We next determined the PL properties of the complexes as 10 wt% doped films in mCBP (Figure ), This doping concentration and host were chosen as these are representative of the emissive layer in high performance OLEDs. Like the solution-state study, all complexes emitted in the green, with λPL between 510 and 532 nm (Table ). As in solution, there is a modest reduction in the FWHM of the emission of the trimethylsilylsubstituted complexes (FWHM ranging from 74-77 nm or 2540-2700 cm -1 ) in comparison to IrPic (FWHM = 80 nm or 2830 cm -1 ). The CIE coordinates of the doped mCBP files largely mirror those in solution (Figure ). a Measured in degassed acetonitrile with 0.1M TBAPF6, using Pt disk, Pt wire and Ag/Ag + working, counter and reference electrodes respectively. Scan rate = 100 mV/s, and potentials are reported vs SCE using Fc/Fc + as an internal standard (E1/2 (Fc/Fc + ) vs SCE = 0.38 V) . b Measured in dilute toluene solution. c Measured in dilute degassed toluene solution (lexc = 400 nm). d Measured as 10 wt% doped films in mCBP, spin-coated on a quartz substrate from chlorobenzene (lexc = 340 nm). e lexc = 378 nm. f Determined using an integrating sphere (lexc = 340 nm), the estimated uncertainty is ± 5%. g Absorption measurements for IrPic were recorded in DCM solution due to the limited solubility in toluene.