Optical Down-Conversion in Tb3+-Doped Zn-Chalcogenide Quantum Dots

被引：1

作者：

Das, Sandip ^{[1
]}

Mandal, Krishna C. ^{[1
]}

机构：

[1] Univ S Carolina, Dept Elect Engn, Columbia, SC 29208 USA

来源：

NANOSCALE LUMINESCENT MATERIALS 2 | 2012年 / 45卷 / 05期

关键词：

NANOCRYSTAL EMITTERS; EMISSIONS;

D O I：

10.1149/1.3700414

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Large quantities of ZnSe host nanocrystals have been synthesized by a low-cost synthetic chemical route and doped with rare earth (RE) terbium (Tb3+) ions. The resulting RE3+-doped nanocrystals show a complete broadband absorption below their band edge (400-440 nm) to the deep UV region and Tb3+ emission lines in the visible region under room temperature photoluminescence (PL) measurements were observed. Tb3+ energy transition peaks were visible under optical excitation below the band edge of the host ZnSe nanocryatals indicating energy transfer from host ZnSe nanocrystals to the rare earth Tb3+. Our results show for the first time that this novel earth-abundant, environment friendly, cadmium free RE3+-doped nanocrystals can be used as wavelength shifter and as an optical down-converter for enhanced solar spectral matching in solar cells and for various nanoscale optoelectronic device applications.

引用

页码：89 / 94

页数：6

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