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<p>Bis (8-hydroxyquinoline) copper (CuQ<sub>2</sub>) is an important organometallic complex based on a central metal cation coordinated to quinolate ligands. However, CuQ<sub>2</sub> exhibits limitations such as low fluorescence intensity, short fluorescence lifetime, and low efficiency of visible light absorption. In this study, density functional theory (DFT) calculations were performed to investigate the frontier molecular orbitals of CuQ<sub>2</sub>, revealing its potential for excellent luminescence properties. Subsequently, CuQ<sub>2</sub> was synthesized using physical vapor deposition (PVD), yielding micron-sized CuQ<sub>2</sub> particles. CuQ<sub>2</sub> micron particles were characterized using scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), ultraviolet visible spectroscopy (UV–Vis), photoluminescence and fluorescence lifetime. The results demonstrate that the deposition temperature significantly influences the morphology, thermal stability and fluorescence properties of CuQ<sub>2</sub>. At a deposition temperature of 200&#xa0;°C, the CuQ<sub>2</sub>-C sample forms spherical micron particles with uniform morphology, enhanced thermal stability, optimal visible light absorption efficiency, and highest fluorescence intensity. The CuQ<sub>2</sub>-C sample exhibits a maximum emission wavelength of 660&#xa0;nm, a maximum excitation wavelength of 333&#xa0;nm, and a fluorescence lifetime of 10.646&#xa0;μs.</p> Graphical abstract <p></p>

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Study on luminescence characterization of physical vapor deposition-modified bis (8-hydroxyquinoline) copper

  • 期刊论文

  • 发表日期：

    2024年12月31日

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  • Xiaojie Liang,
  • Yanwen Ding,
  • Laixi Luo,
  • Wenyu Hu,
  • Fulian Li,
  • Yumin Song,
  • Kunyong Kang

摘要

Bis (8-hydroxyquinoline) copper (CuQ2) is an important organometallic complex based on a central metal cation coordinated to quinolate ligands. However, CuQ2 exhibits limitations such as low fluorescence intensity, short fluorescence lifetime, and low efficiency of visible light absorption. In this study, density functional theory (DFT) calculations were performed to investigate the frontier molecular orbitals of CuQ2, revealing its potential for excellent luminescence properties. Subsequently, CuQ2 was synthesized using physical vapor deposition (PVD), yielding micron-sized CuQ2 particles. CuQ2 micron particles were characterized using scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), ultraviolet visible spectroscopy (UV–Vis), photoluminescence and fluorescence lifetime. The results demonstrate that the deposition temperature significantly influences the morphology, thermal stability and fluorescence properties of CuQ2. At a deposition temperature of 200 °C, the CuQ2-C sample forms spherical micron particles with uniform morphology, enhanced thermal stability, optimal visible light absorption efficiency, and highest fluorescence intensity. The CuQ2-C sample exhibits a maximum emission wavelength of 660 nm, a maximum excitation wavelength of 333 nm, and a fluorescence lifetime of 10.646 μs.

Graphical abstract