期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 19, 页码 16956-16965出版社
AMER CHEMICAL SOC
DOI: 10.1021/am504503q
关键词
cores-shell metal NPs; localized surface plasmon resonance; organic light emitting diodes; organic solar cells; air stability
资金
- National Research Foundation Grant - Korean Government [2012M1A2A2671746]
- Global Frontier R&D Program on Center for Multiscale Energy System - Korean Government [2012M3A6A7055540]
- New & Renewable Energy Program of KETEP - Ministry of Trade, industry & Energy, Republic of Korea [20133030000130]
- Graphene Materials and Components Development Program of MOTIE/KEIT [10011112]
- Samsung Display Co.
- KAIST EEWS Initiative Research Project [EEWSN01140052]
- Ministry of Science, ICT & Future Planning, Republic of Korea [N01140052, KINC01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012M1A2A2671746, 2012M3A6A7055540, 2010-0029611, 2014H1A2A1021809] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this paper, we report and discuss our successful synthesis of monodispersed, polystyrene-coated gold core-shell nanoparticles (Au@PS NPs) for use in highly efficient, air-stable, organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). These core-shell NPs retain the dual functions of (1) the plasmonic effect of the Au core and (2) the stability and solvent resistance of the cross-linked PS shell. The monodispersed Au@PS NPs were incorporated into a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) film that was located between the ITO substrate and the emitting layer (or active layer) in the devices. The incorporation of the Au@PS NPs provided remarkable improvements in the performances of both OLEDs and OPVs, which benefitted from the plasmonic effect of the Au@PS NPs. The OLED device with the Au@PS NPs achieved an enhancement of the current efficiency that was 42% greater than that of the control device. In addition, the power conversion efficiency was increased from 7.6% to 8.4% in PTB7:PC71BM-based OPVs when the Au@PS NPs were embedded. Direct evidence of the plasmonic effect on optical enhancement of the device was provided by near-field scanning optical microscopy measurements. More importantly, the Au@PS NPs induced a remarkable and simultaneous improvement in the stabilities of the OLED and OPV devices by reducing the acidic and hygroscopic properties of the PEDOT:PSS layer.
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