Synthesis of diimidazolylstilbenes as n-type blue fluorophores: alternative dopant materials for highly efficient electroluminescent devices.

Chou, Ho-Hsiu; Chen, Yi-Hsiang; Hsu, He-Pei; Chang, Wen-Hsin; Chen, Yu-Han; Cheng, Chien-Hong · Adv Mater · 2012

basic_science · Level V

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Abstract

Two new n-type diimidazolylstilbenes as blue-fluorescent dopant materials are synthesized and characterized. Blue-fluorescent devices based on these two compounds as the dopants reveal outstanding external quantum efficiencies (EQEs) (current efficiencies) of 7.8% (10.4 cd A(-1) ) and 7.7% (7.9 cd A(-1) ) with Commission internationale de l'Eclairage (CIE) co-ordinates of (0.14, 0.15) and (0.15, 0.11).

Medical subject headings