Citation: Peng Jun LIU, Ying Liang LIU. Preparation of CaS:Eu²⁺ Phosphor by Microwave Heating Method and its Luminescence[J]. Chinese Chemical Letters, ;2000, 11(9): 843-846. shu

Preparation of CaS:Eu²⁺ Phosphor by Microwave Heating Method and its Luminescence

Peng Jun LIU ^b ,
Ying Liang LIU ^a

a Department of Chemistry, Jinan University, Guangzhou 510632;
b Department of Chemistry, Hainan Normal College, Haikou 571158

Received Date: 25 February 2000

Fund Project: This work was supported by the National Natural Science Foundation of China (No 59982003) and Guangdong Provincial Natural Science Foundation of China (No 990484).

This is the first report of using the microwave heating technique to synthesize calcium sulphide activated by europium whose structure is determined as the face-centered cubic by conventional X-ray powder diffraction method.The phosphor has maximum excitation peaks located at 280 nm and 560 nm and the maximum emission of the phosphor is 630 nm.When the concentration of Eu²⁺ in CaS increases from 1.0×10^-5 to 1.0×10^-2 mole per mole host, the body colour of the calcium sulphide activated with europium changes from white, through light-red to pink to deep-red.The phosphor obtains the longest afterglow at the concentration of 0.1% Eu²⁺-doped and is a kind of good material excited by sunlight.
- Microwave radiation heating,
- calcium sulphide,
- europium,
- luminescence
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