Organic phototransistor behavior and light-accelerated bias stress

Maarten Debucquoy; Stijn Verlaak; Soeren Stoedel; Kris Myny; Jan Genoe; Paul Heremans

doi:10.1117/12.734157

13 September 2007 Organic phototransistor behavior and light-accelerated bias stress

Maarten Debucquoy, Stijn Verlaak, Soeren Stoedel, Kris Myny, Jan Genoe, Paul Heremans

Proceedings Volume 6658, Organic Field-Effect Transistors VI; 66580R (2007) https://doi.org/10.1117/12.734157
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

We studied pentacene thin film field-effect transistors to characterize their behavior as organic phototransistors. The shift in turn-on voltage (V_on), responsible for the high sensitivity of these devices to illumination, is proved to be dependent on the illumination time and applied gate voltage during illumination, a relationship which was, until now, completely neglected in the description of these devices. Moreover, we show this behavior to be similar to the shift in V_on during bias stress experiments in the dark and both processes can be described with the same V_on vs time relationship, already previously reported for dark bias stress experiments on organic transistors. By comparing these characteristics in devices with a different treatment of the gate dielectric, trapping of electrons by OH-groups at the gate dielectric/organic semiconductor interface is indicated as a main origin for these shifts in V_on. In this way we do not only reduce organic phototransistors behavior to light-accelerated bias stress in unstable thin film transistors, but also pin-point one major cause of organic transistor instability.

Citation Download Citation

Maarten Debucquoy, Stijn Verlaak, Soeren Stoedel, Kris Myny, Jan Genoe, and Paul Heremans "Organic phototransistor behavior and light-accelerated bias stress", Proc. SPIE 6658, Organic Field-Effect Transistors VI, 66580R (13 September 2007); https://doi.org/10.1117/12.734157

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