Charge injecting layers for admittance spectroscopy

M. Hoping; C. Schildknecht; H. Gargouri; T. Riedl; M. Tilgner; H.-H. Johannes; W. Kowalsky

doi:10.1117/12.794180

2 September 2008 Charge injecting layers for admittance spectroscopy

M. Hoping, C. Schildknecht, H. Gargouri, T. Riedl, M. Tilgner, H.-H. Johannes, W. Kowalsky

Proceedings Volume 7051, Organic Light Emitting Materials and Devices XII; 70511D (2008) https://doi.org/10.1117/12.794180
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

Abstract

Admittance spectroscopy is a simple yet powerful tool to determine the carrier mobility of organic compounds. One requirement is to have an Ohmic contact for charge injection. By employing a thin interfacial layer of tungsten oxide or molybdenum oxide we have found a possibility to efficiently inject holes into organic materials with a deep highest occupied molecular orbital level down to 6.3 eV. These results considerably enhance the application range of the admittance spectroscopy method. The measured mobility data are in excellent agreement with data obtained by the time-of-flight technique. To efficiently inject electrons into materials with an ionization potential of up to 2.7 eV we thermally evaporated an intermediate layer of cesium carbonate and discuss the extracted electron mobilities.

Citation Download Citation

M. Hoping, C. Schildknecht, H. Gargouri, T. Riedl, M. Tilgner, H.-H. Johannes, and W. Kowalsky "Charge injecting layers for admittance spectroscopy", Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 70511D (2 September 2008); https://doi.org/10.1117/12.794180

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available