Transport mechanisms in polymer and TiO2 Schottky diode

K. H. Yoo; K. S. Kang; Y. Chen; K. J. Han; Jaehwan Kim

doi:10.1117/12.815583

31 March 2009 Transport mechanisms in polymer and TiO₂ Schottky diode

K. H. Yoo, K. S. Kang, Y. Chen, K. J. Han, Jaehwan Kim

Proceedings Volume 7291, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009; 72910J (2009) https://doi.org/10.1117/12.815583
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

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. E^1/2 and log(J/E) vs. E^1/2 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.

Citation Download Citation

K. H. Yoo, K. S. Kang, Y. Chen, K. J. Han, and Jaehwan Kim "Transport mechanisms in polymer and TiO₂ Schottky diode", Proc. SPIE 7291, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009, 72910J (31 March 2009); https://doi.org/10.1117/12.815583

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