ZnO and rare earth nanoparticles embedded in SiO2 matrix (ZnO-nc: Eu3+SiO2)
This report covers the study of the development of Zinc Oxide nanocrystals (ZnOnc) doped with Europium (III) Nitrate embedded in SiO2 matrix. The thin films have been developed using sol-gel methods based on previous studies. The objectives are to verify the formation of ZnO-nc and thereafter, optim...
Saved in:
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Final Year Project |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/61218 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This report covers the study of the development of Zinc Oxide nanocrystals (ZnOnc) doped with Europium (III) Nitrate embedded in SiO2 matrix. The thin films have been developed using sol-gel methods based on previous studies. The objectives are to verify the formation of ZnO-nc and thereafter, optimize the energy transfer process of excited ZnO-nc emission to overlap with the absorption band of Eu3+. Emission intensity from ZnO-nc are recorded using photoluminescence (PL). The optimization process of developing Eu3+ doped ZnO-nc is carried out through varying of time given for gelation during sol-gel process, dopant composition in the matrix, as well as annealing environment. It is conclusive that the optimum dopant concentration of Eu3+ was also found to be between 10-15%. Optimal annealing environment is set to be at 450oC, accompanied with a combination of Rapid Thermal Processing and post-annealing procedures. The following findings are in light of increased interest pertaining to ZnO-nc and its applications the optoelectronic industry which comprises of light emitting displays as well as UV photodetectors. |
|---|