Recent progress in deep-blue phosphorescent OLEDs

C. Schildknecht; C. Lennartz; K. Kahle; O. Molt; E. Fuchs; N. Moonen; J. Rudolph; G. Wagenblast; P. Amrhein; J. Proelss; I. Muenster

doi:10.1117/12.741441

16 October 2007 Recent progress in deep-blue phosphorescent OLEDs

C. Schildknecht, C. Lennartz, K. Kahle, O. Molt, E. Fuchs, N. Moonen, J. Rudolph, G. Wagenblast, P. Amrhein, J. Proelss, I. Muenster

Author Affiliations +

Proceedings Volume 6655, Organic Light Emitting Materials and Devices XI; 665502 (2007) https://doi.org/10.1117/12.741441
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

Cyclometallated iridium N-heterocyclic carbene (NHC)-complexes have become known as efficient deep blue triplet emitters in OLEDs. With these emitters suitable CIE color coordinates of CIE x ~ 0.15 and CIE y = 0.1...0.2 can easily be reached. To keep the expensive and tedious synthetic and laboratory screening effort for new emitters and complementary materials as efficient as possible a good computational pre-screening method based on quantum chemical theory is used. In this paper, data will be presented which show a good correlation between calculated and measured values of for example triplet energy, ionization potential and electron affinity. Only by having good control of these parameters it is possible to design efficient and long lasting devices. Based on this, we will show our progress in the deep-blue color region by optimizing the device setup and by employing a new, much more stable complementary material set.

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C. Schildknecht, C. Lennartz, K. Kahle, O. Molt, E. Fuchs, N. Moonen, J. Rudolph, G. Wagenblast, P. Amrhein, J. Proelss, and I. Muenster "Recent progress in deep-blue phosphorescent OLEDs", Proc. SPIE 6655, Organic Light Emitting Materials and Devices XI, 665502 (16 October 2007); https://doi.org/10.1117/12.741441

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