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<p>Polypyrrole (PPy) and aluminum(8-hydroxyquinolineate) (Alq3) are both promising materials in the field of organic electronics. PPy is characterized by high electrical conductivity and good environmental stability, while Alq3 is known for its excellent optical properties and is one of the most common materials used in the fabrication of organic light-emitting diodes (OLEDs). This research focuses on the preparation of PPy/Alq3 composite thin films using spin-coating technology and investigating the effect of mixing ratios and heat treatment (annealing) on the morphological and structural properties of these films. Scanning field electron microscopy (FESEM) analysis revealed that the prepared films exhibit homogeneity and a smooth surface, with minimal effect of annealing on the overall morphology. X-ray diffraction (XRD) analysis showed that Alq3 retains its amorphous nature in all samples, while PPy exhibits characteristic diffraction peaks indicating its semi-crystalline nature. It was also observed that annealing leads to an increase in the intensity of the PPy peaks, reflecting an improvement in the polymer’s microcrystalline structure. These results suggest the potential use of these composites in various optoelectronic applications, particularly in organic solar cells and sensors.</p>

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Influence of mixing ratio and annealing on the structural and morphological properties of spin-coated PPy/Alq3 composite thin films for photovoltaic applications

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Mustafa M. A. Hussein,
  • Lamia K. Abbas,
  • Ameer F. Abdulameer,
  • Raied K. Jamal

摘要

Polypyrrole (PPy) and aluminum(8-hydroxyquinolineate) (Alq3) are both promising materials in the field of organic electronics. PPy is characterized by high electrical conductivity and good environmental stability, while Alq3 is known for its excellent optical properties and is one of the most common materials used in the fabrication of organic light-emitting diodes (OLEDs). This research focuses on the preparation of PPy/Alq3 composite thin films using spin-coating technology and investigating the effect of mixing ratios and heat treatment (annealing) on the morphological and structural properties of these films. Scanning field electron microscopy (FESEM) analysis revealed that the prepared films exhibit homogeneity and a smooth surface, with minimal effect of annealing on the overall morphology. X-ray diffraction (XRD) analysis showed that Alq3 retains its amorphous nature in all samples, while PPy exhibits characteristic diffraction peaks indicating its semi-crystalline nature. It was also observed that annealing leads to an increase in the intensity of the PPy peaks, reflecting an improvement in the polymer’s microcrystalline structure. These results suggest the potential use of these composites in various optoelectronic applications, particularly in organic solar cells and sensors.