Laser induced white emission generation from La1-xNdxAlO3 nanocrystals

被引：9

作者：

Goncalves, Joao Marcos ^{[1
]}

Stefanski, Mariusz ^{[1
]}

Tomala, Robert ^{[1
]}

Musialek, Agata ^{[1
]}

Strek, Wieslaw ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, Okolna 2, PL-50422 Wroclaw, Poland

来源：

DALTON TRANSACTIONS | 2023年 / 52卷 / 07期

关键词：

UP-CONVERSION; NEODYMIUM; FLUORESCENCE; LANTHANIDES; TRANSITIONS; SPECTRA; GLASSES; POWDERS; IONS;

D O I：

10.1039/d2dt03553g

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis and structural characteristics of nanocrystalline LaAlO3 perovskites doped with different concentrations of Nd3+ ions are reported. Their excitation and Stokes emission spectra, in which significant concentration quenching was observed, were recorded and characterized. The measurements of anti-Stokes laser induced white emission (LIWE) spectra were also performed. It was found that the LIWE intensity increased exponentially with the excitation laser power above the excitation threshold. In particular, the concentration and pressure dependences of the LIWE spectra of La1-xNdxAlO3 were investigated. Despite the pronounced concentration quenching observed in the Stokes emission, no such effect could be observed in the anti-Stokes one. A possible inter-valence charge transfer (IVCT) mechanism for the white emission, in which different bands that were observed correspond to different valences of Nd, is proposed.

引用

页码：2073 / 2079

页数：7

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