完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.author | Huang, Chien-Hao | en_US |
dc.contributor.author | Wu, Pin-Jiun | en_US |
dc.contributor.author | Lee, Jyh-Fu | en_US |
dc.contributor.author | Chen, Teng-Ming | en_US |
dc.date.accessioned | 2019-04-02T05:59:00Z | - |
dc.date.available | 2019-04-02T05:59:00Z | - |
dc.date.issued | 2011-01-01 | en_US |
dc.identifier.issn | 0959-9428 | en_US |
dc.identifier.uri | http://dx.doi.org/10.1039/c1jm11018g | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/150344 | - |
dc.description.abstract | Two series of single-composition (Ca,Mg,Sr)(9)Y(PO4)(7):Eu2+ and (Ca0.5Sr0.5)(9)Y(PO4)(7):Eu2+,Mn2+ phosphors were synthesized via high-temperature solid-state reactions. Their emission colors could be tuned from blue to green and eventually to red through tuning the crystal field splitting and energy transfer. On examining the Mn2+ concentration-dependent photoluminescence properties, we found that co-doping with Mn2+ would lead to a change in Eu2+/Eu3+ ratio. Moreover, an energy transfer from Eu2+ to Mn2+ occurs because of the spectral overlap between the emission band of Eu2+ and the excitation band of Mn2+. The resonance-type energy transfer via a dipole-quadrupole interaction mechanism was supported by decay lifetime data and the critical distance of energy transfer was calculated to be 11.09 angstrom A. A trichromatic white-light emitting diode was fabricated by integrating a 380 nm near-ultraviolet (n-UV) chip comprising yellow-emitting (Ca0.5Sr0.5)(9)Y (PO4)(7):0.007Eu(2+),0.02Mn(2+) and blue-emitting (Ca0.5Mg0.5)(9)Y(PO4)(7):0.007Eu(2+) phosphors into a single package. Such a composite device emitted white light with a correlated color temperature of 6303 K, a color rendering index of 87.4, and color coordinates (0.314, 0.348) close to those of ideal white light. The results suggest that a phosphor blend of (Ca0.5Sr0.5)(9)Y(PO4)(7):0.007Eu(2+), 0.02Mn(2+) and (Ca0.5Mg0.5)(9)Y(PO4)(7):0.007Eu(2+) is potentially useful for white n-UV light-emitting diodes (LEDs). | en_US |
dc.language.iso | en_US | en_US |
dc.title | (Ca,Mg,Sr)(9)Y(PO4)(7):Eu2+,Mn2+: Phosphors for white-light near-UV LEDs through crystal field tuning and energy transfer | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1039/c1jm11018g | en_US |
dc.identifier.journal | JOURNAL OF MATERIALS CHEMISTRY | en_US |
dc.citation.volume | 21 | en_US |
dc.citation.spage | 10489 | en_US |
dc.citation.epage | 10495 | en_US |
dc.contributor.department | 應用化學系 | zh_TW |
dc.contributor.department | Department of Applied Chemistry | en_US |
dc.identifier.wosnumber | WOS:000292982800040 | en_US |
dc.citation.woscount | 146 | en_US |
顯示於類別: | 期刊論文 |