TY - JOUR

T1 - Insights into luminescence thermal quenching of Mn4+-doped BaLa(Na/Li)(W/Te)O6 double perovskite red phosphors

AU - Zhai, Mengyao

AU - Shi, Qiufeng

AU - Ivanovskikh, Konstantin V.

AU - Qiao, Jianwei

AU - Wang, Lei

AU - Guo, Haijie

AU - Huang, Ping

AU - Wang, Xiao-Jun

N1 - This work was supported by the National Natural Science Foundation of China (no. 12204344 and 52102169), the Key Research and Development (R&D) Projects of Shanxi Province (201903D121097), the Natural Science Foundation of Shanxi Province (20210302123127), the China Scholarship Council of Shanxi Province (2022075), and the Young Elite Scientists Sponsorship Program by China Association for Science and Technology (no. YESS20200053). K. V. I. acknowledges partial support from the Ministry of Science and Higher Education of Russia through the basic part of the government mandate, project no. FEUZ–2023–0013.

PY - 2023

Y1 - 2023

N2 - Mn4+ activated red-emitting luminescent materials often suffer from severe temperature quenching. To get insight into the nature of this process and achieve a better thermal stability, a series of BaLa(Na/ Li)WO6:Mn4+ and BaLaLi(W/Te)O-6:Mn4+ far-red emitting luminescent materials have been synthesized using a traditional high-temperature solid-state reaction approach. The samples have been thoroughly characterized by means of XRD, SEM, temperature-dependent photoluminescence spectroscopy and decay kinetics measurements. It is shown that substitution reactions of Na+ and W6+ by Li+ and Te6+, respectively, increase the energy gap between E-2(g) and T-4(2g) states of Mn4+ due to the blue shift of the Mn4+ T-4(2g) excitation band, resulting in noticeable improvement of the thermal stability. The potential mechanism responsible for this observation is proposed. The work demonstrates an effective approach for optimizing luminescence thermal stability of Mn4+-doped inorganic oxide phosphors.

AB - Mn4+ activated red-emitting luminescent materials often suffer from severe temperature quenching. To get insight into the nature of this process and achieve a better thermal stability, a series of BaLa(Na/ Li)WO6:Mn4+ and BaLaLi(W/Te)O-6:Mn4+ far-red emitting luminescent materials have been synthesized using a traditional high-temperature solid-state reaction approach. The samples have been thoroughly characterized by means of XRD, SEM, temperature-dependent photoluminescence spectroscopy and decay kinetics measurements. It is shown that substitution reactions of Na+ and W6+ by Li+ and Te6+, respectively, increase the energy gap between E-2(g) and T-4(2g) states of Mn4+ due to the blue shift of the Mn4+ T-4(2g) excitation band, resulting in noticeable improvement of the thermal stability. The potential mechanism responsible for this observation is proposed. The work demonstrates an effective approach for optimizing luminescence thermal stability of Mn4+-doped inorganic oxide phosphors.

UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=001071791600001

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85173646517

U2 - 10.1039/d3tc02216a

DO - 10.1039/d3tc02216a

M3 - Article

VL - 11

SP - 13865

EP - 13873

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

SN - 2050-7526

IS - 40

ER -