Journal
OPTICS EXPRESS
Volume 23, Issue 11, Pages A625-A639Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.00A625
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Funding
- National Research Foundation of Korea (NRF) - Korea Government (MEST) [2012R1A2A2A01015654, 2014R1A2A1A10054643]
- Kwangwoon University
- National Research Foundation of Korea [2014R1A2A1A10054643, 2012R1A2A2A01015654] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We report on an investigation of water-processable triple-stacked hole-selective layers for solution-processable organic semiconducting devices using a simple horizontal-dip (H-dip) coating technique. Homogeneous layers were successfully deposited via H-dip-coating using aqueous solutions of graphene oxide (GO), molybdenum oxide (MoO3), and poly(ethylenedioxy thiophene): poly(styrene sulfonate) (PEDOT:PSS). The use of the triple-stacked GO/MoO3/PEDOT: PSS layers as hole-injecting layers (HILs) in solution-processable organic light-emitting diodes (OLEDs) resulted in a considerable improvement of device performance in terms of brightness (maximum brightness: 47,000 cd/m(2)) as well as efficiency (peak efficiency: 31.5 cd/A), exceeding those of an OLED with a conventional single PEDOT: PSS HIL. Furthermore, polymer solar cells (PSCs) with these triple-stacked layers used as hole-collecting layers (HCLs) showed a considerable improvement in power conversion efficiency (6.62%), which was also higher than that (5.65%) obtained using the single PEDOT: PSS HCL. These results clearly indicate the benefits of using triple-stacked GO/MoO3/PEDOT: PSS layers, which provide better hole-injection/collection, electron-blocking, and improved stability for high performance solution-processable OLEDs and PSCs. (C) 2015 Optical Society of America
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