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High upconversion quantum yield at low pump threshold in Er 3 þ / Yb 3 þ doped La 2 O 2 S phosphor
| Content Provider | Semantic Scholar |
|---|---|
| Author | Pokhrel, Madhab Gangadharan, Ajith Kumar Sardar, Dhiraj K. |
| Copyright Year | 2013 |
| Abstract | In this letter, we report the absolute upconversion quantum yields (QY) for 9% Yb3þ and 1% Er3þ codoped La2O2S and its comparison with NaYF4 doped with 20% Yb 3þ , 2% Er3þ for all the upconversion emissions centered at 410, 550, 667, and 822 nm at various excitation power densities at 977 nm excitation. The maximum upconversion QY for 9% Yb3þ and 1% Er3þ co-doped La2O2S was measured to be 5.8370.87% at the excitation power density of 13 W/cm. An excitation power dependent study revealed that although absolute upconversion QY measured for NaYF4: 20% Yb, 2% Er is higher at higher excitation power densities, La2O2S: 9% Yb, 1% Er possesses higher QYs at the lower excitation power densities. & 2013 Elsevier B.V. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://physics.utsa.edu/laserlab/publications/papers/2012/high%20upconversion%20quantum%20yield.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
