Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 30, Pages 7756-7759Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201402520
Keywords
crystal-site engineering; lanthanides; luminescence; phosphors; silicates
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (Japan) (MEXT) [2206]
- Grants-in-Aid for Scientific Research [22107002] Funding Source: KAKEN
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We report a new dicalcium silicate phosphor, Ca2-xEuxSiO4, which emits red light in response to blue-light excitation. When excited at 450 nm, deep-red emission at 650 nm was clearly observed in Ca1.2Eu0.8SiO4, the external and internal quantum efficiencies of which were 44% and 50%, respectively. The red emission from Ca2-xEuxSiO4 was strongly related to the peculiar coordination environments of Eu2+ in two types of Ca sites. The red-emitting Ca2SiO4:Eu2+ phosphors are promising materials for next-generation, white-light-emitting diode applications.
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