Investigation of Kelvin Probe Force Microscopy and optical properties of F8BT polymer incorporated with ZnONR/AgNP nanocomposite

Results in Materials Pub Date : 2025-04-16 DOI:10.1016/j.rinma.2025.100707

Ishaq Musa

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Abstract

The optical properties and work function of poly(9,9-dioctylfluorene-co-benzothiadiazole) (F8BT) and its nanocomposites with ZnO nanorods (ZnONRs) and silver nanoparticles (AgNPs) were extensively studied using techniques such as Scanning Probe Microscopy (SPM) and optical spectroscopy. Kelvin Probe Force Microscopy (KPFM) measurements revealed significant differences in contact potential and a work function of around 4.484 eV for pure F8BT. Furthermore, optical absorption measurements showed increased absorbance and noticeable changes in bandgap when AgNPs and ZnONRs were added, indicating improved light-absorbing properties of the nanocomposites. The band gap of F8BT is typically around 2.50 eV, but the introduction of ZnO nanorods increases it to 2.63 eV. This could be due to the interaction between F8BT and ZnONRs. Additionally, the incorporation of silver nanoparticles (AgNPs) further raises the band gap to 2.66 eV. Analysis of the Photoluminescence (PL) spectra reveals a significant increase in emission intensity for the F8BT/AgNP/ZnONR combination, attributed to exciton recombination and the impact of localized surface Plasmon resonance in the nanocomposites.

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ZnONR/AgNP纳米复合材料F8BT聚合物的开尔文探针力显微镜及光学性能研究

利用扫描探针显微镜（SPM）和光谱学等技术研究了聚（9,9-二辛基芴-co-苯并噻唑）（F8BT）及其与ZnO纳米棒（ZnONRs）和银纳米棒（AgNPs）的纳米复合材料的光学性质和功函数。开尔文探针力显微镜（KPFM）测量显示，纯F8BT的接触电位和功函数在4.484 eV左右存在显著差异。此外，光学吸收测量表明，当添加AgNPs和ZnONRs时，吸光度增加，带隙明显变化，表明纳米复合材料的吸光性能得到改善。F8BT的带隙通常在2.50 eV左右，但ZnO纳米棒的引入使其增加到2.63 eV。这可能是由于F8BT和znonr之间的相互作用。此外，银纳米颗粒（AgNPs）的掺入进一步将带隙提高到2.66 eV。光致发光（PL）光谱分析表明，F8BT/AgNP/ZnONR组合的发射强度显著增加，这是由于激子重组和纳米复合材料中局部表面等离子体共振的影响。

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来源期刊

Results in Materials

CiteScore

5.30

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0.00%

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