| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1495154 | Optical Materials | 2013 | 4 Pages |
The blue band optical absorption and green luminescence of ZnO phosphors doping with aluminum are systematic studied. The Al content is varied from 0.01 at.% to 1 at.%. SEM images illustrated that Al doping can effectively suppress the ZnO grain growth. XRD results clearly manifest that the Al solubility limit in ZnO is around 0.1 at.%. It is also found that the E1 (LO) vibration mode in the Raman spectra exhibits a good correlation with the blue band optical absorption and green photoluminescence. The results revealed that both VO0 and VO+ can give rise to the E1 (LO) vibration mode. We conclude that the VO and Oi defects are the dominant reason of the green photoluminescence in ZnO phosphors, in oxygen-deficient and oxygen-rich conditions, respectively.
► E1 (LO) mode has a good relation with the 410 nm absorption and green emission. ► Results indicated that both VO0 and VO+ give rise to the E1 (LO) vibration mode. ► VO and Oi defects contribute to the green photoluminescence in ZnO. ► Each will be dominated in O-deficient and O-rich conditions, respectively.
