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Proceedings Paper

Preparation and characterization of phosphorescence organic light emitting diodes using PVK:Ir(ppy)3 emission layer
Author(s): Hak Min Lee; Su Cheol Gong; Ji Geun Chang; Sang Ouk Ryu; Myoung Sun Gong; Jun Yeop Lee; Young Chul Chang; Ho Jung Chang
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Paper Abstract

The phosphorescence polymer LEDs (PhPLEDs) with the structure of ITO/PEDOT:PSS/PVK:Ir(ppy)3/TPBI/LiF/Al were fabricated and investigated on the electrical and optical properties at variations doping concentrations (0.5wt% to 2.5wt%) of Ir(ppy)3. PVK(poly-vinylcarbazole) and Ir(ppy)3[tris(2-phenylpyridine)iridium(III)] polymers were used as the host and guest materials for the emission layer. TPBI was introduced to improve the light efficiency of the devices. The maximum luminance and current density for PhPLED were about 8600 cd/m2 and 155 mA/cm2 at 7 V, when the TPBI layer was introduced between emission and cathode electrode film. The emission spectrum and the CIE color coordinator were about 512nm and x, y = 0.28, 0.63, respectively, showing green color.

Paper Details

Date Published: 16 February 2009
PDF: 8 pages
Proc. SPIE 7213, Organic Photonic Materials and Devices XI, 72131B (16 February 2009); doi: 10.1117/12.808331
Show Author Affiliations
Hak Min Lee, Dankook Univ. (Korea, Republic of)
Su Cheol Gong, Dankook Univ. (Korea, Republic of)
Ji Geun Chang, Dankook Univ. (Korea, Republic of)
Sang Ouk Ryu, Dankook Univ. (Korea, Republic of)
Myoung Sun Gong, Dankook Univ. (Korea, Republic of)
Jun Yeop Lee, Dankook Univ. (Korea, Republic of)
Young Chul Chang, Korea Univ. of Technology and Education (Korea, Republic of)
Ho Jung Chang, Dankook Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7213:
Organic Photonic Materials and Devices XI
Robert L. Nelson; François Kajzar; Toshikuni Kaino, Editor(s)

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