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

Autor:	Jueng Gil Lee, Younggu Lee, Su Jin Baek, Jun Ho Youn, Jin Jang, Hyeong Pil Kim, Dong Hee Nam
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Materials science business.industry Diffusion chemistry.chemical_element General Chemistry Polymer engineering.material Conductivity Coating chemistry PEDOT:PSS Materials Chemistry engineering Optoelectronics business Layer (electronics) Indium Diode
Zdroj:	Journal of Materials Chemistry C. 1:3250
ISSN:	2050-7534 2050-7526
DOI:	10.1039/c3tc00855j
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8526ae171c8b85871f1808d1db0d9922 https://doi.org/10.1039/c3tc00855j Zobrazit plný text záznamu