Creation of an oxygen-enriched environment during synthesis as an effective way to improve luminescent properties of Y_(2)O_(3):Eu^(3+)  

作　　者：Aleksandr A.Nashivochnikov Anton I.Kostyukov Mariana I.Rakhmanova Lidiya S.Kibis Svetlana V.Cherepanova Evgenii A.Suprun 

机构地区：[1]Novosibirsk State University,Pirogova Str.2,630090,Novosibirsk,Russia [2]Boreskov Institute of Catalysis SB RAS,5 Lavrentiev Ave,630090,Novosibirsk,Russia [3]Nikolaev Institute of Inorganic Chemistry SB RAS,3 Lavrentiev Ave,630090,Novosibirsk,Russia

出　　处：《Journal of Rare Earths》2025年第1期21-29,I0001,共10页稀土学报(英文版)

基　　金：Project supported by Russian Science Foundation(22-73-00106);partly by NIIC project(121031700313-8,M.Rakhmanova,PL kinetics study)。

摘　　要：The growing demand for luminescent nanomaterials intended for various applications increases the necessity to develop and improve approaches to the creation of highly efficient nanosized phosphors.In current study,an approach to enhancing the efficiency of red luminescence of monoclinic Y_(2)O_(3):Eu^(3+)with the particle size of~20 nm by creating the oxygen-enriched environment during the gas-phase synthesis was developed.To investigate the effect of oxygen amount during the synthesis on characteristics of the phosphor,a series of nano structured Y_(2)O_(3):Eu^(3+)with the addition of 0-40 vol%O_(2) to the main buffer gas Ar was synthesized by laser vaporization.It is shown that the amount of added O_(2) exerts virtually no effect on the phase composition and particle size,but significantly improves the luminescent characteristics of Y_(2)O_(3):Eu^(3+).Thus,the addition of 30 vol%O_(2) leads to virtually a 20-fold growth in the photoluminescence(PL)intensity caused by ^(5)D_(0)→^(7)F_(0-4) transitions in Eu^(3+)and an increase in the absolute PL quantum yield from 3%to 53%(λex=395 nm)compared to the sample synthesized without O_(2).The addition of oxygen also improves the emission color coordinates from(0.571,0.320)to(0.630,0.322)due to the removal of a considerable fraction of oxygen vacancies.The synthesized nanopowders are shown to be highly stable:upon storage under ambient conditions for two years.Quantum yield(QY)of the samples decreases by less than 2%.It is expected that the key features underlying the proposed approach will be useful for various methods used to synthesize oxide nanophosphors.

关 键 词：Photoluminescence Quantum yield Laservaporization Y_(2)0_(3):Eu^(3+) Monoclinic Y_(2)0_(3) RAREEARTHS 

分 类 号：TQ422[化学工程]