Tuning the Optical Properties of MEH–PPV/PFO Hybrid Thin Films via the Incorporation of CsPbBr3 Quantum Dots

The current work examines the effects of cesium lead bromide (CsPbBr3) perovskite quantum dots (PQDs) on structural and optical properties conjugated polymer blends poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene] (MEH–PPV) poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO). MEH–PPV/PFO composite thin-films containing PQDs with weight ratios between 0.5 wt.% 10 were prepared via a solution-blending method prior to spin-coating glass substrates. composites’ crystallinity was improved, roughness dramatically increased higher content, as confirmed by X-ray diffraction (XRD) atomic force microscopy (AFM), respectively. Conversely, content resulted in gradual reduction Urbach tail an increase steepness parameter, thereby reducing localized density electronic states within forbidden bandgap hybrids. Moreover, slight direct indirect bandgaps found PQDs/(MEH–PPV/PFO) films provided evidence low concentration states. incorporation enhanced non-radiative energy transfer processes hybrids, which are very important for development optimized optoelectronic devices.