Current-voltage characteristics of polymer light-emitting diodes

Esther M. Conwell; Ming Wei Wu

doi:10.1117/12.284177

1 December 1997 Current-voltage characteristics of polymer light-emitting diodes

Esther M. Conwell, Ming Wei Wu

Proceedings Volume 3148, Organic Light-Emitting Materials and Devices; (1997) https://doi.org/10.1117/12.284177
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Conduction in pristine conjugated polymers is by polaron hopping between sites corresponding to conjugation lengths. The strong increase of current I with voltage V observed for both emission-limited and ohmic contacts is due in large part to mobility increase as increasing field makes it more possible to overcome internal barriers, such as energy differences between sites. For emission-limited contacts an additional source of nonlinear increase of I with increasing V is greater ability to escape return to the injecting electrode due to the image force. For ohmic contacts additional nonlinearity comes from space charge effects. We are able to fit I vs. V for electron or hole conduction is some poly(p-phenylene vinylene), PPV, derivatives with ohmic contacts for reasonable values of the parameters involved.

Citation Download Citation

Esther M. Conwell and Ming Wei Wu "Current-voltage characteristics of polymer light-emitting diodes", Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); https://doi.org/10.1117/12.284177

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