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Energy transfer between doubly doped Er3+, Tm3+ and Ho3+ rare earth ions in SiO2 nanoparticles
| Content Provider | Semantic Scholar |
|---|---|
| Author | Dhlamini, Mokhotjwa Simon Mhlongo, Gugu H. Swart, Hendrik C. Hillie, K. T. |
| Copyright Year | 2011 |
| Abstract | Abstract Preparation of Er 3+ , Ho 3+ and Tm 3+ ions co-doped SiO 2 nanoparticle phosphor powders by sol gel method is reported. The morphology and the particle size of the SiO 2 host matrix were confirmed by field emission scanning electron microscopy (FESEM). Ultraviolet, visible (UV/VIS) and cathodoluminescence measurements were carried out in order to investigate the optical properties of our powder phosphors. Green emissions at 520 nm from Er 3+ and 544 nm from Ho 3+ , and red emissions at 665 nm from both Er 3+ and Ho 3+ ions are reported. Another emission peak in the near infra-red (NIR) region at 875 nm from Er 3+ was also measured. Blue emission at 460 nm, red at 705 nm and a NIR peak in the region of 865 nm from Tm 3+ were observed. Red, green and blue (RGB) colours were measured from both SiO 2 :Er 3+ ,Tm 3+ and SiO 2 :Ho 3+ ,Tm 3+ systems. The change in the intensities of the emission peaks in both the SiO 2 :Ho 3+ ,Tm 3+ and SiO 2 :Er 3+ ,Tm 3+ systems with the change in accelerating beam voltage is shown. Energy transfer from Tm 3+ ions to Er 3+ and Ho 3+ ions was observed. A mechanism explaining the increase and decrease behaviour of the emission with accelerating beam voltage from both systems is reported. |
| Starting Page | 790 |
| Ending Page | 794 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jlumin.2010.12.005 |
| Alternate Webpage(s) | http://researchspace.csir.co.za/dspace/bitstream/handle/10204/5623/Dhlamini_2011_ABSTRACT%20ONLY.pdf?isAllowed=y&sequence=1 |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jlumin.2010.12.005 |
| Volume Number | 131 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
