Patra, Amitava ; Friend, Christopher S. ; Kapoor, Rakesh ; Prasad, Paras N. (2003) Effect of crystal nature on upconversion luminescence in Er3+:ZrO2 nanocrystals Applied Physics Letters, 83 (2). pp. 284-286. ISSN 0003-6951
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Official URL: http://aip.scitation.org/doi/10.1063/1.1592891
Related URL: http://dx.doi.org/10.1063/1.1592891
Abstract
The effects of crystal size and crystal phase on the upconverted emission of Er3+ in ZrO2 oxide nanocrystals are reported. Green (550 nm) and red (670 nm) upconversion emission were observed at room temperature from the 4S3/2 and 4F9/2 levels of Er3+:ZrO2 nanocrystals. It is found that at 850 mW of cw excitation power, the total luminescence was 11960 Cd/m2 for 1000 °C heated sample. We observed that the overall upconversion luminescence intensity depends on crystal structure and particle size. We have also confirmed that upconversion process in all these samples results from a two-photon excited-state absorption process.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to AIP Publishing. |
| ID Code: | 104862 |
| Deposited On: | 01 Dec 2017 11:03 |
| Last Modified: | 01 Dec 2017 11:03 |
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