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Proceedings Paper

Next generation organic light-emitting materials and devices (Presentation Recording)
Author(s): Bernard Kippelen

Paper Abstract

In this talk, we will discuss recent innovations in organic light-emitting materials and devices. First, we will report on organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF). We will show that devices based on the emitter 4CzIPN doped in a novel ambipolar host can yield a current efficacy of 81 cd/A and a maximum external quantum efficiency of 26.5%. These devices exhibit a low turn-on voltage of 3.2 V at 10 cd/m2, as well as reduced efficiency roll-off at high current densities. The performance of these devices is comparable to that of electrophosphorescent devices based on organic-metallic compounds that contain precious metals such as Iridium. In a second part we will report on highly efficient green-emitting organic light-emitting diodes (OLEDs) fabricated on shape memory polymer (SMP) substrates for flexible electronic applications. SMPs are a class of mechanically active materials that can change and store shape upon activation by a stimulus. The combination of the unique properties of SMP substrates with the light-emitting properties of OLEDs pave to the way for new applications, including conformable smart skin devices, minimally invasive biomedical devices, and flexible lighting/display technologies. Finally, we will present OLEDs fabricated on substrates made from cellulose nanocrystals (CNC) and discuss how such substrates can reduce the environmental footprint of printable organic electronics.

Paper Details

Date Published: 5 October 2015
PDF: 1 pages
Proc. SPIE 9566, Organic Light Emitting Materials and Devices XIX, 956613 (5 October 2015); doi: 10.1117/12.2187057
Show Author Affiliations
Bernard Kippelen, Georgia Institute of Technology (United States)

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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