Инд. авторы:	Uralbekov B., Shevchenko V., Kuznetsov A., Kokh A., Kononova N.G., Bolatov A., Kokh K.
Заглавие:	Novel compounds in the MMeR(BO3)(2) borate family (M = alkali metal, Me = alkaline earth metal, R = rare-earth element): Syntheses, crystal structures and luminescent properties
Библ. ссылка:	Uralbekov B., Shevchenko V., Kuznetsov A., Kokh A., Kononova N.G., Bolatov A., Kokh K. Novel compounds in the MMeR(BO3)(2) borate family (M = alkali metal, Me = alkaline earth metal, R = rare-earth element): Syntheses, crystal structures and luminescent properties // Journal of Luminescence. - 2019. - Vol.216. - Art.116712. - ISSN 0022-2313. - EISSN 1872-7883.
Идентиф-ры:	DOI: 10.1016/j.jlumin.2019.116712; WoS: 000493395400014;
Реферат:	eng: This review focuses on the recently discovered new compounds in the MMeR(BO3)(2) borate family (where M = alkali metal, Me = alkaline earth metal, and R = rare-earth element), describing their crystal structures and luminescent properties. The basic building block for this structure is the two-layer {R[A(BO3)(2)](2)} package (where A is an alkali metal and/or alkali earth metal). The features of the A-cation distribution in the structure determine the unit-cell lattice parameters and symmetry of the compounds. Some borates have not been synthesized because the structure is no longer maintained for relatively large R cation sizes (La, Ce for KBaY(BO3)(2) borate family). Many new rare-earth doped borates with down-conversion luminescent properties have been discovered and various colour-tunable phosphor materials were developed by changing the doping concentration and by controlling the fraction of the rare earth ions. A review of the literature clearly shows that the mechanism of the energy transfer between the active ions in the co-doped borates is preferably via electric multipolar interaction, while the exchange interaction is negligible. Emission intensity of Tb3+, Eu3+, and Mn2+-doped MMeR(BO3)(2) borates can be effectively sensitized by Ce-3(+) co-doping, making these borate materials promising colour-tunable light emitting phosphor materials for pc-wLED application.
Ключевые слова:	KSrR(BO3)(2); Crystal structure; Phosphors; Luminescent properties; Down-conversion; PHOTOLUMINESCENCE PROPERTIES; ENERGY-TRANSFER; ULTRAVIOLET; PHOSPHOR; GROWTH; YB; ND; IONS; EU3+; KBaR(BO3)(2); CE3+; NaBaR(BO3)(2);
Издано:	2019
Физ. хар-ка:	116712