In this paper, the photophysical properties of a hybrid material, composed of a conjugated polymer and perovskite nanocrystals, are investigated by ultrafast spectroscopy and morphological characterization. The relaxation dynamics of a drop‐casted film from the semiconducting polythiophene (P3HT) and a green‐emitting CsPbBr3 (zwitterionic sulfobetaine ‐capped) perovskite nanocrystals (NCs) solution is studied. The transient spectroscopy presents a very long photobleaching signal peaked at 516 nm not present in the single components of the blend. The scanning electron and confocal fluorescence microscopy images show that the P3HT and the CsPbBr3 NCs are finely mixed in the film. The presence of a very efficient hole transfer from the nanocrystal to the polymeric chain that induces the formation of a long ‐lived charge‐transfer state as shown in the pump‐probe measurements is proposed. The …