Solid-state white light-emitting electrochemical cells using iridium-based cationic transition metal complexes.
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.
Su
Hai-Ching
HC
Department of Electrical Engineering, Graduate Institute of Electro-optical Engineering, National Taiwan University, Taipei 10617, Taiwan.
Chen
Hsiao-Fan
HF
Fang
Fu-Chuan
FC
Liu
Chih-Che
CC
Wu
Chung-Chih
CC
Wong
Ken-Tsung
KT
Liu
Yi-Hung
YH
Peng
Shie-Ming
SM
D002412:Cations / Q000737:chemistry; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D007495:Iridium / Q000737:chemistry*; D008027:Light; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D011789:Quantum Theory; D013997:Time Factors
D002412:Cations; D049408:Luminescent Agents; D009942:Organometallic Compounds; D007495:Iridium