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Absorption (dashed line) and PL (solid line) spectra of and PL spectrum of film (dotted line). Inset: Molecular structure of .
(solid) and luminescence-voltage (open) characteristics of the light-emitting diodes (LEDs) based on blend of 3.5 wt % in . The triangle corresponds to a LED with structure , the rectangular to , while the circle to .
(a) Ir-complex doping concentration dependence of EL spectra at forward bias 8 V, for devices and (b) Ir-complex doping concentration dependence of PL spectra excited at 320 nm. Curves are vertically and horizontally displaced for clarity; spikes at are caused by deflected second-order excitation light.
(a) and characteristics of the LEDs with different concentrations and (b) (solid) and (open) characteristics of the LEDs with different concentrations. The device structure is: .
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