Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes
A potential phosphor (Ca1-xBax)3(PO 4)2:Eu2+ was synthesized by a solid-state reaction. X-ray diffraction (XRD) analysis confirmed the formation of (Ca 1-xBax)3(PO4)2 crystal phase. With the Ba2+ content increasing, the bandgap of (Ca 1-xBax)3(PO4)2 increases from 5.5 to 5.9 eV, and the crystal fiel...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier
2013
|
| Online Access: | http://hdl.handle.net/20.500.11937/19078 |
| _version_ | 1848749930377641984 |
|---|---|
| author | Li, Y. Yu, H. Deng, D. Hua, Y. Zhao, S. Jia, Guohua Wang, H. Huang, L. Li, Y. Li, C. Xu, S. |
| author_facet | Li, Y. Yu, H. Deng, D. Hua, Y. Zhao, S. Jia, Guohua Wang, H. Huang, L. Li, Y. Li, C. Xu, S. |
| author_sort | Li, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A potential phosphor (Ca1-xBax)3(PO 4)2:Eu2+ was synthesized by a solid-state reaction. X-ray diffraction (XRD) analysis confirmed the formation of (Ca 1-xBax)3(PO4)2 crystal phase. With the Ba2+ content increasing, the bandgap of (Ca 1-xBax)3(PO4)2 increases from 5.5 to 5.9 eV, and the crystal field splitting between the two lowest Eu2+ 5d levels is enhanced from 6085 to 6808 cm-1 in (Ca1-xBax)3(PO4)2. As a result, the emission peak of (Ca1-xBax) 3(PO4)2: Eu2+ shifts from 447 to 550 nm, which means that the emission color alters from blue to yellow. The redshift of the emission band of (Ca1-xBax) 3(PO4)2:Eu2+ was explained based on crystal field strength, covalence, Stokes shift. The results revealed that partial substitution of Ca2+ by Ba2+ ions was therefore a much considerable way to shift the color point of LEDs. © 2013 Elsevier Inc. All rights reserved. |
| first_indexed | 2025-11-14T07:28:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-19078 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:28:46Z |
| publishDate | 2013 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-190782023-08-02T06:39:07Z Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes Li, Y. Yu, H. Deng, D. Hua, Y. Zhao, S. Jia, Guohua Wang, H. Huang, L. Li, Y. Li, C. Xu, S. A potential phosphor (Ca1-xBax)3(PO 4)2:Eu2+ was synthesized by a solid-state reaction. X-ray diffraction (XRD) analysis confirmed the formation of (Ca 1-xBax)3(PO4)2 crystal phase. With the Ba2+ content increasing, the bandgap of (Ca 1-xBax)3(PO4)2 increases from 5.5 to 5.9 eV, and the crystal field splitting between the two lowest Eu2+ 5d levels is enhanced from 6085 to 6808 cm-1 in (Ca1-xBax)3(PO4)2. As a result, the emission peak of (Ca1-xBax) 3(PO4)2: Eu2+ shifts from 447 to 550 nm, which means that the emission color alters from blue to yellow. The redshift of the emission band of (Ca1-xBax) 3(PO4)2:Eu2+ was explained based on crystal field strength, covalence, Stokes shift. The results revealed that partial substitution of Ca2+ by Ba2+ ions was therefore a much considerable way to shift the color point of LEDs. © 2013 Elsevier Inc. All rights reserved. 2013 Journal Article http://hdl.handle.net/20.500.11937/19078 10.1016/j.jssc.2012.12.012 Elsevier restricted |
| spellingShingle | Li, Y. Yu, H. Deng, D. Hua, Y. Zhao, S. Jia, Guohua Wang, H. Huang, L. Li, Y. Li, C. Xu, S. Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title | Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title_full | Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title_fullStr | Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title_full_unstemmed | Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title_short | Color Point Tuning by Partial Ba2+ Substitution of Ca 2+ in (Ca1-xBax)3(PO 4)2 Phosphor for White Light Emitting Diodes |
| title_sort | color point tuning by partial ba2+ substitution of ca 2+ in (ca1-xbax)3(po 4)2 phosphor for white light emitting diodes |
| url | http://hdl.handle.net/20.500.11937/19078 |