Issue 19, 2013
From the journal:

Journal of Materials Chemistry C

Improving the lifetime of a polymer light-emitting diode by introducing solution processed tungsten-oxide†

Jun Ho Youn,a   Su Jin Baek,a   Hyeong Pil Kim,a   Dong Hee Nam,b   Younggu Lee,b   Jueng Gil Leeb  and  Jin Jang*a  

* Corresponding authors

a Advanced Display Research Center and Department of Information Display, Kyung Hee University, 26 Kyunghee-daero, Dongdaemun-gu, Seoul, Korea
E-mail: jjang@khu.ac.kr
Fax: +82-961-9154
Tel: +82-961-0270

b LG Display Co. Ltd, 1007 Deogeun-ri, Wollong-myeon, Paju-si, Gyeonggi-do, Korea

Abstract

We report a polymer light-emitting diode (PLED) using solution processed tungsten-oxides (WOx). Coating of a thin WOx layer on PEDOT:PSS increases the current efficiency of PLED from 9.11 to 9.90 cd A−1 because of the improved conductivity of the PEDOT:PSS due to the incorporation of WOx. Improvement of the conductivity of PEDOT:PSS promotes hole injection into the emission layer. The lifetime of a PLED with WOx layers on both sides of PEDOT:PSS is 1.8 × 106 h which is around 20 times longer than that of the control device at 1000 cd m−2. The enhanced lifetime is due to the suppression of the indium diffusion from ITO to PEDOT:PSS by WOx and also due to the prevention of acidic damage that can occur to ITO and the organic emission layer by sulfate ions in PEDOT:PSS.

Graphical abstract: Improving the lifetime of a polymer light-emitting diode by introducing solution processed tungsten-oxide

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Article information

DOI
https://doi.org/10.1039/C3TC00855J
Article type
Paper
Submitted
15 Dec 2012
Accepted
21 Mar 2013
First published
25 Mar 2013

J. Mater. Chem. C, 2013,1, 3250-3254

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Improving the lifetime of a polymer light-emitting diode by introducing solution processed tungsten-oxide

J. H. Youn, S. J. Baek, H. P. Kim, D. H. Nam, Y. Lee, J. G. Lee and J. Jang, J. Mater. Chem. C, 2013, 1, 3250 DOI: 10.1039/C3TC00855J

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