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O: Fachverband Oberflächenphysik

O 82: Plasmonics and Nanooptics: Fabrication, Characterization and Applications II

O 82.2: Vortrag

Donnerstag, 20. März 2025, 10:45–11:00, H8

Revolutionizing OLED Performance and Efficiency with Core-Shell Nanoparticles in HTL and Carbon Dots in ETL Layers — •Zoi Georgiopoulou^1,2, Apostolis Verykios¹, Theodoros Triadis¹, and Maria Vasilopoulou¹ — ¹Institute of Nanoscience and Nanotechnology, National Center for Scientific Research *Demokritos* — ²Solid State Physics Section, Department of Physics, National and Kapodistrian University of Athens

The development of efficient organic light-emitting diodes (OLEDs) is essential for advancing modern displays and flexible electronics. This presentation explores two methodologies to enhance OLED performance through innovative material integration. The first involves incorporating core-shell nanoparticles into the hole transport layer (HTL). Metal nanoparticles (M-NPs) are encapsulated in a tungsten polyoxometalate (POM) compound and embedded in the PEDOT:PSS layer, leveraging the Localized Surface Plasmon Resonance (LSPR) effect. Analyses, including UV-Vis spectroscopy, atomic force microscopy, and electrical measurements, reveal enhanced optoelectronic properties with POM-M-NP integration. The second approach enhances OLED efficiency by combining carbon dots and a porphyrin layer in the electron transport layer (ETL). Carbon dots improve electron mobility and reduce recombination losses, while the porphyrin layer facilitates charge injection and blocks backflow. This synergy optimizes charge balance, lowers operating voltage, and improves luminous efficiency. These strategies underscore the importance of advanced material engineering in OLED development

Keywords: Organic Light-Emitting Diodes (OLEDs); Core-Shell Metal Nanoparticles; Hole Transport Layer (HTL); Electron Transport Layer (ETL); Localized Surface Plasmon Resonance (LSPR)