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Chemical structures of Ir–G1 and with . The lower panel shows the absorption spectra of neat films of Ir–G1 (solid lines) and (dotted line); photoluminescence spectra of 20:80 wt % Ir–G1:CBP blend film (solid line) and 20:80 wt % blend film (dotted line). Excitation wavelength 325 nm.
EL spectra of blend devices. Inset shows CIE coordinates of each device.
(a) External quantum efficiency ; (b) power efficiency ; (c) luminance for devices as function of voltage.
Energy level diagram for the materials used.
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