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Proceedings Paper

High-efficiency new polymer light-emitting diodes with a stabilized blue emission
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Paper Abstract

Conjugated polymers with a stabilized blue emission are of importance for the realization of full-color displays using polymer light-emitting diodes. We report a new class of blue-emitting polymers utilizing a new back-bone, poly(2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta [def] phenanthrene)) (PCPP). This material emits a stabilized, efficient blueelectroluminescence(EL) without exhibiting any peak in the long wavelength region (green region) even after prolonged annealing for 18 hours at an elevated temperature of 150°C in air. This attributes to the chemical structure of this new polymer. The backbone of PCPP intrinsically inhibits the formation of the keto-defects mainly responsible for the degradation to green color in typical poly(fluorine) type materials, thereby stabilizing the blue EL emission in the devices.

Paper Details

Date Published: 8 October 2005
PDF: 6 pages
Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 593710 (8 October 2005); doi: 10.1117/12.616042
Show Author Affiliations
Sung Heum Park, Pusan National Univ. (South Korea)
Jin Young Kim, Pusan National Univ. (South Korea)
Sun Hee Kim, Pusan National Univ. (South Korea)
Youngeup Jin, Pusan National Univ. (South Korea)
Jinwoo Kim, Pusan National Univ. (South Korea)
Hongsuk Suh, Pusan National Univ. (South Korea)
Kwanghee Lee, Pusan National Univ. (South Korea)

Published in SPIE Proceedings Vol. 5937:
Organic Light-Emitting Materials and Devices IX
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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