Reddish light emitting phosphorescent phosphor
AssigneeNemoto & Co., Ltd.
InventorsAtsunori Hashimoto, Yasushi Aoki
Life of this patent
Estimating the term…
Abstract
Provided is a reddish light emitting phosphorescent phosphor, that is efficiently excited with visible light and is chemically stable. The phosphorescent phosphor comprises a compound represented by MSi2O2N2:Yb,R, wherein M is at least one metal element selected from strontium, calcium, barium, and magnesium, and R is at least one element selected front erbium, holmium, gadolinium, praseodymium, terbium, dysprosium, neodymium, bismuth, scandium, and chromium. The phosphorescent phosphor is an excellent phosphorescent phosphor having a reddish afterglow.
Claims20
A reddish light emitting phosphorescent phosphor, comprising a compound represented by:
- MSi2O2N2:Yb,R;
- wherein:
- M is at least one metal element selected from the group consisting of strontium (Sr), calcium (Ca), barium (Ba), and magnesium (Mg);
- and
- R is at least one element selected from the group consisting of erbium (Er), holmium (Ho), praseodymium (Pr), dysprosium (Dy), neodymium (Nd), bismuth (Bi), scandium (Sc), and chromium (Cr).
Dependencies are inferred from the claim text.