| Autor: |
Ho-Sueb Lee, Kiwan Jang, Jung Hyun Jeong, Bhaskar Kumar Grandhe, Soung Soo Yi, Vengala Rao Bandi, Dong-Soo Shin |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Journal of Alloys and Compounds. 512:264-269 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2011.09.078 |
| Popis: |
A novel class of orange–red phosphors namely CaLa2ZnO5 (CLZ) doped with Eu3+ ions were prepared by adopting citrate based sol–gel method. Those were thoroughly characterized by means of XRD, SEM, Tg-DTA, photoluminescent (PL) spectral profiles. PL studies reveal that its emission intensity strongly depends on sintering temperature as well as the dopant ion (Eu3+) concentration. Eu3+ ion doped CaLa2ZnO5 phosphor has a strong excitation at 468 nm, which correspond to the popular emission line from a GaN based blue light-emitting diode (LED) chip. The influence of the preparation method on the luminescence property was studied by comparing the emission performance of phosphors prepared by sol–gel and solid-state reaction methods along with a commercial red phosphor Y2O2S:Eu3+. Thus, the intense red emission (5D0 → 7F2) of the Eu3+ doped CLZ phosphors under blue excitation suggests them to be a potential candidate for the production of white light by blue LEDs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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