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【答案】应助回帖
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alibabashiqun: 金币+280, 翻译EPI+1, ★★★★★最佳答案 2014-04-05 07:55:26
[ 感谢奖赏 ]
Recent popularity of white LEDs as a durable, pollution-free light source has led to copious research on ways of ramping up production Up to now, the main strategy for producing white LEDs has been to combine blue or Near–Ultra Violet LED chips with phosphors - either a yellow phosphor of Y3Al5O12 dubbed (YAG: Ce3+) or a multi-phase (Red-Green-Blue) phosphor (YAG: Ce3+) photoluminescence lacks red light and has a a low Color Rendering Index (CRI) RGB phosphors produce highly uniform white light but lack blue light and do not respond well to NUV exposure Instead of improving the status quo, this paper focuses on a best-of-both-worlds candidate - red-emitting phosphors activated by Eu3+ ions Phosphate hosts like Sr5(PO4)3Cl: Eu3+,11 K3Eu(PO4)2,12 Ca10Na(PO4)7: Eu3+, and red-emitting Ca2RF4PO4: Eu3+ (R = Gd, Y) all have high luminescence efficiency, and can all be made at low temperatures. Since the crystal structure of XXX was first reported [XX et al], a comprehensive survey of Eu3+ activated, red-emitting phosphor has not yet emerged - until now.
附注:
- "ramping up production" = 大量增产 // "red-emitting" = emitting red light
- "lack of broad and strong excitation bands in the NUV" = "not excitable by NUV"
或
"do not respond well to NUV exposure"
- 以下原文,适合做论文结论[我认为]不必在摘要中出现
essential activator for many different inorganic lattices to produce orange–red emission because of its 5Di→7Fj (i = 0–4; j = 0–2) transitions
employing NUV LED chips with tri–color phosphors have the advantage of less color point–shift against current as the white light is only phosphor converted rather than the case of combining blue LED chips with phosphors (e.g. YAG: Ce3+)
- "best-of-both-worlds" 表示具有
RGB phosphors 的 "superior color uniformity due to white color generated only by phoshors" 优点
并避免
(YAG: Ce3+) 的 " lack of red component" 缺点 |
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