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639 results on '"Li, Guojian"'

20. MM-VTON: A Multi-stage Virtual Try-on Method Using Multiple Image Features

Author

Li, Guojian, Zhang, Haijun, Mu, Xiangyu, Ma, Jianghong, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Zhang, Haijun, editor, Ke, Yinggen, editor, Wu, Zhou, editor, Hao, Tianyong, editor, Zhang, Zhao, editor, Meng, Weizhi, editor, and Mu, Yuanyuan, editor

Published
2023
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41. Molten salt synthesized LaTa7O19:Er3+/Yb3+ with superior upconversion luminescence using KCl flux.

Author

Yan, Xianglan, Cao, Yongze, Wang, Xuekai, Zhang, Jinsu, Xu, Sai, Li, Guojian, and Chen, Baojiu

Abstract

A LaTa7O19(LTO):Er3+/Yb3+ upconversion luminescence (UCL) phosphor with a hexagonal structure was successfully prepared using a molten salt synthesis method using KCl as solvent. Increasing the holding temperature from 825 to 1150 °C, the LTO structure is transformed towards K2LaTa5O15(KLTO). At 1150 °C, the sample is pure phase KLTO:Er3+/Yb3+. Increasing the holding time at 825 °C from 2 to 48 h, the LTO phase first increases and then decreases. Increasing the KCl flux mass at 825 °C for 24 h, the KLTO structure is first transformed towards LTO, then the KLTO structure increases, and LTO:Er3+/Yb3+ grain size decreases. The highest green UCL integral intensity of LTO:Er3+/Yb3+ reached 89% of β-NaYF4:Er3+/Yb3+. The maximum relative temperature sensitivity of 0.866% K−1 is reached by using the luminescence intensity ratio (LIR) technique. LTO:Er3+/Yb3+ phosphors with excellent pure green UCL can be prepared by molten salt with KCl flux, which can be applied in display and temperature sensing. [ABSTRACT FROM AUTHOR]

Published
2024
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