is conserved in the evaporated thin films. At a doping concentration (cD) of 30 wt%, both meridional complexes showed a lPL at 426 nm, accompanied by high and low energy shoulders at 404 nm and 450 nm, respectively (Figure ). The full width at half maximum (FWHM) of the emission spectra of both complexes is 62 nm (0.42 eV). In the neat film, the emission broadened slightly to FWHM = 70 nm (0.47 eV). The facial complex fac-Ir(tfpi_Bn)3 showed shorter wavelength emission than the other materials (λPL = 420 nm) in 6 wt% doped film in TSPO1, consistent with the trend observed in acetonitrile solution. The meridional isomers showed high FPL in doped films, with FPL of 68% and 75%, respectively, for mer-Ir(tfpi_Bn)3