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Cholesteric liquid crystals (CLCs) show selective reflection, circular dichroism and optical rotation properties due to their intrinsic self-assembled helical superstructures. Due to such unique optical properties, CLCs remain in limelight for their utility in displays, photonic devices and sensors. Interestingly, they are also observed to show photoluminescence (PL). However, the tunability of PL in terms of spectral peak and intensity is not ample and in turn limits their applications in PL based devices. In the recent past, the doping of nanoparticles (NPs) into CLCs and polymer stabilised CLCs (PSCLCs) has been greatly investigated in order to improve upon the PL of CLCs/PSCLCs. Therefore, in this chapter, we have provided a comprehensive overview of the impact of doping of various types of NPs on the PL of CLCs/PSCLCs. For instance, enhancement in the PL intensity, quantum yield and spectral peak and reduction in the full width and half maximum in NPs doped CLC/PSCLCs composites would be reviewed in a greater detail. We believe that the ability to fine-tune the PL of CLCs/PSCLCs using NPs would certainly pave the way forward for their potential use in the numerous next-generation high-performance luminescent displays, tunable photonic devices and sensing applications.

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Tunable Photoluminescence of Nanoparticles Doped Cholesteric Liquid Crystals Composites for Photonic Applications

  • 章节

  • 发表日期：

    2025年

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  • P. Priscilla,
  • Arvind K. Gathania,
  • Jai Prakash,
  • Supreet,
  • Ajay Kumar,
  • Riccardo Castagna,
  • Sandeep Kumar,
  • Gautam Singh

摘要

Cholesteric liquid crystals (CLCs) show selective reflection, circular dichroism and optical rotation properties due to their intrinsic self-assembled helical superstructures. Due to such unique optical properties, CLCs remain in limelight for their utility in displays, photonic devices and sensors. Interestingly, they are also observed to show photoluminescence (PL). However, the tunability of PL in terms of spectral peak and intensity is not ample and in turn limits their applications in PL based devices. In the recent past, the doping of nanoparticles (NPs) into CLCs and polymer stabilised CLCs (PSCLCs) has been greatly investigated in order to improve upon the PL of CLCs/PSCLCs. Therefore, in this chapter, we have provided a comprehensive overview of the impact of doping of various types of NPs on the PL of CLCs/PSCLCs. For instance, enhancement in the PL intensity, quantum yield and spectral peak and reduction in the full width and half maximum in NPs doped CLC/PSCLCs composites would be reviewed in a greater detail. We believe that the ability to fine-tune the PL of CLCs/PSCLCs using NPs would certainly pave the way forward for their potential use in the numerous next-generation high-performance luminescent displays, tunable photonic devices and sensing applications.