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Tuning the Optical Properties of MEH–PPV/PFO Hybrid Thin Films via the Incorporation of $CsPbBr_{3}$ Quantum Dots
| Content Provider | MDPI |
|---|---|
| Author | Qaid, Saif M. H. Al-Asbahi, Bandar Ali Ghaithan, Hamid M. Aldwayyan, Abdullah S. |
| Copyright Year | 2021 |
| Description | The current work examines the effects of cesium lead bromide (CsPbBr3) perovskite quantum dots (PQDs) on the structural and optical properties of conjugated polymer blends of poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene] (MEH–PPV) and 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.% and 10 wt.% were prepared via a solution-blending method prior to spin-coating on glass substrates. The MEH–PPV/PFO composites’ crystallinity was improved, and the roughness was dramatically increased with higher PQDs content, as confirmed by X-ray diffraction (XRD) and atomic force microscopy (AFM), respectively. Conversely, a higher PQDs content resulted in a gradual reduction of the Urbach tail and an increase in the steepness parameter, thereby reducing the localized density of the electronic states within the forbidden bandgap of the hybrids. Moreover, a slight reduction in the direct and indirect bandgaps was found in PQDs/(MEH–PPV/PFO) composite films containing a higher PQDs content and provided evidence of the low concentration of the localized states. The incorporation of the PQDs resulted in enhanced non-radiative energy transfer processes in the MEH–PPV/PFO hybrids, which are very important for the development of optimized optoelectronic devices. |
| Starting Page | 154 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11020154 |
| Journal | Coatings |
| Issue Number | 2 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-01-29 |
| Access Restriction | Open |
| Subject Keyword | Coatings Inorganic Chemistry Cspbbr3 Perovskite Quantum Dots Meh–ppv/pfo Conjugated Polymers Composite Light-emitting Materials Tunable Bandgap |
| Content Type | Text |
| Resource Type | Article |
