AI Article Synopsis
- The study explores how titanium dioxide (TiO) nanoparticles impact the light-emitting qualities of a specific ternary blend of three conjugated polymers, which include poly(9,9-dioctylfluorene-2,7-diyl) (PFO).
- The researchers used a solution-blending technique and spin-coating to prepare thin films, achieving a strong white light emission through Förster Resonance Energy Transfer (FRET) in a specific blend ratio.
- Adding up to 10 weight percent of TiO nanoparticles significantly enhanced the white light emission, but higher concentrations caused a decrease in brightness due to clumping of the nanoparticles, while also affecting the electrical characteristics of the films.
Article Abstract
The effect of TiO nanoparticles on the photophysical properties of ternary conjugated polymer (CP) blends of poly(9,9-dioctylfluorene-2,7-diyl) (PFO), poly 9,9-dioctylfluorene-alt-benzothiadiazole (F8BT) and poly(2-methoxy-5(2-ethylhexyl)-1,4 -phenylenevinylene (MEH-PPV) thin films was investigated. This ternary blend used a fixed amount of PFO as the donor with MEH-PPV and F8BT in various ratios as the acceptors. The solution-blending method and the spin-coating technique were used to prepare the blends and the thin films, respectively. Through efficient Förster Resonance Energy Transfer (FRET), the desired white emission was achieved with PFO/0.3 wt.% F8BT/0.5 wt.% MEH-PPV ternary blend thin film. Additions of nanoparticles up to 10 wt.% dramatically intensified the white emission which then dimmed at higher contents due to agglomerations. The current density-voltage characteristics of the nanocomposite thin films exhibited dependency on the content and distributions of the nanoparticles. Finally, a possible underlying mechanism for the intensification of emission is proposed.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7570283 | PMC |
| http://dx.doi.org/10.3390/polym12092154 | DOI Listing |
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