Polymer light-emitting diodes with inkjet-printed electrodes for all solution-processed display application (Conference Presentation)

Hyungsoo Yoon; Jongjang Park; Byeongmoon Lee; Changhee Lee; Yongtaek Hong

doi:10.1117/12.2508191

8 March 2019 Polymer light-emitting diodes with inkjet-printed electrodes for all solution-processed display application (Conference Presentation)

Hyungsoo Yoon, Jongjang Park, Byeongmoon Lee, Changhee Lee, Yongtaek Hong

Author Affiliations +

Proceedings Volume 10942, Advances in Display Technologies IX; 109420C (2019) https://doi.org/10.1117/12.2508191
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Solution-processed polymer light-emitting diodes (PLEDs) have been widely investigated in display area due to their low-cost and large-scale fabrication. Generally, in order to pattern the device, the electrodes are deposited through a vacuum process such as sputtering or thermal evaporation. In terms of cost, inkjet printing is the most promising alternative to evaporation process because it allows low-material consumption as well as free patterning of the electrodes. However, direct inkjet-printing on the organic layers induces solvent permeation, which causes severe damage to underlying layers. In addition, fine patterns are hard to be obtained because the surface treatment on the functional layers is limited. In this research, we report solution-processed PLEDs with inkjet-printed electrodes. In order to prevent solvent permeation and obtain fine patterns by inkjet printing, we print top electrode on surface-modified polydimethylsiloxane (PDMS) substrate and laminate it on the organic functional layers. A structure of our devices is ITO (anode) / PEDOT :PSS (HIL) / PDY-132 (EML) / PEI (interlayer) / ZnO (EIL) / Ag (cathode). The device with laminated Ag shows a turn-on voltage of 2.7 V at 1 cd/m2 and a current efficiency of 7.8 cd/A at 1000 cd/m2, while the device with evaporated Ag shows 2.4 V and 9.9 cd/A under the same condition. Based on our lamination process, all solution-processed PLEDs are fabricated by replacing ITO to inkjet-printed PEDOT :PSS. Furthermore, passive-matrix application is demonstrated showing the possibilities of all solution-processed display. Detailed fabrication process and experimental results will be discussed at the conference.

Conference Presentation

Citation Download Citation

Hyungsoo Yoon, Jongjang Park, Byeongmoon Lee, Changhee Lee, and Yongtaek Hong "Polymer light-emitting diodes with inkjet-printed electrodes for all solution-processed display application (Conference Presentation)", Proc. SPIE 10942, Advances in Display Technologies IX, 109420C (8 March 2019); https://doi.org/10.1117/12.2508191

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Electrodes

Organic light emitting diodes

Silver

Inkjet technology

Printing

Optical lithography

Sputter deposition

Show All Keywords

Keywords/Phrases

Search In:

Publication Years