| ACPEL용 ZnS:Cu 청색 형광체의 인위적 결함 형성에 따른 결정 상 변화 및 EL 특성 |
| 이명진, 전애경1, 이지영1, 윤기현2 |
선진화학(주) 연구소
1선진화학(주) 연구
2연세대학교 세라믹공학과 |
| Characteristics on EL Properties and Phase Transformation Caused by Artificial Defects on the ZnS:Cu Blue Phosphor for ACPEL |
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| ABSTRACT |
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A blue phosphor(ZnS:Cu) is manufactured by solid state reaction for ACPEL(AC powder EL). The effect of artificial defect on phosphor surface on the ZnO phase conversion and resulting luminescence have been studied. It was found that ZnS:Cu could converse to cubic phase more easily due to the formation of artificial defect on 1st fired phosphor by ball-milling process, resulting in improvement of luminescence of phosphor phosphors under the driven EL condition. We found out an optimized ball-mill condition through considering effect of each ball-mill conditions such as milling time and milling rpm on defect. Also we determined relationship between emission luminescence and phase of phosphor based on analyses of crystal structures of phosphors. A significant improvement above 30% was observed in electroluminescence by the artificial defect on ZnS:Cu phosphors compared to non-treated phosphors. |
| Key words:
Phosphor, ACPEL, Phase transformation, Artificial defect, Ball-mill |
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