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Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Photoluminescence: Fluorescence and Phosphorescence01:23

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Related Experiment Video

Updated: Apr 24, 2026

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
13:51

Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

Published on: November 10, 2017

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Enhancing luminescence in lanthanide-doped upconversion nanoparticles.

Sanyang Han1, Renren Deng, Xiaoji Xie

  • 1Department of Chemistry, National University of Singapore, Science Drive 3, Singapore 117543 (Singapore).

Angewandte Chemie (International Ed. in English)
|September 11, 2014
PubMed
Summary

Lanthanide-doped upconversion nanoparticles offer exciting applications but face low efficiency challenges. Recent advances in controlling energy transfer and enhancing luminescence show promise for overcoming these hurdles in future research.

Keywords:
dopinglanthanidesnanoparticlesplasmonupconversion

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Lanthanide-doped upconversion nanoparticles (UCNPs) are researched for fundamental optical properties and applications in bioimaging and therapy.
  • Low upconversion conversion efficiency remains a significant experimental challenge in the field of UCNPs.
  • Progress in understanding energy transfer mechanisms has led to strategies for enhancing UCNP luminescence.

Purpose of the Study:

  • To present the principles of controlling energy transfer in lanthanide-doped UCNPs.
  • To overview advances and challenges in improving UCNP luminescence.
  • To discuss future research directions for UCNPs.

Main Methods:

  • Review of experimental and theoretical studies on UCNPs.
  • Analysis of energy transfer mechanisms in lanthanide doping.
  • Discussion of strategies for enhancing upconversion luminescence.

Main Results:

  • Identification of key factors influencing UCNP efficiency.
  • Summary of effective approaches for luminescence enhancement.
  • Highlighting the potential impact of improved UCNPs on various applications.

Conclusions:

  • Controlling energy transfer is crucial for optimizing UCNP performance.
  • Significant progress has been made in enhancing UCNP luminescence.
  • Future research should focus on addressing remaining challenges and exploring new applications.