Samsung Sdi Co., Inc.

Samsung Display Devices Co., Ltd.

Il Yu

Kyu-chan Park

Yong-Chan You

Mi-ran Song

Sang-hyuk Lee

Young-chul You

Young-Chul You

Young Chul You

Phosphors having improved luminance and long lifespan

A low-voltage excited red phosphor of the present invention has a matrix including an oxide of an alkaline earth metal and titanium and doping elements including a rare-earth element, a group 13 element, and Zn. The phosphor has an improved lifetime and high brightness.

Low-voltage excited red phosphor and method of preparing the same

Phosphors having longer lifespan

Phosphors having improved luminance and longer lifespan

Disclosed is a low-voltage blue color fluorescent substance which is doped with 0.5 to 3 weight % of P, and a manufacturing method of the same. The above blue color fluorescent substance is manufactured by mixing phosphoric compound as flux with a mixture of zinc oxide (ZnO) and gallium oxide (Ga O ); carrying out a primary burn on the mixture at a temperature of 1,200 to 1,300&deg; C.; ball milling and washing; and carrying out a secondary burn on the resultant material at a temperature of 900 to 1,100&deg; C., and then classifying the substance.

High luminance blue color fluorescent substance for low-voltage and manufacturing method of the same

A low-voltage excited blue phosphor is provided. The phosphor comprises a matrix represented by general formula ZnO.Ga,O,, and Bi doped in the matrix. To prepare the phosphor, ZnO, Ga,O,, Bi compound, and a flux are mixed to produce a mixture, and the mixture is fired at 1100-1300&deg; C. to produce a fired material. Then the fired material is milled, and washed with an acid. The washed material is fired at 800-1100&deg; C. and sieved to produce the blue phosphor.

Low-voltage excited blue phosphor and method of preparing the same

Disclosed is a low voltage blue emitting phosphor and a method for producing the same including the steps of: mixing ZnO, Ga,O,and a Na-based compound to obtain a mixture material; sintering the material at a temperature of 1100 to 1300&deg; C.; milling the first sintered material; washing the milled material using hydrochloric acid; sintering the washed material at a temperature of 800 to 1100&deg; C.; and classifing the material. The low voltage blue emitting phosphor produced as described above is a ZnO&mdash;Ga,O,matrix doped with Na, and has an x value of 0.18&plusmn;0.05 and a y value of 0.17&plusmn;0.05 in a CIE chromaticity diagram.

Low voltage blue emitting phosphor and method of preparing same

A phosphor for a low voltage display device having a host and a metal salt or metal oxide dispersed on the surface of the host with improved luminescence efficiency which can be prepared at a low temperature.

Growing community of inventors

Suwon, South Korea

Il Yu