Published in
American Chemical Society, Journal of the American Chemical Society, 11(130), p. 3413-3419, 2008
DOI: 10.1021/ja076051e
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Solid-State White Light-Emitting Electrochemical Cells Using Iridium-Based Cationic Transition Metal Complexes
,
Fu-Chuan Fang,
Chih-Che Liu,
Chung-Chih Wu,
Ken-Tsung Wong,
Yi-Hung Liu,
Shie-Ming Peng,
H.-C.; Chen H-F.; Fang F-C.; Liu C-C.; Wu C-C.; Wong K-T.; Liu Y-H.; Peng S-M. Su
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Abstract
White electroluminescent (EL) emission from single-layered solid-state light-emitting electrochemical cells (LECs) based on host-guest cationic iridium complexes has been successfully demonstrated. The devices show white EL spectra (Commission Internationale de l'Eclairage coordinates ranging from (x, y) = (0.45, 0.40) to (0.35, 0.39) at 2.9-3.3 V with high color rendering indices up to 80. Peak external quantum efficiency and peak power efficiency of the white LEC reach 4% and 7.8 lm/W, respectively. These results suggest that white LECs based on host-guest cationic transition metal complexes may be a promising alternative for solid-state lighting technologies.