Low-voltage, high-brightness and deep-red light-emitting electrochemical cells (LECs) based on new ruthenium(II) phenanthroimidazole complexes

Light-Emitting Electrochemical Cells (LECs) with a simple device structure ITO/Ru complex/Ga: In were prepared by using heteroleptic ruthenium(II) complexes containing 2-(2-hydroxyphenyl)-1(4-bromophenyl)-1h-imidazo[4,5-f][1,10] phenanthroline (hpbpip) as the pi-extended ligand. After ancillary ligand modification, the [Ru(hpbpip)(dmbpy)(2)](ClO4)(2) complex shows a deep red electro-luminescence emission (2250 cd m(-2) at 6 V) centered at 685 nm, 65 nm red-shifted compared to the [Ru(bpy)(3)](ClO4)(2) benchmark red-emitter at a very low turn voltage (2.6 V), demonstrating its potential for low-cost deep-red light sources. Moreover, the PL quantum yield of the [Ru(hpbpip)(bpy)(2)](ClO4)(2) complex was revealed to be higher (0.121) than the benchmark standard [Ru(bpy)(3)](2+) (0.095).


Published in:
DALTON TRANSACTIONS, 45, 17, 7195-7199
Year:
2016
Publisher:
Cambridge, Royal Society of Chemistry
ISSN:
1477-9226
Keywords:
Laboratories:




 Record created 2016-07-16, last modified 2018-03-17


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