Luminescence properties of nanophosphors: metal ion-doped sol-gel silica glasses

• Autorzy: Morita M. , Rau D. , Kajiyama S. , Sakurai T. , Baba M. , Iwamura M.
• Języki publikacji: EN

Abstrakty

EN

Photoluminescence of xerogel and sol-gel SiO2 glasses doped with metal ions, metal complexes and semiconductor nanocrystals are investigated at 300 K and 10 K to clarify the optical properties and the electronic structures of nanophosphors. Sol-gel glasses doped with 3d, 4d and 5d transition metal ions exhibit a bright luminescence with various colours due to the 3LMCT transition associated with closed -shell molecular complex centres. Luminescence from rare earth(III) complexes doped in the same matrix serve as a sensitive probe to determine axial and chiral complex structures. Luminescence properties are investigated of doped semiconductors ZnS: Cu, Al dispersed as nanocrystalline green phosphors in xerogel with various lifetime components. The sol-gel silica-based phosphors are characterized by unusual valence states of the transition metal ions, stable centres in organic-inorganic hybrid hosts and the 500 ps lifetimes of D-A pairs due to spd hybridization effects in semiconductor nanocrystals.

Słowa kluczowe

EN

luminescence; sol-gel glass; nanocrystal; LMCT; phosphor

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2004
• Tom: Vol. 22, No. 1
• Strony: 5--15
• Opis fizyczny: Bibliogr. 25 poz.

Twórcy

autor

Morita M.

• Department of Applied Chemistry, Seikei University, Kichijoji, Musashino-shi,Tokyo 180-8633, Japan

autor

Rau D.

• Department of Applied Chemistry, Seikei University, Kichijoji, Musashino-shi,Tokyo 180-8633, Japan

autor

Kajiyama S.

• Department of Applied Chemistry, Seikei University, Kichijoji, Musashino-shi,Tokyo 180-8633, Japan

autor

Sakurai T.

• Department of Applied Chemistry, Seikei University, Kichijoji, Musashino-shi,Tokyo 180-8633, Japan

autor

Baba M.

• 2ISSP, The University of Tokyo, Kashiwa 277-8581, Chiba, Japan

autor

Iwamura M.

• Department of Applied Chemistry, Seikei University, Kichijoji, Musashino-shi,Tokyo 180-8633, Japan

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