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 (∼400 °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 ∼200 °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.
Original language | English |
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Pages (from-to) | 32373-32379 |
Number of pages | 7 |
Journal | ACS Applied Materials and Interfaces |
Volume | 10 |
Issue number | 38 |
DOIs | |
Publication status | Published - 2018 Sept 26 |
Externally published | Yes |
Keywords
- light extraction
- light scattering
- metal nanoparticles
- organic light-emitting diodes (OLEDs)
- plasmonics
ASJC Scopus subject areas
- Materials Science(all)