Polarized phosphorescent organic light-emitting devices adopting mesogenic host–guest systems
學年 99
學期 1
出版（發表）日期 2011-01-01
作品名稱 Polarized phosphorescent organic light-emitting devices adopting mesogenic host–guest systems
作品名稱（其他語言）
著者 Liu, Su-hao; Lin, Ming-shiang; Chen, Li-yin; Hong, Yun-hua; Tsai, Chih-hung; Wu, Chung-chih; Anurach Poloek; Chi, Yun; Chen, Chien-an; Chen, Shaw H.; Hsu, Hsiu-fu
單位 淡江大學化學學系
出版者 Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數 Organic Electronics 12(1), pp.15-21
摘要 We report successful realization of workable polarized phosphorescent organic light-emitting devices (OLEDs) by combining a recently developed mesogenic phosphorescent Pt(II) complex and a mesogenic oligofluorene host to form the corresponding mesogenic host–guest emitting system. In the host–guest film, the mesogenic Pt(II) complex tends to aggregate and self-assemble into the columnar stacking arrangement, exhibiting metal–metal-to-ligand charge transfer (MMLCT) emission of the Pt(II) complex. Both the host molecules and guest aggregates in the host–guest films were successfully aligned by using the rubbed conducting polymer as the alignment layer. With such aligned host–guest films, polarized red-emitting OLEDs were successfully implemented, showing an EL polarization ratio of ∼2, a maximal brightness exceeding 2000 cd/m2, and a cd/A efficiency up to 2.4 cd/A. Due to the particular alignment mechanism of guest aggregates and the unique MMLCT emission mechanism, the polarized OLED exhibiting stronger electroluminescence perpendicular to the rubbing direction than along the rubbing direction.
關鍵字 OLEDs;Phosphorescence;Polarized emission;Liquid crystal
語言 en
ISSN 1566-1199
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Wu, Chung-chih; Chi, Yun; Chen, Shaw H.
審稿制度
國別 NLD
公開徵稿
出版型式 紙本
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