標題: Efficient solid-state white light-emitting electrochemical cells based on phosphorescent sensitization
作者: Su, Hai-Ching
Chen, Hsiao-Fan
Chen, Po-Hsien
Lin, Shih-Wei
Liao, Chih-Teng
Wong, Ken-Tsung
照明與能源光電研究所
Institute of Lighting and Energy Photonics
公開日期: 21-十一月-2012
摘要: Efficient phosphorescent sensitized white light-emitting electrochemical cells (LECs) based on a blue-emitting phosphorescent cationic transition metal complex (CTMC) doped with a red-emitting fluorescent dye are demonstrated. Blue phosphorescence and phosphorescence-sensitized red fluorescence contribute to white emission. Furthermore, the microcavity effect of the device structure is utilized to suppress the green part of the electroluminescence (EL) spectrum of the blue-emitting phosphorescent metal complex (1) via destructive interference. Hence, more saturated blue EL emission can be obtained. When combined with saturated red emission, white EL emission with Commission Internationale de l'Eclairage coordinates approaching (0.33, 0.33) can be obtained without the need for saturated deep-blue emitting CTMCs. Peak external quantum efficiency and power efficiency of the phosphorescence sensitized white LECs are up to 7.9% and 15.6 lm W-1, respectively. These efficiencies are among the highest reported for white LECs and reveal that phosphorescent sensitization is useful for improving device efficiencies of white LECs.
URI: http://dx.doi.org/10.1039/c2jm35483g
http://hdl.handle.net/11536/20610
ISSN: 0959-9428
DOI: 10.1039/c2jm35483g
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 22
Issue: 43
起始頁: 22998
結束頁: 23004
顯示於類別:期刊論文


文件中的檔案:

  1. 000310721400025.pdf