TY  - JOUR
AU  - Li, Xiaohui
AU  - Zhou, Lei
AU  - Hong, Junyu
AU  - He, Shiman
AU  - Jing, Xiping
AU  - Dramićanin, Miroslav
AU  - Shi, Jianxin
AU  - Wu, Mingmei
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9016
AB  - Modulation of structural order-disorder transition and structural oxygen defects can provide fundamental insights in the optimization of luminescence performances of phosphors. In this study, the luminescence of Ba3ZnTa2O9(BZT) was systematically elucidated, including the emission arising from the charge transfer (Nb5+/Ta5+ O2-) and anti-site oxygen defect emission due to the B-site disordering (defect type: [2ZnNb3-+ 3Vo2+]), as corroborated by the electronic structural calculations and detailed experiments. We present a two-step design for the optimization of luminescence properties of Ba3ZnTa2O9phosphor. In the first step, the B-site equivalent doping (Ta5+substituted by Nb5+) was used to modulate the B-site atomic arrangement, which induced the formation of the cubic phase with B-site full disordering. In the second step, the A-site nonequivalent doping (Ba2+substituted by Eu3+) was used to decrease the oxygen defect concentration. After the two-step optimization, the photoluminescence excitation spectrum of Ba3-yEuyZnNb2O9(y= 0.1) shows a broad band excitation (300-400 nm), which is a good match with the near-UV LED chip emission. Even more importantly, the emission spectrum covers the entire visible spectral region and exhibits a remarkably enhanced emission intensity (a 40 times enhancement when compared to that of the intrinsic BZT). The fabricated LED device comprising an n-UV chip (= 370 nm) and a single-component Ba3-yEuyZnNb2O9(y= 0.1) phosphor coating emits a warm white light with a low correlated color temperature (CCT = 4813 K) and a good color rendering index (Ra= 82.36).
T2  - Journal of Materials Chemistry C
T1  - Structural modulation induced intensity enhancement of full color spectra: A case of Ba3ZnTa2-xNbxO9:Eu3+phosphors
VL  - 8
IS  - 20
SP  - 6715
EP  - 6723
DO  - 10.1039/D0TC01201G
ER  - 

@article{
author = "Li, Xiaohui and Zhou, Lei and Hong, Junyu and He, Shiman and Jing, Xiping and Dramićanin, Miroslav and Shi, Jianxin and Wu, Mingmei",
year = "2020",
abstract = "Modulation of structural order-disorder transition and structural oxygen defects can provide fundamental insights in the optimization of luminescence performances of phosphors. In this study, the luminescence of Ba3ZnTa2O9(BZT) was systematically elucidated, including the emission arising from the charge transfer (Nb5+/Ta5+ O2-) and anti-site oxygen defect emission due to the B-site disordering (defect type: [2ZnNb3-+ 3Vo2+]), as corroborated by the electronic structural calculations and detailed experiments. We present a two-step design for the optimization of luminescence properties of Ba3ZnTa2O9phosphor. In the first step, the B-site equivalent doping (Ta5+substituted by Nb5+) was used to modulate the B-site atomic arrangement, which induced the formation of the cubic phase with B-site full disordering. In the second step, the A-site nonequivalent doping (Ba2+substituted by Eu3+) was used to decrease the oxygen defect concentration. After the two-step optimization, the photoluminescence excitation spectrum of Ba3-yEuyZnNb2O9(y= 0.1) shows a broad band excitation (300-400 nm), which is a good match with the near-UV LED chip emission. Even more importantly, the emission spectrum covers the entire visible spectral region and exhibits a remarkably enhanced emission intensity (a 40 times enhancement when compared to that of the intrinsic BZT). The fabricated LED device comprising an n-UV chip (= 370 nm) and a single-component Ba3-yEuyZnNb2O9(y= 0.1) phosphor coating emits a warm white light with a low correlated color temperature (CCT = 4813 K) and a good color rendering index (Ra= 82.36).",
journal = "Journal of Materials Chemistry C",
title = "Structural modulation induced intensity enhancement of full color spectra: A case of Ba3ZnTa2-xNbxO9:Eu3+phosphors",
volume = "8",
number = "20",
pages = "6715-6723",
doi = "10.1039/D0TC01201G"
}

Li, X., Zhou, L., Hong, J., He, S., Jing, X., Dramićanin, M., Shi, J.,& Wu, M.. (2020). Structural modulation induced intensity enhancement of full color spectra: A case of Ba3ZnTa2-xNbxO9:Eu3+phosphors. in Journal of Materials Chemistry C, 8(20), 6715-6723.
https://doi.org/10.1039/D0TC01201G

Li X, Zhou L, Hong J, He S, Jing X, Dramićanin M, Shi J, Wu M. Structural modulation induced intensity enhancement of full color spectra: A case of Ba3ZnTa2-xNbxO9:Eu3+phosphors. in Journal of Materials Chemistry C. 2020;8(20):6715-6723.
doi:10.1039/D0TC01201G .

Li, Xiaohui, Zhou, Lei, Hong, Junyu, He, Shiman, Jing, Xiping, Dramićanin, Miroslav, Shi, Jianxin, Wu, Mingmei, "Structural modulation induced intensity enhancement of full color spectra: A case of Ba3ZnTa2-xNbxO9:Eu3+phosphors" in Journal of Materials Chemistry C, 8, no. 20 (2020):6715-6723,
https://doi.org/10.1039/D0TC01201G . .