Dissertation/Thesis Abstract

Trap depth dependence on deposition temperature in copper phthalocyanine thin films from photocurrent
by Guerra, Jorge L., M.Sc., California State University, Long Beach, 2012, 168; 1517636
Abstract (Summary)

While organic conductors and semiconductors have been studied for more than a century, they remain less understood than their inorganic counterparts. In this thesis we detail and expand upon an analytic model describing transient photocurrent decay proposed by Twarowski. We apply this model to measurements performed on a series of copper phthalocyanine thin film samples prepared at various substrate temperatures. This analysis reveals a decrease in trap depth with increase in deposition temperature with values ranging from 0.31 ± 0.07 eV for samples prepared near room temperature, to 0.06 ± 0.02 eV for samples prepared near 200°C. The data also confirmed published values for the electronic band gap at 2.1 ± 0.3 eV with a possible deposition temperature dependence, as well as a gap state at 0.65 ± 0.06 eV which we found to behave as a donor. In this text we outline the measurement and evaluation of these and more results, as well as discuss their significance and implications.

Indexing (document details)
Advisor: Gredig, Thomas
School: California State University, Long Beach
School Location: United States -- California
Source: MAI 51/01M(E), Masters Abstracts International
Subjects: Physics, Molecular physics, Condensed matter physics
Publication Number: 1517636
ISBN: 978-1-267-46038-7
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