Phosphors for White LEDs in the Next Stage

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概要

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• This paper reviews physical pictures of phosphor materials, which can meet requirements of diversified white-LED applications in the next stage. Suppression of thermal quenching and suitable band width of luminescence are the main concern. Basically tight space around an emitting ion and rigid chemical bonding can improve thermal quenching and narrow the band width. There are, however, other factors such as delocalization of an excited state leading to nanradiative processes. Preferable properties are discussed with reference to examples, e.g. La_2O_2S:Eu^<3+>, Y_3Al_5O_<12>:Ce^<3+> and CaAlSiN_3:Eu^<2+>, which show a difference in quenching temperature and β-SiAlON:Eu^<2+>, which has a narrow band width.

• 社団法人照明学会の論文

著者

• UHEDA Kyota

  School of Bionics, Tokyo University of Technology

• YAMAMOTO Hajime

  Tokyo Engineering University

• Yasuda Satoshi

  Tokyo University Of Technology School Of Bionics:(present Office)stanley Electric Co. Ltd.

• Yamamoto Hajime

  School Of Bionics Tokyo Univ. Of Technol.

• UHEDA Kyota

  Tokyo University of Technology, School of Bionics

関連論文

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• An analysis of crystal structure of Ca-deficient oxonitridoaluminosilicate, Ca_Al_Si_N_O_
• Energy Transfer between Gd3+ and Other Rare-earth Ions in GdPO4 under Vacuum UV Excitation

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