Jpn. J. Appl. Phys. 48 (2009) 082101 (4 pages)  |Previous Article| |Next Article|  |Table of Contents|
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High Efficiency Tandem Organic Light-Emitting Diodes Using Interconnecting Layer

Heui-Dong Lee, Seok Jong Lee, Kwang Yeon Lee, Byung Soo Kim, Se Hee Lee, Hyo Dae Bae, and Yoon Heung Tak

(Received October 8, 2008; accepted May 14, 2009; published online August 20, 2009)

We have studied an efficient interconnecting layer (TR-E314:Li/LGC101:NPB), in stacked organic light-emitting diodes (OLEDs). The interconnecting layer is applied to stacked blue OLEDs that have two emission units. The efficiency of this OLED is twice that of the single-unit device. The current, power efficiency, and operating voltage of the blue OLED reached 14.6 cd/A, 7.3 lm/W, and 6.3 V, respectively, at 10 mA/cm². The Commission Internationale d'Eclairage (CIE) coordinates of the stacked OLED device are (0.128, 0.228). The 20% decay lifetime (t_0.8) of the stacked OLED (366 h) is 4.4 times that of the single-unit OLED.

URL: http://jjap.jsap.jp/link?JJAP/48/082101/
DOI: 10.1143/JJAP.48.082101

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