Temperature-dependent luminescence of CaFCl:Yb,Er upconverting nanocrystals
Temperature-dependent luminescence of CaFCl:Yb,Er upconverting nanocrystals
复制标题
CaFCl:Yb,Er 上转换纳米晶体的温度依赖性发光
DOI:
10.1016/j.jlumin.2021.117974
复制
发表时间:
2021
影响因子:
3.6
通讯作者:
Rabuffetti, Federico A.
中科院分区:
文献类型:
--
作者:
Dhanapala, B. Dulani;Munasinghe, Hashini N.;Rabuffetti, Federico A.
CaFCl:Yb,Er upconverting nanocrystals were synthesized via solution-phase thermolysis of metal trifluoroacetates and trichloroacetic acid and their temperature-dependent luminescence was probed in the 150–450 K range. Nanocrystals exhibited anisometric shape with average length and width equal to 90 and 76 nm, respectively, and an aspect ratio of 1.2. The solubility limits of ytterbium and erbium codoped in the CaFCl host were estimated to be ≈0.60 and 0.09 mol. %, respectively. Green emissions and luminescence decays from the2H11/2and4S3/2thermally coupled levels of Er3+were analyzed from the perspective of using CaFCl:Yb,Er for optical temperature sensing. When operating as a ratiometric thermometer, a maximum temperature sensitivity of 3.4 × 10−2K−1was obtained at 150 K. Much lower sensitivities were computed when nanocrystals were used as a lifetime thermometer, with a maximum of 2.0 × 10−3K−1at 275 K. Analysis of luminescence decays revealed the presence of a single type of Er3+activator. Radiative constants of the2H11/2and4S3/2levels and activation energy for thermal quenching of the latter were estimated.
登录
查看更多内容
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
D. Zevenhuijzen;Ja Vanwinsum;H. Hartog
通讯作者:
H. Hartog
影响因子:
3.6
作者:
S. Perera;K. Dissanayake;Federico A. Rabuffetti
通讯作者:
Federico A. Rabuffetti
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
M. Sieskind;J. Morel
通讯作者:
J. Morel
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
W. Schipper;G. Blasse
通讯作者:
G. Blasse
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
W. Ryba
通讯作者:
W. Ryba