Structural and Optical Properties of Co2+-Doped PbSe Nanocrystals in Chalcogeneide Glass Matrix

被引：18

作者：

Lourenco, Sidney A. ^{[1
]}

Silva, Ricardo S. ^{[2
]}

Silva, A. C. A. ^{[3
]}

Dantas, Noelio O. ^{[3
]}

机构：

[1] Univ Tecnol Fed Parana UTFPR, Engn Mat, BR-86812460 Londrina, Parana, Brazil

[2] Univ Fed Triangulo Mineiro, Dept Fis, BR-38025440 Uberaba, MG, Brazil

[3] Univ Fed Uberlandia, Inst Fis, LNMIS, BR-38400902 Uberlandia, MG, Brazil

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 23期

关键词：

TETRAHEDRALLY COORDINATED CO2+; CRYSTAL-FIELD SPECTRA; ABSORBER Q-SWITCH; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; ENERGY-TRANSFER; EMISSION; IONS; LUMINESCENCE; GAP;

D O I：

10.1021/acs.jpcc.5b01920

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：

Semimagnetic chalcogeneide Pb1-xCoxSe nanocrystals were successfully synthesized by a fusion protocol in a glass matrix and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), magnetic force microscopy (MFM), and optical absorption (OA) techniques. XRD, TEM, and MFM measurements show that the as-produced Pb1-xCoxSe magnetic nanocrystals are single phases, nanosized, and crystallized in rock-salt structures. The OA spectra and crystal field theory indicate that part of Co2+ is incorporated in the tetrahedral site (T-d) into PbSe nanocrystals, presenting characteristic structures in the visible and near-IR electromagnetic spectral range. The crystal field strength and Racah parameters are estimated for the tetrahedral coordinated Co2+ ions into PbSe nanocrystals.

引用

页码：13277 / 13282

页数：6

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