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New copper complex can lead to cheaper OLEDs

Researchers from RIKEN (Japan) developed a new efficient copper complex that can be used to replace Iridium phosphors in OLEDs - and would be much cheaper (copper is about 1/2000 cheaper than Iridium).

Copper turned into an efficient emitter

The researchers altered the molecular environment in which the copper sites - wrapping each copper ion with a newly designed organic ligand. The ligand forced the copped to become three-coordinate (three bonds to the ligand), rather than the usual four. This caused the efficiency (EQE) of the copper complex to increase dramatically.

The researchers developed a green emitter, and now their plan is to proceed to create red and blue ones as well.

Source, via Nanowerk


Hi there, 


is there any scientific reference you may provide ? ( sci. paper for example ? or authors? ) 



Here's the original paper : 

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