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Basic Mechanisms of Photoluminescence

  • Kartik N. ShindeEmail author
  • S. J. Dhoble
  • H. C. Swart
  • Kyeongsoon Park
Chapter
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 174)

Abstract

The phenomena which involve absorption of energy and subsequent emission of light are classified generically under the term luminescence. Phosphors are luminescent materials that emit light when excited by radiation, and are usually microcrystalline powders or thin-films designed to provide visible color emission. After decades of research and development, thousands of phosphors have been prepared and some of them are widely used in many areas. Excitation by absorbance of a photon leads to a major class of technically important luminescent species which fluoresce or phosphoresce. In general, fluorescence is “fast” (ns time scale) while phosphorescence is “slow” (longer time scale, up to hours or even days). For convenience, the topic of photoluminescence will be broadly divided into that based on relatively large-scale inorganic materials, mainly exhibiting phosphorescence, and that of smaller dye molecules and small-particle inorganic (“nanomaterials”), which can either fluoresce or phosphoresce. Their applications differ. For many of the derived technical applications, it is irrelevant whether the luminescence is fluorescence or phosphorescence. Either way the current range of applications is extensive, and in one case has been recognized by the award of a Nobel Prize, in 2008.

Keywords

Excited State Host Lattice Luminescent Material High Excited State Phonon Emission 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Kartik N. Shinde
    • 1
    Email author
  • S. J. Dhoble
    • 2
  • H. C. Swart
    • 3
  • Kyeongsoon Park
    • 4
  1. 1.Department of PhysicsN.S. Science and Arts CollegeBhadrawatiIndia
  2. 2.Department of PhysicsR.T.M. Nagpur UniversityNagpurIndia
  3. 3.Department of PhysicsUniversity of the Free StateBloemfonteinSouth Africa
  4. 4.Faculty of Nanotechnology and Advanced Materials EngineeringSejong UniversitySeoulRepublic of Korea (South Korea)

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