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Spectroscopic Properties and Upconversion Studies in Ho 3+ /Yb 3+ Co‐doped Calcium Scandate with Spectrally Pure Green emission
Author(s) -
Li Jing,
Zhang Jiahua,
Hao Zhendong,
Zhang Xia,
Zhao Jihong,
Luo Yongshi
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201300842
Subject(s) - photon upconversion , doping , analytical chemistry (journal) , materials science , luminescence , emission spectrum , oxide , quenching (fluorescence) , spectral line , fluorescence , chemistry , optics , optoelectronics , physics , chromatography , astronomy , metallurgy
Abstract The optical properties of a Ho 3+ /Yb 3+ co‐doped CaSc 2 O 4 oxide material are investigated in detail. The spectral properties are described as a function of doping concentrations. The efficient Yb 3+ →Ho 3+ energy transfer is observed. The transfer efficiency approaches 50 % before concentration quenching. The concentration‐optimized sample exhibits a strong green emission accompanied with a weak red emission, showing perfect green monochromaticity. The results of the spectral distribution, power dependence, and lifetime measurements are presented. The green, red, and near‐infrared (NIR) emissions around 545, 660, and 759 nm are assigned to the 5 F 4 + 5 S 2 → 5 I 8 , 5 F 5 → 5 I 8 , and 5 F 4 + 5 S 2 → 5 I 7 transitions of Ho 3+ , respectively. The detailed study reveals the upconversion luminescence mechanism involved in a novel Ho 3+ /Yb 3+ co‐doped CaSc 2 O 4 oxide material.