Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

被引：36

作者：

Choi, Junhee ^{[1
]}

Kim, Seonju ^{[1
,3
]}

Park, Cheol Hwee ^{[1
]}

Kwack, Jin Ho ^{[1
,3
]}

Park, Chan Hyuk ^{[1
]}

Hwang, Ha ^{[1
]}

Im, Hyeong-Seop ^{[2
]}

Park, Young Wook ^{[4
]}

Ju, Byeong-Kwon ^{[1
]}

机构：

[1] Korea Univ, Display & Nanosyst Lab, Dept Elect Engn, Seoul 02841, South Korea

[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[3] Samsung Display Co, Samsung St 181, Asan 31454, Chungcheongnam, South Korea

[4] Sun Moon Univ, Sch Mech & ICT Convergence Engn, Asan 31460, Chungcheongnam, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2018年 / 10卷 / 38期

基金：

新加坡国家研究基金会;

关键词：

organic light-emitting diodes (OLEDs); plasmonics; metal nanoparticles; light extraction; light scattering; SURFACE-PLASMON RESONANCE; SOLAR-CELLS; DELAYED FLUORESCENCE; EFFICIENT; DEVICES; OLEDS; INDEX; PEDOTPSS; FILMS; EMISSION;

D O I：

10.1021/acsami.8b07026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页码：32373 / 32379

页数：7

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