Sensitization in CaS:Bi:Tm phosphors |
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| Authors: | SH Pawar AV Narlikar |
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| Institution: | Materials Research Laboratory, Department of Physics, Shivaji University Kolhapur, India;National Physical Laboratory, New Delhi-12, India |
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| Abstract: | The emission spectra of calcium sulphide phosphors activated with bismuth, thulium, and both together are studied in the spectral range of 4000 Å to 8000 Å. The results indicate resonance transfer of excitation energy from Bi to Tm. Sensitizer to sensitizer transfer also appears to be appreciable. A plausible energy level diagram is proposed to explain the sensitization mechanism. |
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