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Proceedings Paper

Efficient inverted organic light-emitting devices by amine-based solvent treatment (Presentation Recording)
Author(s): Myoung Hoon Song; Kyoung-Jin Choi; Eui Dae Jung
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Paper Abstract

The efficiency of inverted polymer light-emitting diodes (iPLEDs) were remarkably enhanced by introducing spontaneously formed ripple-shaped nanostructure of ZnO (ZnO-R) and amine-based polar solvent treatment using 2-methoxyethanol and ethanolamine (2-ME+EA) co-solvents on ZnO-R. The ripple-shape nanostructure of ZnO layer fabricated by solution process with optimal rate of annealing temperature improves the extraction of wave guide modes inside the device structure, and 2-ME+EA interlayer enhances the electron injection and hole blocking and reduces exciton quenching between polar solvent treated ZnO-R and emissive layer. As a result, our optimized iPLEDs show the luminous efficiency (LE) of 61.6 cd A-1, power efficiency (PE) of 19.4 lm W-1 and external quantum efficiency (EQE) of 17.8 %. This method provides a promising method, and opens new possibilities for not only organic light-emitting diodes (OLEDs) but also other organic optoelectronic devices such as organic photovoltaics, organic thin film transistors, and electrically driven organic diode laser.

Paper Details

Date Published: 5 October 2015
PDF: 1 pages
Proc. SPIE 9566, Organic Light Emitting Materials and Devices XIX, 956618 (5 October 2015); doi: 10.1117/12.2187239
Show Author Affiliations
Myoung Hoon Song, Ulsan National Institute of Science and Technology (Korea, Republic of)
Kyoung-Jin Choi, Ulsan National Institute of Science and Technology (Korea, Republic of)
Eui Dae Jung, Ulsan National Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 9566:
Organic Light Emitting Materials and Devices XIX
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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