Thin-film transistor as a probe to study carrier transport in amorphous organic semiconductors

Shu-Kong So; Wing H. Choi; Chi H. Cheung

doi:10.1117/1.3534200

1 January 2011 Thin-film transistor as a probe to study carrier transport in amorphous organic semiconductors

Shu-Kong So, Wing H. Choi, Chi H. Cheung

Author Affiliations +

Journal of Photonics for Energy, Vol. 1, Issue 1, 011011 (January 2011). https://doi.org/10.1117/1.3534200

Abstract

We describe how to use the thin-film transistor (TFT) technique to quantify carrier transport of amorphous organic semiconductors relevant to organic electronic devices. We have chosen several amorphous materials, including arylamine compounds, 4,4′-N,N′-dicarbazole-biphenyl (CBP), and a phosphorescent dye molecule [Ir(ppy)₃] for investigations. Generally, the field effect (FE) mobility was found to be about one order of magnitude smaller than that obtained from an independent time-of-flight (TOF) technique. For N′-diphenyl-N,N′-bis(3-methylphenyl)-(1,1′-biphenyl)-4,4′-diamine (TPD) and N,N′-Bis(3-methylphenyl)-N,N′-bis(phenyl)-9,9-spirobifluorene (spiro-TPD), the FE mobilities were found to be 1.7×10−⁵ and 1.3 ×10−⁵cm²/Vs, respectively. Temperature-dependent measurements were carried out to study the FE mobility. It was found that the energetic disorder increased in the neighborhood of a gate dielectric layer. This factor is one of the origins causing the discrepancy between TFT and TOF mobilities. We also examined how the hole transport of CBP is affected by Ir(ppy)3 when it is doped into CBP.

Citation Download Citation

Shu-Kong So, Wing H. Choi, and Chi H. Cheung "Thin-film transistor as a probe to study carrier transport in amorphous organic semiconductors," Journal of Photonics for Energy 1(1), 011011 (1 January 2011). https://doi.org/10.1117/1.3534200

Published: 1 January 2011

ACCESS THE FULL ARTICLE

JOURNAL ARTICLE
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

CITATIONS

Cited by 4 scholarly publications.

Explore citations on Lens.org

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Telescopic pixel displays

Thin films

Transistors

Dielectrics

Molecules

Organic semiconductors

Organic light emitting diodes

Show All Keywords

RELATED CONTENT

Beyond conventional organic transistors novel approaches with improved performance...
Proceedings of SPIE (October 07 2014)

Solution processed high-performance organic thin film transistors
Proceedings of SPIE (August 25 2006)

Organic thin film transistor arrays for active matrix organic light...
Proceedings of SPIE (September 21 2007)

High performance organic field-effect transistors with fluoropolymer gate dielectric
Proceedings of SPIE (September 13 2007)

Characterization and optimization of OLED materials and layer sequences
Proceedings of SPIE (February 02 2001)

Low voltage operation of the organic thin film transistor with...
Proceedings of SPIE (November 17 2003)

Determination of carrier mobility of amorphous organic electronic material by...
Proceedings of SPIE (September 02 2008)

Subscribe to Digital Library

Receive Erratum Email Alert

Show All Keywords

Keywords/Phrases

Search In:

Publication Years