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Proceedings Paper

Transport mechanisms in polymer and TiO2 Schottky diode
Author(s): K. H. Yoo; K. S. Kang; Y. Chen; K. J. Han; Jaehwan Kim
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Paper Abstract

The surface of directly coated TiO2 nanoparticles on the Al-electrode has many nanoscale holes and cracks. The defects of the TiO2 layers can be removed via coating PEDOT:PSS on top of the TiO2 layer. Schottky diodes having various thicknesses of the TiO2 layers and PEDOT:PSS layers were fabricated. The normalized forward current densities were almost the same for the Schottky diodes fabricated with various thicknesses of the TiO2 layers. The current densities of the Schottky diodes with double coatings have large deviation. The log(J) vs. log(V) and shows nonlinear J-V characteristics representing the multiple electron emission mechanisms such as space-charge limited conduction, Poole- Frenkel emission, or thermoionic emission. The plots of log(J) vs. E1/2 and log(J/E) vs. E1/2 show nonlinear behavior and with two distinctive slopes. Based on these results, the electron emission mechanism may have two distinctive mechanisms including Schottky emission mechanism and Poole-Frenkel emission mechanism.

Paper Details

Date Published: 31 March 2009
PDF: 7 pages
Proc. SPIE 7291, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009, 72910J (31 March 2009); doi: 10.1117/12.815583
Show Author Affiliations
K. H. Yoo, Inha Univ. (Korea, Republic of)
K. S. Kang, Inha Univ. (Korea, Republic of)
Y. Chen, Inha Univ. (Korea, Republic of)
K. J. Han, Inha Univ. (Korea, Republic of)
Jaehwan Kim, Inha Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7291:
Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009
Vijay K. Varadan, Editor(s)

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