Yuguang Ma, Hsiu-Yi Chao, Ying Wu, S. T. Lee, Wing-Yiu Yu and Chi-Ming Che
A tetranuclear zinc(II) compound with 7-azaindolate (AID) as a bridging ligand exhibits an intense blue emission at 425 nm with a quantum yield of 0.21 in acetonitrile solution at room temperature; a blue-light emitting diode based on the Zn(II) complex as the active emitting layer attains an EL efficiency of 0.25% and brightness of 88 cd m–2 at 7.1 V driving voltage with current density of 10 mA cm–2.