Engineering phosphors for improved brightness |
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| Authors: | C H Lin Bi-Shiou Chiou J D Lin |
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| Affiliation: | (1) Department of Electronics Engineering and Institute of Electronics, National Chiao Tung University, Hsinchu, Taiwan;(2) Electronic Research Service Organization, Industrial Technology Research Institute, Hsinchu, Taiwan |
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| Abstract: | Factors affecting the cathodoluminescent (CL) efficiency of phosphors include: morphology, size, stoichiometry, composition, and surface of the phosphors. In the design of phosphors for low-voltage operations, processes such as surface etching are used to enhance phosphor efficiency. In this study, zinc-activated ZnO phosphors were subjected to three processes: acid etching, ball milling, and/or ultrasonic vibration, and the effect of each process on the CL efficiency studied. It is found that the brightness of phosphors increases 40% after ultrasonic vibration followed by etching twice with 0.005 M HNO3. |
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