White light emitting diode component having two phosphors and related phosphor and formation method

Abstract

A white light emitting diode component capable of emitting white light includes an LED chip capable of emitting luminescent light, a first phosphor for absorbing first luminescent light of the luminescent light and emitting first emission, and a second phosphor for absorbing second luminescent light of the luminescent light and emitting second emission. A blend of the luminescent light (except for the first and the second luminescent light) and the first and the second emissions forms the white light. The first phosphor has a chemical formula of (Ca 1-x-y Eu x M y )Se, where x is not equal to zero, y is between zero and one, and M is composed of at least one element selected from a group consisting of Be, Mg, Sr, Ba, and Zn.

1 . A phosphor formation method comprising:
 providing CaCO 3 , Eu 2 O 3 , and Se powder;   grinding and blending CaCO 3 , Eu 2 O 3 , Se powder, and reactants comprising one element selected from a group consisting of Be, Mg, Sr, Ba, and Zn;   placing the ground and blended CaCO 3 , Eu 2 O 3 , and Se powder in a reduction atmosphere;   heating the ground and blended CaCO 3 , Eu 2 O 3 , and Se powder in the reduction atmosphere at a predetermined rate of temperature increase to a predetermined temperature, and performing a reduction sintering process for a predetermined period to form a chemical compound; and   cooling the chemical compound at a predetermined rate of temperature decrease to room temperature, forming phosphor having a chemical formula of (Ca 1-x-y Eu x M y )Se where x is not equal to zero, y is between zero and one, and M comprises one element selected from a first group consisting of Be, Mg, Sr, Ba, and Zn.   
     
     
         2 . The phosphor formation method of  claim 1 , wherein the predetermined temperature is between 1000-1600 degrees Celsius. 
     
     
         3 . The phosphor formation method of  claim 1 , wherein the predetermined period is between 3-24 hours. 
     
     
         4 . The phosphor formation method of  claim 1 , wherein the reduction atmosphere comprises hydrogen and nitrogen gas. 
     
     
         5 . The phosphor formation method of  claim 1 , wherein the reduction atmosphere comprises hydrogen and argon gas. 
     
     
         6 . The phosphor formation method of  claim 1 , wherein the predetermined rate of temperature increase is equal to 5° C./second. 
     
     
         7 . The phosphor formation method of  claim 1 , wherein the predetermined rate of temperature decrease is equal to 5° C./second.