Optically stimulated persistent luminescence of europium-doped LaAlO3 nanocrystals

被引：32

作者：

Gluchowski, Pawel ^{[1
,2
]}

Strek, Wieslaw ^{[1
]}

Lastusaari, Mika ^{[2
,3
]}

Holsa, Jorma ^{[2
,3
,4
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, Dept Excited States Spect, PL-50422 Wroclaw, Poland

[2] Univ Turku, Dept Chem, FI-20014 Turku, Finland

[3] Univ Turku, Turku Univ, FI-20014 Turku, Finland

[4] Univ Sao Paulo, Inst Chem, BR-05508000 Sao Paulo, SP, Brazil

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 26期

基金：

芬兰科学院;

关键词：

D O I：

10.1039/c5cp00234f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optically stimulated persistent luminescence was investigated for europium-doped LaAlO3 nanocrystals. This system shows conventional luminescence of both the Eu3+ line emission and the weak broad-band emission of Eu2+ upon UV excitation. The persistent luminescence is predominantly associated with the Eu3+ emission, and can be amplified significantly through irradiation with IR at 975 nm. The conventional luminescence from Eu3+ is strongly enhanced when the material is excited simultaneously with both UV and IR radiation. The enhancement of persistent luminescence is accompanied by increased persistent photoconductivity. The charge transfer band of the LaAlO3: Eu3+ nanocrystals in the UV excitation spectra significantly weakens with increasing IR excitation power, also correlating well with the enhancement of persistent luminescence. Finally, a mechanism is presented for the optically stimulated and persistent luminescence in this Eu2+-and Eu3+-doped LaAlO3 material.

引用

页码：17246 / 17252

页数：7

共 30 条

[1] The importance of inversion disorder in the visible light induced persistent luminescence in Cr3+ doped AB2O4 (A = Zn or Mg and B = Ga or Al) [J].