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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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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Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
07:03

Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors

Published on: November 15, 2016

Lanthanide-based emitting materials in light-emitting diodes.

Ana de Bettencourt-Dias1

  • 1Department of Chemistry, University of Nevada, Reno, NV 89557, USA. abd@unr.edu

Dalton Transactions (Cambridge, England : 2003)
|May 31, 2007
PubMed
Summary

Lanthanide ion complexes are increasingly important for light-emitting diodes (LEDs). Their photophysical properties and device architecture are key for efficient, pure-color displays.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photophysics

Background:

  • Interest in luminescent materials for light-emitting diodes (LEDs) surged after efficient electroluminescence from aluminium tris(hydroxyquinoline) in the 1980s.
  • Lanthanide (Ln(III)) ion complexes are emerging as significant materials for LED applications.
  • Reviewing seminal work and recent developments in Ln(III) complexes for emissive layers.

Purpose of the Study:

  • To review the progress and potential of lanthanide ion complexes in LED technology.
  • To highlight the importance of photophysical characterization for material selection.
  • To emphasize the role of device architecture in achieving high performance.

Main Methods:

  • Photophysical characterization of lanthanide complexes in solution and solid states.

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  • Review of existing literature on lanthanide complexes for LEDs.
  • Analysis of device architecture factors influencing charge transport and recombination.

    • Main Results:

    • Lanthanide ion complexes show promise as emissive layers in LEDs.
    • Photophysical properties in both solution and solid states are crucial for determining suitability.
    • Device architecture significantly impacts charge transport, recombination, color purity, and quantum efficiency.

    Conclusions:

    • Lanthanide complexes are viable candidates for next-generation LED emissive layers.
    • Comprehensive photophysical analysis is essential for material selection.
    • Optimized device design is critical for realizing the full potential of these materials in display applications.