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Updated: Jan 21, 2026

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Nanophosphors-Based White Light Sources.

Maura Cesaria1,2, Baldassare Di Bartolo3

  • 1Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, prov.le Via Arnesano, 73100 Lecce, Italy. maura.cesaria@le.infn.it.

Nanomaterials (Basel, Switzerland)
|July 25, 2019
PubMed
Summary

Nanophosphors offer efficient, mercury-free white light (WL) by harnessing quantum effects. Novel undoped and transition metal-doped nanophosphors show promising, nanoscale-dependent WL emission.

Keywords:
nanophosphorssize-dependent spectroscopysolid state lightingun-doped white-light emitterswhite-light emission

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Nanotechnology

Background:

  • Nanophosphors are gaining interest as mercury-free white light (WL) sources due to miniaturization trends.
  • Compared to bulk materials, nanophosphors show reduced concentration quenching and enhanced luminescence.
  • Spatial confinement and high surface-to-volume ratio significantly impact phosphor luminescence properties.

Purpose of the Study:

  • To overview the physics of nanophosphors, focusing on luminescence and white light generation.
  • To discuss strategies for achieving white light emission using nanophosphors.
  • To introduce and compare a new class of rare earth-free nanophosphors for white light emission.

Main Methods:

  • Review of existing literature on nanophosphor physics and luminescence.
  • Analysis of spatial confinement and surface-to-volume ratio effects on luminescence.
  • Comparison of conventional and novel nanophosphor strategies for white light generation.

Main Results:

  • Nanophosphors offer enhanced luminescence efficiency and tunability.
  • Conventional methods for WL include co-doping or mixing red, green, and blue emitting nanophosphors.
  • Novel undoped Y2O3 and Cr-doped garnet nanocrystals exhibit efficient broadband WL emission, a nanoscale phenomenon with an unknown origin.

Conclusions:

  • Nanophosphors are promising for efficient, mercury-free white light sources.
  • A new class of rare earth-free nanophosphors demonstrates superior lighting performance.
  • Further research is needed to understand the origin of the unconventional white light emission in these novel nanophosphors.