and mer-Ir(tfpi_tmBn)3 at cD of 6 wt%, increasing to 78% and 89% at cD of 16.5 wt%, reaching 78% and 79% at cD of 30 wt%. In neat films, the FPL dropped to 19% and 33%, respectively. Complex fac-Ir(tfpi_Bn)3 showed lower FPL, with FPL of 53%, 80%, 65%, and 12% at cD of 6 wt%, 16.5 wt%, 30 wt% and in neat films, respectively. The doping concentration dependent FPL of the Ir complexes is summarized in Figure . The lifetimes of the three iridium complexes in 16.5 wt% evaporated films in TSPO1 (Table , Figure ) ranged from 3.14-4.18 μs and are similar to those measured in acetonitrile.