Abstract
Phosphors with tuning capabilities in their excitation and emission spectra are in high demand in the field of advanced optical technology. In this article, Eu2+ doped Ba9Lu2Si6O24 (BLSO: Eu2+) phosphors, which emit an intense light hat can be tuned from dark blue (463 nm) to efficient green (514 nm), were produced, simply by increasing the Eu2+ concentration in the BLSO host lattice. This tuning capability suggests that there are multiple and distinguishable crystallographic sites in the host lattice of the BLSO phosphors. The Eu2+ activators exhibit preferable site distributions in the BLSO host lattice, depending on the Eu2+ concentration. This offers the possibility for engineering the appropriate site surroundings, available for the Eu2+ activators. The Ba8.4Eu0.6Lu2Si6O24 phosphor displays a prominent yellowish-green emission under blue light (440 nm) excitation, compared to the dark blue emission of BLSO: 0.1Eu2+ phosphors. The green emission from the BLSO: xEu2+ phosphor is closely associated with the specific coordinating environment of the Eu2+ activator in various crystallographic Ba sites. However, concentration quenching phenomena results in intensity decrease, a problem which is then solved by introducing Sr2+.
| Original language | English |
|---|---|
| Pages (from-to) | 374-381 |
| Number of pages | 8 |
| Journal | Journal of Alloys and Compounds |
| Volume | 767 |
| DOIs | |
| Publication status | Published - 30 Oct 2018 |
| Externally published | Yes |
Keywords
- Cation substitution
- Crystal site engineering
- Phosphor host
- Photoluminescence
Cite this
}
Crystal-site engineering for developing tunable green light emitting Ba9Lu2Si6O24:Eu2+ phosphors for efficient white LEDs. / Khan, Sayed Ali; Hao, Zhong; Ji, Wei Wei; Khan, Noor Zamin; Abadikhah, Hamidreza; Hao, Luyuan; Xu, Xin; Agathopoulos, Simeon; Bao, Qiaoliang.
In: Journal of Alloys and Compounds, Vol. 767, 30.10.2018, p. 374-381.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Crystal-site engineering for developing tunable green light emitting Ba9Lu2Si6O24:Eu2+ phosphors for efficient white LEDs
AU - Khan, Sayed Ali
AU - Hao, Zhong
AU - Ji, Wei Wei
AU - Khan, Noor Zamin
AU - Abadikhah, Hamidreza
AU - Hao, Luyuan
AU - Xu, Xin
AU - Agathopoulos, Simeon
AU - Bao, Qiaoliang
PY - 2018/10/30
Y1 - 2018/10/30
N2 - Phosphors with tuning capabilities in their excitation and emission spectra are in high demand in the field of advanced optical technology. In this article, Eu2+ doped Ba9Lu2Si6O24 (BLSO: Eu2+) phosphors, which emit an intense light hat can be tuned from dark blue (463 nm) to efficient green (514 nm), were produced, simply by increasing the Eu2+ concentration in the BLSO host lattice. This tuning capability suggests that there are multiple and distinguishable crystallographic sites in the host lattice of the BLSO phosphors. The Eu2+ activators exhibit preferable site distributions in the BLSO host lattice, depending on the Eu2+ concentration. This offers the possibility for engineering the appropriate site surroundings, available for the Eu2+ activators. The Ba8.4Eu0.6Lu2Si6O24 phosphor displays a prominent yellowish-green emission under blue light (440 nm) excitation, compared to the dark blue emission of BLSO: 0.1Eu2+ phosphors. The green emission from the BLSO: xEu2+ phosphor is closely associated with the specific coordinating environment of the Eu2+ activator in various crystallographic Ba sites. However, concentration quenching phenomena results in intensity decrease, a problem which is then solved by introducing Sr2+.
AB - Phosphors with tuning capabilities in their excitation and emission spectra are in high demand in the field of advanced optical technology. In this article, Eu2+ doped Ba9Lu2Si6O24 (BLSO: Eu2+) phosphors, which emit an intense light hat can be tuned from dark blue (463 nm) to efficient green (514 nm), were produced, simply by increasing the Eu2+ concentration in the BLSO host lattice. This tuning capability suggests that there are multiple and distinguishable crystallographic sites in the host lattice of the BLSO phosphors. The Eu2+ activators exhibit preferable site distributions in the BLSO host lattice, depending on the Eu2+ concentration. This offers the possibility for engineering the appropriate site surroundings, available for the Eu2+ activators. The Ba8.4Eu0.6Lu2Si6O24 phosphor displays a prominent yellowish-green emission under blue light (440 nm) excitation, compared to the dark blue emission of BLSO: 0.1Eu2+ phosphors. The green emission from the BLSO: xEu2+ phosphor is closely associated with the specific coordinating environment of the Eu2+ activator in various crystallographic Ba sites. However, concentration quenching phenomena results in intensity decrease, a problem which is then solved by introducing Sr2+.
KW - Cation substitution
KW - Crystal site engineering
KW - Phosphor host
KW - Photoluminescence
UR - http://www.scopus.com/inward/record.url?scp=85049874047&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2018.07.107
DO - 10.1016/j.jallcom.2018.07.107
M3 - Article
VL - 767
SP - 374
EP - 381
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -