Solid-state white light-emitting electrochemical cells using iridium-based cationic transition metal complexes |
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| Authors: | Su Hai-Ching Chen Hsiao-Fan Fang Fu-Chuan Liu Chih-Che Wu Chung-Chih Wong Ken-Tsung Liu Yi-Hung Peng Shie-Ming |
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| Institution: | Department of Electrical Engineering, Graduate Institute of Electro-optical Engineering, National Taiwan University, Taipei 10617, Taiwan. |
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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. |
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