Quantum chemistry and QSPR study on relationship between crystal structure and emission wavelength of Eu2+-doped phosphors

Hiroaki Onuma, Itaru Yamashita, Kazumi Serizawa, Hiroaki Tanno, Ai Suzuki, Hideyuki Tsuboi, Nozomu Hatakeyama, Akira Endou, Hiromitsu Takaba, Momoji Kubo, Hiroshi Kajiyama, Akira Miyamoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The relationship between crystal structures and emission properties has been computationally investigated for Eu 2+-doped phosphors. The electronic structure of the Eu 2+-doped BaMgAl 10O 17 phosphor was analyzed by using the quantum chemistry method. The different effects of O and Ba atoms on the Eu 5d states were determined. The presence of O and Ba atoms increases and decreases the energy level of the Eu 5d orbital by forming anti-bonding and bonding interactions, respectively. According to the electronic-structure analysis, the structure index that represents the local geometrical information of the Eu atom was defined. The relationship between the crystal structures and the emission wavelengths of the 16 Eu 2+-doped oxide phosphors were studied by using the quantitative structure-property relationship (QSPR). The QSPR model suggested that the both O and alkaline-earth atoms around the Eu atom are of importance in the determination of the emission wavelength. The interaction between the Eu and the nearest O atoms make the Eu 2+ emission wavelength short. On the other hand, the interaction from the alkaline-earth atoms around the Eu atom lengthens the Eu 2+ emission wavelength. This evaluation method is useful in selecting the host material that indicates a desirable emission wavelength of the Eu 2+-doped phosphors.

Original languageEnglish
Pages (from-to)301-309
Number of pages9
JournalJournal of the Society for Information Display
Volume18
Issue number4
DOIs
Publication statusPublished - 2010 Apr 1

Keywords

  • Computational chemistry
  • Crystal structure
  • Emission wavelength
  • Eu -doped phosphor
  • QSPR
  • Quantum chemistry

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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