|
|||||
|
|
Citric based sol-gel synthesis and luminescence characteristics of CaLa2ZnO5:Euphosphors for blue LED excited white LEDs |
|
| Authors: | Vengala Rao BandiBhaskar Kumar Grandhe Kiwan Jang Ho-Sueb LeeDong-Soo Shin Soung-Soo YiJung-Hyun Jeong |
| Affiliation: | a Department of Physics, Changwon National University, Changwon 641-773, Republic of Korea b Department of Chemistry, Changwon National University, Changwon, Republic of Korea c Department of Photonics, Silla University, Busan, Republic of Korea d Department of Physics, Pukyong National University, Busan, Republic of Korea |
| Abstract: | 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. |
| Keywords: | Oxide materials Sol-gel processes Optical properties |
| 本文献已被 ScienceDirect 等数据库收录！ | |