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Proceedings Paper

Highly power efficient organic light-emitting devices enabled by phosphorescent and p-i-n technologies
Author(s): Tobias W. Canzler; Markus Burghart; Sven Murano; Jan Blochwitz-Nimoth; Brian D'Andrade; Michael Hack; Julie J. Brown
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Paper Abstract

Organic light-emitting devices (OLEDs) containing highly efficient phosphorescent emitters and highly conductive doped organic transport layers were studied. Saturated red devices with luminous efficiency of 15 cd/A operate at <4 V; hence, they have a record power efficiency of 12 lm/W at 1,000 cd/m2. Additionally, two high-efficiency red OLEDs were serially connected and vertically stacked to create a stacked OLED having a luminous and power efficiency (at 1,000 cd/m2) of 28 cd/A and 12 lm/W, respectively. The electrical connection between the two OLEDs is enabled by molecular p- and n-type doped organic transport layers. The single emissive layer red OLED has a projected lifetime (time to half initial luminance) of ~150,000 hrs from an initial brightness of 500 cd/m2. The stacked device shows very similar lifetime characteristics when driven at similar currents, which results in significantly prolonged lifetime of ~260,000 hrs at an initial luminance of 500 cd/m2.

Paper Details

Date Published: 5 December 2006
PDF: 8 pages
Proc. SPIE 6333, Organic Light Emitting Materials and Devices X, 633311 (5 December 2006); doi: 10.1117/12.679335
Show Author Affiliations
Tobias W. Canzler, Novaled AG (Germany)
Markus Burghart, Novaled AG (Germany)
Sven Murano, Novaled AG (Germany)
Jan Blochwitz-Nimoth, Novaled AG (Germany)
Brian D'Andrade, Universal Display Corp. (United States)
Michael Hack, Universal Display Corp. (United States)
Julie J. Brown, Universal Display Corp. (United States)

Published in SPIE Proceedings Vol. 6333:
Organic Light Emitting Materials and Devices X
Zakya H. Kafafi; Franky So, Editor(s)

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