Two novel orange cationic iridium(III) complexes with multifunctional ancillary ligands used for polymer light-emitting diodes

► The complexes contain carrier-transporting and crystallization-resistant functional groups. ► Glass-transition temperatures are 267 °C and 195 °C. ► The maximum current efficiencies are 9.1 cd A−1 and 10.0 cd A−1. ► The maximum external quantum efficiencies are 6.5% and 7.1%. ► The maximum luminance are 2314 cd m−2 and 3157 cd m−2.