Materials and device structures for high-performance poly OLEDs on flexible plastic substrates

Yongtaek Hong; Zhiyong Hong; Jerzy Kanicki

doi:10.1117/12.416916

2 February 2001 Materials and device structures for high-performance poly OLEDs on flexible plastic substrates

Yongtaek Hong, Zhiyong Hong, Jerzy Kanicki

Proceedings Volume 4105, Organic Light-Emitting Materials and Devices IV; (2001) https://doi.org/10.1117/12.416916
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Organic polymer light-emitting devices (Poly OLEDs) with the bi-layer thin film structures have been fabricated on both glass and flexible plastic substrates. The structural, optical, and electrical properties of each organic polymer layer have been optimized for the Poly OLED optimum electrical performances. The spin coating technique was used to fabricate our devices. An alternating co-polymer of poly (9, 9'-dihexyl fluorene-2, 7-diyl) and poly (benzothiadiazole 2, 5-diyl) (PHF-BTD), and poly (9-hexyl carbazole-3, 6-diyl) (PC6) have been used as light emitting and hole transporting polymer, respectively. The combination of the optical and cyclic voltammetry (CV) and analysis has been used to develop the band diagram for our Poly OLEDs. For our polymers, the oxidation/reduction processes are well defined and clearly observed in the CV spectra. This allows a direct comparison of the polymers band gaps determined by both the optical and electrical methods. The photoluminescence and electroluminescence emission peaks are both located around 570 nm, and maximum brightness up to 2000 cd/m² was obtained. Turn-on voltages of approximately 16 and approximately 20 V, acceptable emission efficiencies of approximately 5.5 and approximately 4.2 cd/A, good power efficiencies of approximately 0.9 and 0.6 lm/W, and acceptable external quantum efficiencies of 1.8 and 1.6% have been obtained for OLEDs fabricated on both glass and plastic substrates, respectively.

Citation Download Citation

Yongtaek Hong, Zhiyong Hong, and Jerzy Kanicki "Materials and device structures for high-performance poly OLEDs on flexible plastic substrates", Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); https://doi.org/10.1117/12.416916

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