Anti-thermal quenching of Eu3+ luminescence in negative thermal expansion Zr(WO4)2

Zhou，Liangjun1,2; Wang，Wenxi2; Xu，Dekang1; Wang，Zhenyu2; Yi，Zhibin2; Wang，Min3; Lu，Zhouguang2

2021

10.1016/j.ceramint.2021.09.022

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

Thermal quenching of luminescence is the most critical problem for rare earth doped phosphors used in light-emitting diodes (LEDs). Herein, we demonstrate that thermal quenching can be considerably suppressed via the negative thermal expansion effect in Zr(WO) that serves as host for Eu red emission. The photoluminescence (PL) intensity is surprisingly enhanced by 130% when the temperature is raised from room temperature to 100 °C. As temperature further increases to 160 °C, the PL intensity turns to reduce, which is still 1.4 times of that at room-temperature. Moreover, Zr(WO):15%Eu phosphor has good durability, which still exhibits strong red luminescence (only 13% loss) after being kept in 85 °C/85% relative humidity chamber for 240 h. The anti-thermal quenching of Eu luminescence can be ascribed mainly to the following two factors: first one is the thermal-enhanced energy transfer between Eu ions induced by the contraction of Zr(WO) unit-cell volume that leads to the strong structural rigidity of host lattice; second one would be electron traps in the host that favors the increase of electrons on the excited energy levels. This important anti-thermal quenching effect induced from the negative thermal expansion of the host matrix may stimulates a novel and efficient approach to design highly thermal stable phosphors for next-generation LEDs.

Anti-quenching Negative thermal expansion Phosphor White LED

EI ; SCI

英语

通讯

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20200109141640095] ; National Natural Science Foundation of China[21875097] ; Youth Innovative Talents Project in Colleges and Universities in Guangdong Province[2018KQNCX249] ; Technology Planning Project of Huizhou City[2016X0420035] ; Indigenous Innovation's Capability Development Program of Huizhou University[HZU202013]

Materials Science

Materials Science, Ceramics

WOS:000725094600001

ELSEVIER SCI LTD

20213910952070

Energy transfer ; Europium compounds ; Light emitting diodes ; Luminescence ; Negative thermal expansion ; Phosphors ; Quenching ; Rare earths ; Thermal expansion

Heat Treatment Processes:537.1 ; Thermodynamics:641.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85115787106

Scopus

1.School of Chemistry and Materials,Huizhou University,Huizhou,China
2.Department of Materials Science & Engineering,Southern University of Science and Technology,Shenzhen,China
3.School of Microelectronics,Southern University of Science and Technology,Shenzhen,China

Zhou，Liangjun,Wang，Wenxi,Xu，Dekang,et al. Anti-thermal quenching of Eu3+ luminescence in negative thermal expansion Zr(WO4)2[J]. CERAMICS INTERNATIONAL,2021,47(24):34820-34827.

Zhou，Liangjun.,Wang，Wenxi.,Xu，Dekang.,Wang，Zhenyu.,Yi，Zhibin.,...&Lu，Zhouguang.(2021).Anti-thermal quenching of Eu3+ luminescence in negative thermal expansion Zr(WO4)2.CERAMICS INTERNATIONAL,47(24),34820-34827.

Zhou，Liangjun,et al."Anti-thermal quenching of Eu3+ luminescence in negative thermal expansion Zr(WO4)2".CERAMICS INTERNATIONAL 47.24(2021):34820-34827.