Fig. 3: Photophysical characterizations.

a UV-vis absorption, fluorescence and phosphorescence spectra of DPT-IC in toluene solution; b Photoluminescence transient decay curves of DPT-IC in toluene after bubbling nitrogen and oxygen (the inserted one); c The absorption spectra of Ir(ppy)2acac and tCzphB-FI as well as the emission spectra of DPT-IC pristine film and DPT-IC: 10 wt% Ir(ppy)2acac; d The angle dependent PL spectrum of tCzphB-FI in the doped film.