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Proceedings Paper

Space-resolved recombination electroluminescence in organic crystals
Author(s): Jan Kalinowski
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Paper Abstract

The elucidation of spatial distribution of emitting states in electroluminescent (EL) cells is a challenge to both a refined scientific probe of materials and to design a variety of EL devices. In molecular organic crystals important aspects of this distribution can be mapped onto a trap- dependent electron-hole recombination process involving exciton-charge carrier interaction. We use this process to describe the space-resolved EL in single crystals of anthracene and tetracene as a function of applied electric field. The emphasis of the paper will be on the importance of EL spatial pattern of the charge injection ability of electrodes and distributions of electron and hole traps. Detailed features of the spatial EL intensity patterns in these crystals will be illustrated as a function of electric field and type of injecting contacts. They differ essentially for these two model crystals. In particular, it will be shown that a splitting of the anode EL zone, proceeding regularly with increasing voltage in tetracene, disappears in anthracene crystals.

Paper Details

Date Published: 27 August 1993
PDF: 12 pages
Proc. SPIE 1910, Electroluminescent Materials, Devices, and Large-Screen Displays, (27 August 1993); doi: 10.1117/12.151140
Show Author Affiliations
Jan Kalinowski, CNR (Italy) and Technical Univ. of Gdansk (Poland)

Published in SPIE Proceedings Vol. 1910:
Electroluminescent Materials, Devices, and Large-Screen Displays
Esther M. Conwell; Milan Stolka; M. Robert Miller, Editor(s)

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