Color Tuning of Direct White Light of Lanthanum Aluminate with Mixed-Valence Europium
The generation of direct white-light emission of the coexisting valence-varied europium−lanthanum aluminate through substitution of cations into the host and its resultant adjustment of the energy transfer have been presented. With respect to La0.99−x Sr x AlO3−δ:Eu0.01 and La0.994Al1−x O3−δ:Eu0.006...
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| Published in | Inorganic chemistry Vol. 49; no. 11; pp. 4922 - 4927 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Chemical Society
07.06.2010
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| Online Access | Get full text |
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| Summary: | The generation of direct white-light emission of the coexisting valence-varied europium−lanthanum aluminate through substitution of cations into the host and its resultant adjustment of the energy transfer have been presented. With respect to La0.99−x Sr x AlO3−δ:Eu0.01 and La0.994Al1−x O3−δ:Eu0.006, and Mn x , Li0.012, the green-light emission positioned at 515 nm plays a key role to color mix for white light and can be efficiently tuned by adjusting the transfer of energy and relevant transition emissions between the luminous centers of Eu2+ and Eu3+/Mn2+, via varying amounts of dopants. Direct white-light emission with optimized values of 86 for the color rendering index and 5091 K for the correlated color temperature has been achieved for lanthanum aluminate by this mixed-valence means. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0020-1669 1520-510X |
| DOI: | 10.1021/ic902538a |