Upconversion luminescence and mechanisms of Nd3+/Ho3+/Yb3+ triply doped TeO2–K2O–Nb2O5 glasses
作者： Yuebo Hu , Jianbei Qiu
DOI: 10.1016/J.JLUMIN.2014.08.055
关键词: Upconversion luminescence 、 Emission quenching 、 Luminescence 、 Photon upconversion 、 Energy transfer 、 Doping 、 Optoelectronics 、 Analytical chemistry 、 Materials science 、 Excitation 、 Emission intensity
摘要: Abstract Nd 3+ /Ho /Yb triply doped TeO 2 –K O–Nb O 5 glasses were synthesized by the conventional melting-quenching technique. Single green upconversion (UC) luminescence centered at 532 nm, corresponding to ( F 4 , S )→ I 8 transitions of Ho was observed under 800 nm excitation. However, and red emission bands 547, 662 758 nm, → 7 respectively, simultaneously 980 nm The dependence UC intensity 800 excitations on Yb concentration studied. It found, excitation, 532 nm begin reduce when is higher than 0.8 mol%. same quenching not mechanisms two pumping sources discussed in terms experiment results. found that mainly depends ET excitation; however it ESA.
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