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Proceedings Paper

Optical and thermal studies of deep levels in the photothermoplastic PVK:TNF
Author(s): Mayer Tapiero
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Paper Abstract

Thin films of the organic complex PVK:TNF were studied for various rates of TNF (0 to 50%) by means of photoinduced current transient spectroscopy (PICYS) and photoconductivity measurements. PICTS reveals the presence of a continuous trap distribution. Both the two models of the transport phenomenon by hopping (microscopic behavior) or by multiple trapping (more efficient for a quantitative explanation) explain the shape of the decay of photoconductivity and the observed results. Contrarily to amorphous semiconductors, the trap distribution is not here exponential. In a first approximation, the distribution is fairly uniform until 0.6-0.65 eV, followed by a sharp decrease until about 0.85 eV where the density of states practically vanishes. The microscopic model of hopping allow an interpretation of the distribution and gives a plausible explanation of the observed results.

Paper Details

Date Published: 10 November 2003
PDF: 9 pages
Proc. SPIE 5212, Linear and Nonlinear Optics of Organic Materials III, (10 November 2003); doi: 10.1117/12.508026
Show Author Affiliations
Mayer Tapiero, Institut de Physique et Chimie des Materiaux de Strasbourg (France)

Published in SPIE Proceedings Vol. 5212:
Linear and Nonlinear Optics of Organic Materials III
Mark G. Kuzyk; Manfred Eich; Robert A. Norwood, Editor(s)

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