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Effect of Sm3+ concentration on electroluminescence excitation mechanism in (Zn,Cd) S phosphors |
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| Authors: | J K Nandagawe P K Patil R D Lawangar-Pawar V S Shirodakar |
| Institution: | 1. The New College, 416 002, Kolhapur, India 2. Department of Physics, Shivaji University, 416 004, Kolhapur, India 3. Department of Physics, Institute of Science, 400 032, Bombay, India |
| Abstract: | (Zn, Cd)S phosphors activated with varying concentrations of Sm3+ have been prepared in argon atmosphere, and their voltage dependence of EL-brightness, current-voltage characteristics and SEM measurements have been carried out. The nature of variation of EL-brightness with voltage is found to depend on Sm3+ concentration. The result is interpreted as an effect of increase in number and effectiveness of Mott-Schottky type potential barriers which probably exist at the grain boundaries. |
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