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Long lasting blue phosphorescence and photostimulated luminescence in 12CaO⋅7Al2O3:Eu thin films grown by pulsed laser deposition
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhu, Hancheng Liu, Yuxue Yan, Duanting Bian, Hongyu Li, Shengnan Liu, Chunguang Xu, Changshan Wang, Xiaojun |
| Copyright Year | 2014 |
| Abstract | Abstract Long lasting blue emitting Eu-doped 12CaO⋅7Al 2 O 3 thin films have been prepared on quartz substrates by pulsed laser deposition combined with post-annealing. The 12CaO⋅7Al 2 O 3 phase is formed after annealing the films above 900 °C in vacuum ambient. Upon 323 nm excitation, the thin films exhibit a blue long lasting emission peaked at 444 nm, assigned to the 5 d –4 f transitions of Eu 2+ . The films annealed at 950 °C have stronger luminescence and longer lasting time than that annealed at 900 °C. The phosphorescence intensity of vacuum annealed film is better than that annealed in H 2 /N 2 atmosphere, which might be due to the increase of shallow trap numbers during the vacuum annealing process. Thermoluminescence curves demonstrate that vacuum and H 2 /N 2 atmosphere annealing could introduce a large number of both shallow and deep traps into 12CaO⋅7Al 2 O 3 :Eu thin films. After UV irradiation, excellent photostimulated luminescence can be observed under 980 nm excitation. Our results suggest that 12CaO⋅7Al 2 O 3 :Eu phosphor may serve as a promising blue luminescent materials used in fabrication of optical storage and illumination in dark environments. |
| Starting Page | 1771 |
| Ending Page | 1775 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.optmat.2014.04.023 |
| Volume Number | 36 |
| Alternate Webpage(s) | https://04bc9bd1-a-c89f64e1-s-sites.googlegroups.com/a/georgiasouthern.edu/xwang/home/publications/183_Opt%20Mater%202014%20HC%20Zhu.pdf?attachauth=ANoY7coVbOYHhSmVYlgEnzNsugeXNfESR3Kop-V7QZzbqBMSUnAKSKpz0RZ8uc-u_N3af7miQV80mOTO9L7E2VDK3knyJM7s6qPH_9PX3hkHlaJOUW9XDfTOL3PY_iBrHlZV8F-zGwXOe6l8N1IDyRVaOrCjZN-jYfGruHps1uzCdqu0RdcOdGCCwAXslVCPtVKFrd0VQ3egHEWd0NlL79wgfayBCk_TgPK6QpYity9_eblSaqMnfuNo5VnCams6clo8V8tj4Abk&attredirects=0&d=1 |
| Alternate Webpage(s) | https://doi.org/10.1016/j.optmat.2014.04.023 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
