Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures
- Authors
- Choi, Junhee; Kim, Seonju; Park, Cheol Hwee; Kwack, Jin Ho; Park, Chan Hyuk; Hwang, Ha; Im, Hyeong-Seop; Park, Young Wook; Ju, Byeong-Kwon
- Issue Date
- 26-9월-2018
- Publisher
- AMER CHEMICAL SOC
- Keywords
- organic light-emitting diodes (OLEDs); plasmonics; metal nanoparticles; light extraction; light scattering
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.10, no.38, pp.32373 - 32379
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 10
- Number
- 38
- Start Page
- 32373
- End Page
- 32379
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/73059
- DOI
- 10.1021/acsami.8b07026
- ISSN
- 1944-8244
- Abstract
- We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (similar to 400 degrees C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of similar to 200 degrees C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24% in a flexible OLED compared to a reference device.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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