Luminescent characteristics of green emitting Li 2Ca 2Si 2O 7:Eu 2+ phosphor

Ju Seong Kim, Hee Jo Song, Hee Suk Roh, Dong Kyun Yim, Jun Hong Noh, Kug Sun Hong

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We present a novel green emitting phosphor of Eu 2+-doped Li 2Ca 2Si 2O 7 which can be excited by ultra-violet light. The phosphors were synthesized at the low temperature of 900°C without any impurity phases by a solid-state reaction. The phosphor shows broad green emission centered at 520 nm under excitation at 350 nm. We found in the phosphor that the critical quenching concentration of Eu 2+ and the critical distance of energy transfer between Eu 2+ ions are 0.5 mol% and 56.2 Å, respectively. The thermal activation energy of the green luminescence was also measured to be 0.51 eV. The present work suggests that the Li 2Ca 2Si 2O 7:Eu 2+ phosphor is a kind of potential green-emitting phosphor.

Original languageEnglish
Pages (from-to)112-115
Number of pages4
JournalMaterials Letters
Volume79
DOIs
Publication statusPublished - 2012 Jul 15
Externally publishedYes

Fingerprint

Phosphors
phosphors
Solid state reactions
ultraviolet radiation
Energy transfer
Luminescence
Quenching
Activation energy
energy transfer
quenching
Impurities
Ions
luminescence
activation energy
solid state
impurities
excitation
ions
Temperature

Keywords

  • Li Ca Si O
  • Photoluminescence
  • Silicate phosphor
  • White UV-LED

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Luminescent characteristics of green emitting Li 2Ca 2Si 2O 7:Eu 2+ phosphor. / Kim, Ju Seong; Song, Hee Jo; Roh, Hee Suk; Yim, Dong Kyun; Noh, Jun Hong; Hong, Kug Sun.

In: Materials Letters, Vol. 79, 15.07.2012, p. 112-115.

Research output: Contribution to journalArticle

Kim, Ju Seong ; Song, Hee Jo ; Roh, Hee Suk ; Yim, Dong Kyun ; Noh, Jun Hong ; Hong, Kug Sun. / Luminescent characteristics of green emitting Li 2Ca 2Si 2O 7:Eu 2+ phosphor. In: Materials Letters. 2012 ; Vol. 79. pp. 112-115.
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AU - Song, Hee Jo

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AU - Noh, Jun Hong

AU - Hong, Kug Sun

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AB - We present a novel green emitting phosphor of Eu 2+-doped Li 2Ca 2Si 2O 7 which can be excited by ultra-violet light. The phosphors were synthesized at the low temperature of 900°C without any impurity phases by a solid-state reaction. The phosphor shows broad green emission centered at 520 nm under excitation at 350 nm. We found in the phosphor that the critical quenching concentration of Eu 2+ and the critical distance of energy transfer between Eu 2+ ions are 0.5 mol% and 56.2 Å, respectively. The thermal activation energy of the green luminescence was also measured to be 0.51 eV. The present work suggests that the Li 2Ca 2Si 2O 7:Eu 2+ phosphor is a kind of potential green-emitting phosphor.

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