Ran Weiguang, Noh Hyeon Mi, Park Sung Heum, Choi Byung Chun, Kim Jung Hwan, Jeong Jung Hyun, Shi Jinsheng
Department of Physics, Pukyong National University, Busan 608-737, South Korea.
Department of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao 266109, People's Republic of China.
Dalton Trans. 2019 Aug 14;48(30):11382-11390. doi: 10.1039/c9dt01970g. Epub 2019 Jul 8.
The Er/Yb-codoped NaLaMgWO phosphors were synthesized via a traditional high-temperature solid-state reaction method. The temperature sensing performance was thoroughly investigated by studying the temperature-dependent up-conversion (UC) emission intensity ratio in the range of 293-533 K. A remarkable enhancement of green UC emission, as well as enhanced temperature sensitivity, were observed by increasing the Yb concentration. The maximum absolute sensor sensitivity was 2.29% K at 533 K. When the pump power of the 980 nm laser increased from 200 to 1000 mW, a slightly elevated temperature from 293-307 K was achieved in the compounds. Using the prepared phosphors and a 940 nm NIR chip, a green-emitting LED device was developed to confirm the applicability of our prepared phosphors for solid-state lighting. As a temperature probe, the prepared phosphor detected that the temperature increased from 286 K to 315 K when the drive current was increased from 90 mA to 300 mA. These results suggest that the Er/Yb-codoped NaLaMgWO phosphors have a potential application in solid-state lighting and optical thermometry.
通过传统高温固态反应法合成了铒/镱共掺杂的NaLaMgWO荧光粉。通过研究293 - 533 K范围内与温度相关的上转换（UC）发射强度比，对其温度传感性能进行了全面研究。通过增加镱浓度，观察到绿色UC发射显著增强以及温度灵敏度提高。在533 K时，最大绝对传感器灵敏度为2.29% K。当980 nm激光的泵浦功率从200 mW增加到1000 mW时，化合物中的温度从293 K略微升高到307 K。使用制备的荧光粉和940 nm近红外芯片，开发了一种绿色发光二极管器件，以确认我们制备的荧光粉在固态照明中的适用性。作为温度探头，当驱动电流从90 mA增加到300 mA时，制备的荧光粉检测到温度从286 K升高到315 K。这些结果表明，铒/镱共掺杂的NaLaMgWO荧光粉在固态照明和光学测温方面具有潜在应用。
