Next Article in Journal
Advances in Biodegradable 3D Printed Scaffolds with Carbon-Based Nanomaterials for Bone Regeneration
Next Article in Special Issue
Impact of Acidity Profile on Nascent Polyaniline in the Modified Rapid Mixing Process—Material Electrical Conductivity and Morphological Study
Previous Article in Journal
An Antibiotic-Releasing Bone Void Filling (ABVF) Putty for the Treatment of Osteomyelitis
Previous Article in Special Issue
An Insight into Ionic Conductivity of Polyaniline Thin Films
Article

Bottom Contact Metal Oxide Interface Modification Improving the Efficiency of Organic Light Emitting Diodes

1
Molecular Electronics and Photonics Research Unit, Department of Mechanical Engineering and Materials Science and Engineering, Cyprus University of Technology, Limassol 3603, Cyprus
2
Department of Physics, Clarendon Laboratory, University of Oxford, Parks Rd, Oxford OX1 3PU, UK
3
Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
*
Author to whom correspondence should be addressed.
Materials 2020, 13(22), 5082; https://doi.org/10.3390/ma13225082
Received: 11 October 2020 / Revised: 2 November 2020 / Accepted: 9 November 2020 / Published: 11 November 2020
(This article belongs to the Special Issue Advances in Materials for Organic Optoelectronics and Photonics)
The performance of solution-processed organic light emitting diodes (OLEDs) is often limited by non-uniform contacts. In this work, we introduce Ni-containing solution-processed metal oxide (MO) interfacial layers inserted between indium tin oxide (ITO) and poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) to improve the bottom electrode contact for OLEDs using the poly(p-phenylene vinylene) (PPV) derivative Super-Yellow (SY) as an emission layer. For ITO/Ni-containing MO/PEDOT:PSS bottom electrode structures we show enhanced wetting properties that result in an improved OLED device efficiency. Best performance is achieved using a Cu-Li co-doped spinel nickel cobaltite [(Cu-Li):NiCo2O4], for which the current efficiency and luminous efficacy of SY OLEDs increased, respectively, by 12% and 11% from the values obtained for standard devices without a Ni-containing MO interface modification between ITO and PEDOT:PSS. The enhanced performance was attributed to the improved morphology of PEDOT:PSS, which consequently increased the hole injection capability of the optimized ITO/(Cu-Li):NiCo2O4/PEDOT:PSS electrode. View Full-Text
Keywords: interfaces; electrodes; wetting properties; metal-oxides; hole injection; organic light emitting diodes interfaces; electrodes; wetting properties; metal-oxides; hole injection; organic light emitting diodes
Show Figures

Figure 1

MDPI and ACS Style

Pozov, S.M.; Ioakeimidis, A.; Papadas, I.T.; Sun, C.; Chrusou, A.Z.; Bradley, D.D.C.; Choulis, S.A. Bottom Contact Metal Oxide Interface Modification Improving the Efficiency of Organic Light Emitting Diodes. Materials 2020, 13, 5082. https://doi.org/10.3390/ma13225082

AMA Style

Pozov SM, Ioakeimidis A, Papadas IT, Sun C, Chrusou AZ, Bradley DDC, Choulis SA. Bottom Contact Metal Oxide Interface Modification Improving the Efficiency of Organic Light Emitting Diodes. Materials. 2020; 13(22):5082. https://doi.org/10.3390/ma13225082

Chicago/Turabian Style

Pozov, Sergey M., Apostolos Ioakeimidis, Ioannis T. Papadas, Chen Sun, Alexandra Z. Chrusou, Donal D.C. Bradley, and Stelios A. Choulis 2020. "Bottom Contact Metal Oxide Interface Modification Improving the Efficiency of Organic Light Emitting Diodes" Materials 13, no. 22: 5082. https://doi.org/10.3390/ma13225082

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop