Self-assembled monolayer modification of PEDOT:PSS interface to improve the device performance in blue PLED

Yong Kyun Lee; Tae Jin Park; Woo Sik Jeon; Jung Joo Park; Jang Hyuk Kwon; Jin Jang

doi:10.1117/12.731980

16 October 2007 Self-assembled monolayer modification of PEDOT:PSS interface to improve the device performance in blue PLED

Yong Kyun Lee, Tae Jin Park, Woo Sik Jeon, Jung Joo Park, Jang Hyuk Kwon, Jin Jang

Author Affiliations +

Proceedings Volume 6655, Organic Light Emitting Materials and Devices XI; 66551E (2007) https://doi.org/10.1117/12.731980
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

As a result of intensive research on polymer light-emitting diodes (PLEDs) for the last several years, the device performances have been remarkably improved. Recently, several researchers reported on a PLEDs with an interlayer between poly(3,4-ethylenedioxythiophene)-poly-(styrenesulfonate) (PEDOT:PSS) and an emissive polymer. It improved the device efficiency as well as the device lifetime. The role of the interlayer is to block the electron from back diffusion to PEDOT:PSS and/or to reduce luminescence quenching at the PEDOT:PSS interface. We studied the improvement of the PLED by inserting an octadecyltrichlorosilane (OTS) as the interlayer between PEDOT:PSS and the emissive layer. The OTS was treated on PEDOT:PSS through the self-assembled monolayer (SAM) process. It improved the device efficiency of the PLED from 3.86 to 4.76 cd/A, and increased the operation lifetime from 270 to 340 minute comparing the non-OTS treated PLED with the OTS treated PLED for 10 min. In blue PLED, inserting the OTS layer between blue polymer and PEDOT:PSS is promoted hole injection from an anode. Therefore, the device efficiency is improved, which appears to be due to the increase of balanced recombination as a result of the accumulated electrons near the interface between emissive layer and PEDOT:PSS.

Citation Download Citation

Yong Kyun Lee, Tae Jin Park, Woo Sik Jeon, Jung Joo Park, Jang Hyuk Kwon, and Jin Jang "Self-assembled monolayer modification of PEDOT:PSS interface to improve the device performance in blue PLED", Proc. SPIE 6655, Organic Light Emitting Materials and Devices XI, 66551E (16 October 2007); https://doi.org/10.1117/12.731980

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