by:
- Gdańsk University of Technology
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