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Your search keyword '"Qiu, Xiaoyun"' showing total 12 results
Start Over Author "Qiu, Xiaoyun" Publisher elsevier bv
12 results on '"Qiu, Xiaoyun"'

3. Predicting Pharmacoresistance in Drug-Naïve Temporal Lobe Epilepsy Using Ictal EEGs

Author

Chen, Zhong, primary, Gong, Yiwei, additional, Xu, Cenglin, additional, Zhang, Zheng, additional, Zhang, Shuo, additional, Li, Xin, additional, Qiu, Xiaoyun, additional, Zheng, Yang, additional, Wang, Shuang, additional, Liu, Wenyu, additional, Fei, Fan, additional, Cheng, Heming, additional, Wang, Yi, additional, Zhou, Dong, additional, and Huang, Kejie, additional

Published
2023
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4. Subicular Seizure-Tagged C-Fos Neurons Alleviate Cognitive Deficit in Epilepsy

Author

Yang, Lin, primary, Zhang, Qi, additional, Wu, Xueqing, additional, Qiu, Xiaoyun, additional, Fei, Fan, additional, Lai, Nanxi, additional, Zheng, Yuyi, additional, Zhang, Qingyang, additional, Zhang, Mengdi, additional, Wang, Yu, additional, Wang, Fei, additional, Xu, Cenglin, additional, Ruan, Yeping, additional, Wang, Yi, additional, and Chen, Zhong, additional

Published
2022
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5. Luminescent properties of orange-red emitting phosphors NaGd(MoO4)(WO4):Sm3+ for white LED

Author

Fan Guodong, Hu Rongling, Qiu Xiaoyun, Di Fan, Zicun Tian, and Xuejuan Wang

Subjects
Photoluminescence, Materials science, Organic Chemistry, Doping, Analytical chemistry, Phosphor, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Fluorescence, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Tetragonal crystal system, Thermal stability, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Chromaticity, 0210 nano-technology, Luminescence, Spectroscopy
Abstract

A series of orange-red phosphors NaGd1-x(MoO4)(WO4):xSm3+ (x = 0.01, x = 0.02, x = 0.03, x = 0.04, x = 0.05 and x = 0.06) were prepared by a high temperature solid state reaction in air atmosphere. X-ray diffraction, photoluminescence (PL) spectra and fluorescent thermal stability analysis were utilized to characterize the structure and luminescence properties of as-prepared phosphors. The chromaticity coordinates of the samples were calculated and located in the orange-red region. These phosphors possessed scheelite tetragonal crystal structure with a space group of I41/a. Upon excitation at 406 nm, the emission peaks at 564 nm (4G5/2 → 6H5/2), 600 nm (4G5/2 → 6H7/2), 646 nm (4G5/2 → 6H9/2) and 700 nm (4G5/2 → 6H11/2) transitions of Sm3+ were observed. The optimum doping concentration of Sm3+ ions in NaGd1-x(MoO4)(WO4):xSm3+ was x = 0.03. The energy transfer mechanism between the Sm3+ ions was confirmed as dipole–dipole interaction and the critical distance was obtained to be 21.59 A. Compared with NaGd0.97(MoO4)2:0.03Sm3+, the fluorescence thermal quenching temperature of NaGd0.97(MoO4)(WO4):0.03Sm3+ increases from 398 K to 473 K, which preformed higher thermal stability and emitting-color stability, and shows a great potential for its application in LEDs as a suitable orange-red-emitting phosphor.

Published
2019

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