Excimer formation in organic emitter films associated with a molecular orientation promoted by steric hindrance

Jaehyun Lee; Beomjin Kim; Ji Eon Kwon; Joonghan Kim; Daisuke Yokoyama; Katsuaki Suzuki; Hidetaka Nishimura; Atsushi Wakamiya; Soo Young Park; Jongwook Park

doi:10.1039/C4CC05348F

Excimer formation in organic emitter films associated with a molecular orientation promoted by steric hindrance†

Jaehyun Lee,^a Beomjin Kim,^a Ji Eon Kwon,^b Joonghan Kim,^a Daisuke Yokoyama,^c Katsuaki Suzuki,^d Hidetaka Nishimura,^d Atsushi Wakamiya,^d Soo Young Park^b and Jongwook Park*^a

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^a Department of Chemistry/Display Research Center, The Catholic University of Korea, Bucheon, South Korea
E-mail: hahapark@catholic.ac.kr
Fax: +82-2-2164-4764
Tel: +82-2-2164-4821

^b Department of Materials Science & Engineering, Seoul National University, San 56-1, Sillim 9-dong, Gwanak-gu, Seoul 151-744, Korea

^c Department of Organic Device Engineering and Research Center for Organic Electronics (ROEL), Yamagata University, 4-3-16, Johnan, Yonezawa, Yamagata, Japan

^d Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan

Abstract

White emission with two sharp strong peaks – a molecular emission peak at 455 nm and an excimer emission peak at 591 nm – was obtained by introducing a terphenyl group into a highly twisted core chromophore, which promoted a molecular orientation in the film state suitable for excimer formation.

Chemical Communications

Excimer formation in organic emitter films associated with a molecular orientation promoted by steric hindrance†

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Excimer formation in organic emitter films associated with a molecular orientation promoted by steric hindrance

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