PHOSPHOR - TOSHIBA CORP

Title:

PHOSPHOR

Document Type and Number:

Japanese Patent JP2013216909

Kind Code:

A

Abstract:

To provide a phosphor with high quantum efficiency, and good temperature characteristics.

A phosphor comprises an inorganic compound having a composition including a metal element M, a trivalent element M¹ different from the metal element M, a tetravalent element M² different from the metal element M and either or both of O and N, where a part of the metal element M is replaced with an emission center element. A crystal structure of the phosphor has substantially the same crystal structure of Sr₃Al₃Si₁₃O₂N₂₁, lengths of chemical bonds M¹-N and M²-N are each within ±15% compared to lengths of Al-N and Si-N calculated from a lattice constant and atomic coordinate of Sr₃Al₃Si₁₃O₂N₂₁. This phosphor exhibits an emission peak between wavelengths of 490 nm and 580 nm, when excited with a light of 250-500 nm wavelength.

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Inventors:

FUKUDA YUMI
ASAI HIRONORI

Application Number:

JP2013137151A

Publication Date:

October 24, 2013

Filing Date:

June 28, 2013

Export Citation:

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Assignee:

TOSHIBA CORP

International Classes:

C09K11/64

Foreign References:

WO2007105631A1

2007-09-20

Attorney, Agent or Firm:

Hirohito Katsunuma
Yukitaka Nakamura
Noritaka Yokota
Hideaki Maekawa

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