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Title: Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells

Abstract

We present capacitance{endash}voltage and current{endash}voltage measurements of polymer light-emitting electrochemical cells and compare these results with steady state device model calculations. The capacitance{endash}voltage characteristic is used to assess the formation and structure of the electrochemical junction in the device. The cell capacitance and current both increase sharply above a threshold voltage as the bias is increased. The threshold voltage for the rapid increase in capacitance is lower than that for the increase in current, indicating that the electrochemical junction begins to form prior to significant current flow. The electrochemical junction width, estimated from the capacitance measurements, is about 15 nm at a current density of 0.1A/cm{sup 2}. The steady state device model calculations are in reasonable agreement with these observations. {copyright} {ital 1998 American Institute of Physics.}

Authors:
;  [1]; ;  [2]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico (United States) 87545
  2. The University of Texas at Dallas, Richardson, Texas (United States) 75083
Publication Date:
OSTI Identifier:
612466
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 72; Journal Issue: 20; Other Information: PBD: May 1998
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 40 CHEMISTRY; CAPACITANCE; ELECTROCHEMISTRY; CURRENT DENSITY; CHEMILUMINESCENCE; ELECTROCHEMICAL CELLS; POLYMERS; LIGHT EMITTING DIODES; DOPED MATERIALS; FABRICATION

Citation Formats

Campbell, I H, Smith, D L, Neef, C J, and Ferraris, J P. Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells. United States: N. p., 1998. Web. doi:10.1063/1.121419.
Campbell, I H, Smith, D L, Neef, C J, & Ferraris, J P. Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells. United States. https://doi.org/10.1063/1.121419
Campbell, I H, Smith, D L, Neef, C J, and Ferraris, J P. Fri . "Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells". United States. https://doi.org/10.1063/1.121419.
@article{osti_612466,
title = {Capacitance measurements of junction formation and structure in polymer light-emitting electrochemical cells},
author = {Campbell, I H and Smith, D L and Neef, C J and Ferraris, J P},
abstractNote = {We present capacitance{endash}voltage and current{endash}voltage measurements of polymer light-emitting electrochemical cells and compare these results with steady state device model calculations. The capacitance{endash}voltage characteristic is used to assess the formation and structure of the electrochemical junction in the device. The cell capacitance and current both increase sharply above a threshold voltage as the bias is increased. The threshold voltage for the rapid increase in capacitance is lower than that for the increase in current, indicating that the electrochemical junction begins to form prior to significant current flow. The electrochemical junction width, estimated from the capacitance measurements, is about 15 nm at a current density of 0.1A/cm{sup 2}. The steady state device model calculations are in reasonable agreement with these observations. {copyright} {ital 1998 American Institute of Physics.}},
doi = {10.1063/1.121419},
url = {https://www.osti.gov/biblio/612466}, journal = {Applied Physics Letters},
number = 20,
volume = 72,
place = {United States},
year = {1998},
month = {5}
}