Concepts for high efficient white OLEDs for lighting applications

A. Hunze; R. Krause; S. Seidel; O. Weiss; F. Kozlowski; G. Schmid; J. Meyer; M. Kröger; H. H. Johannes; W. Kowalsky; T. Dobbertin

doi:10.1117/12.731599

16 October 2007 Concepts for high efficient white OLEDs for lighting applications

A. Hunze, R. Krause, S. Seidel, O. Weiss, F. Kozlowski, G. Schmid, J. Meyer, M. Kröger, H. H. Johannes, W. Kowalsky, T. Dobbertin

Author Affiliations +

Proceedings Volume 6655, Organic Light Emitting Materials and Devices XI; 665511 (2007) https://doi.org/10.1117/12.731599
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

Apart from usage of organic light emitting diodes for flat panel display applications OLEDs are a potential candidate for the next solid state lighting technology. One key parameter is the development of high efficient, stable white devices. To realize this goal there are different concepts. Especially by using highly efficient phosphorescent guest molecules doped into a suitable host material high efficiency values can be obtained. We started our investigations with a single dopant and extended this to a two phosphorescent emitter approach leading to a device with a high power efficiency of more than 25 lm/W @ 1000 cd/m². The disadvantage of full phosphorescent device setups is that esp. blue phosphorescent emitters show an insufficient long-term stability. A possibility to overcome this problem is the usage of more stable fluorescent blue dopants, whereas, due to the fact that only singlet excitons can decay radiatively, the efficiency is lower. With a concept, proposed by Sun et al.¹ in 2006, it is possible to manage the recombination zone and thus the contribution from the different dopants. With this approach stable white color coordinates with sufficient current efficiency values have been achieved.

Citation Download Citation

A. Hunze, R. Krause, S. Seidel, O. Weiss, F. Kozlowski, G. Schmid, J. Meyer, M. Kröger, H. H. Johannes, W. Kowalsky, and T. Dobbertin "Concepts for high efficient white OLEDs for lighting applications", Proc. SPIE 6655, Organic Light Emitting Materials and Devices XI, 665511 (16 October 2007); https://doi.org/10.1117/12.731599

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available