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Color tuning of organic light-emitting diodes by adjusting the ligands of heteroleptic iridium(III) complexes

✍ Scribed by Ji Hyun Seo; In Jun Kim; Young Sik Kim; Young Kwan Kim

Publisher: Elsevier Science
Year: 2011
Tongue: English
Weight: 282 KB
Volume: 326
Category: Article
ISSN: 0022-0248
DOI: 10.1016/j.jcrysgro.2011.01.064

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✦ Synopsis

This paper studies color tuning in efficient electrophosphorescent organic light-emitting diodes using heteroleptic iridium complexes, bis(2-phenylquinoline)(2-phenylpyridine)iridium(III) [Ir(pq) 2 (ppy)], and bis(2-phenylpyridine)(2-phenylquinoline)iridium(III) [Ir(ppy) 2 (pq)]. After tuning the emission color by adjusting the number of each ligand, observation revealed the emission peaks at 512 and 600 nm, which arise from ppy and pq ligand, respectively. At a luminance of 1000 cd/m 2 , the experiment maintained good current efficiency: 11.5 and 13.5 cd/A for Ir(pq) 2 (ppy) and Ir(ppy) 2 (pq), respectively.

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