Please use this identifier to cite or link to this item:
http://nopr.niscpr.res.in/handle/123456789/20091| Title: | Synthesis and photoluminescent characteristics of yellow ZnS:Cu,Cl phosphor |
| Authors: | Sharma, Gaytri Sharma, Anita Singh, Devender Singh, Ishwar Rhee, Young-Woo Han, Sang-Do |
| Issue Date: | Mar-2005 |
| Publisher: | NISCAIR-CSIR, India |
| IPC Code: | Int. Cl.7 C09K11/54 |
| Abstract: | A yellow ZnS:Cu,Cl phosphor has been prepared using two firing steps. Firing ZnS in the presence of activator CuSO4 and the flux BaCl2, MgCl2 and NaCl in the mole percentage ratio of 13.8: 39.9:46.2 at 1150°C for 5 h in N2 atmosphere produces a wurtzite structure of the ZnS matrix with the particle size above 25 μm. The phosphor shows photoluminescence emitting light at 540 nm, but does not show any electroluminescence property at this stage. Second step firing at 750°C in the presence of CuSO4 and MgCl2, not only increases the photoluminescent brightness but also produces electroluminescence. The morphology of the ZnS matrix changes from wurtzite to sphalerite after second firing. Sphalerite structure for ZnS:Cu,Cl phosphor is essential for producing electroluminescence. |
| Page(s): | 447-450 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.44A(03) [March 2005] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 44A(3) 447-450.pdf | 421.68 kB | Adobe PDF | View/Open |
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