Blue‐Emitting Iridium(III) Complexes for Light‐Emitting Electrochemical Cells: Advances, Challenges, and Future Prospects

Light‐emitting electrochemical cells (LECs) are one of the most promising technologies for solid‐sate lighting. Among them, LECs based on phosphorescent iridium(III) complexes have attracted significant research interest in the past 15 years, because of their high efficiency and tunable emission col...

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Bibliographic Details
Published in:Advanced functional materials 2020-08, Vol.30 (33), p.n/a
Main Authors: Bai, Rubing, Meng, Xianwen, Wang, Xiaoxiang, He, Lei
Format: Article
Language:English
Subjects:
blue
Color
device engineering
Efficiency
Electrochemical cells
iridium complexes
Iridium compounds
Lighting
light‐emitting electrochemical cells
Materials science
Performance enhancement
Phosphorescence
Stability
Visible spectrum
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Summary:Light‐emitting electrochemical cells (LECs) are one of the most promising technologies for solid‐sate lighting. Among them, LECs based on phosphorescent iridium(III) complexes have attracted significant research interest in the past 15 years, because of their high efficiency and tunable emission color across the entire visible spectrum. To fabricate white LECs for lighting, high‐performance blue LECs are the first prerequisite. Huge efforts have been devoted to improving the performances of blue LECs based on iridium(III) complexes either by developing new blue‐emitting complexes or by engineering the devices. Nevertheless, blue LECs have still shown much lower performances (brightness, efficiency, stability, etc.) compared to the red, orange‐red, yellow, and green counterpart devices. In particular, a single blue LEC with satisfactory blue‐color purity, high efficiency, and high stability is still missing. Here, the advances in blue‐emitting iridium(III) complexes for LECs and the device engineering on LECs using the complexes are reported. The challenges ahead are discussed, and future prospects are outlined. Blue light‐emitting electrochemical cells (LECs) incorporating iridium(III) complexes have been extensively researched over the past 15 years, for the ultimate goal of fabricating white LECs for solid‐state lighting. The advances in blue‐iridium(III) complexes used for LECs, and the device engineering on LECs using the complexes, are reviewed. The challenges ahead and future prospects are also discussed.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201907169