TY - JOUR

T1 - Examining the contribution of Cu and Sr codoping on luminescence properties of borate crystals

AU - Bekker, Tatyana B.

AU - Davydov, Alexey V.

AU - Ryadun, Alexey A.

AU - Yelisseyev, Alexander P.

AU - Solntsev, Vladimir P.

AU - Fedorenko, Anastasiya D.

PY - 2025/1

Y1 - 2025/1

N2 - Four crystals of Ba12(BO3)6[BO3][LiF4] (LBBF) with different ratios of co-dopants, Cu and Sr, were grown from high-temperature solutions. The LBBF structure is built from a porous [Ba12(BO3)6]6+ framework with channels along the optical axis filled with anionic groups. It was found that LBBF:Cu,Sr accommodates copper ions in the channels of the structure in both mono- and divalent states with the concentration of Cu + exceeding that of Cu2+, and Sr2+ replaces Ba2+ in the framework. At a constant concentration of copper and an increase in the concentration of strontium in the initial solution, the concentration of Cu+ in LBBF does not change monotonically but has a maximum. The broad photoluminescence band at about 410–440 nm is associated with the emission of Cu+ ions, while the bands at about 310–317 nm and 600 nm are related to Cu2+. All emissions demonstrate considerable temperature quenching in the range from 77 to 300 K. The LBBF:Cu crystals exhibit intense thermoluminescence (TL) in the range from 100 to 250 K after low-temperature X-ray irradiation, and peaks at about 315 and 380 K after room-temperature irradiation. With combined doping with strontium, the TL peaks shift to the region of higher temperatures, 365 and 410 K, without weakening the high-temperature component, which intensity linearly depends on radiation dose.

AB - Four crystals of Ba12(BO3)6[BO3][LiF4] (LBBF) with different ratios of co-dopants, Cu and Sr, were grown from high-temperature solutions. The LBBF structure is built from a porous [Ba12(BO3)6]6+ framework with channels along the optical axis filled with anionic groups. It was found that LBBF:Cu,Sr accommodates copper ions in the channels of the structure in both mono- and divalent states with the concentration of Cu + exceeding that of Cu2+, and Sr2+ replaces Ba2+ in the framework. At a constant concentration of copper and an increase in the concentration of strontium in the initial solution, the concentration of Cu+ in LBBF does not change monotonically but has a maximum. The broad photoluminescence band at about 410–440 nm is associated with the emission of Cu+ ions, while the bands at about 310–317 nm and 600 nm are related to Cu2+. All emissions demonstrate considerable temperature quenching in the range from 77 to 300 K. The LBBF:Cu crystals exhibit intense thermoluminescence (TL) in the range from 100 to 250 K after low-temperature X-ray irradiation, and peaks at about 315 and 380 K after room-temperature irradiation. With combined doping with strontium, the TL peaks shift to the region of higher temperatures, 365 and 410 K, without weakening the high-temperature component, which intensity linearly depends on radiation dose.

KW - Borates

KW - Mono- and divalent copper

KW - Photo- and termoluminescence

KW - X-ray photoelectron and electronic paramagnetic resonance spectroscopy

UR - https://www.mendeley.com/catalogue/bb01e5fc-0756-392b-b669-4e90fb5b3f7c/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85209949313&origin=inward&txGid=1ab51490d0ade58af033e06c56d64729

U2 - 10.1016/j.optmat.2024.116465

DO - 10.1016/j.optmat.2024.116465

M3 - статья

VL - 158

JO - Optical Materials

JF - Optical Materials

SN - 0925-3467

M1 - 116465

ER -