Synthesis, structural, optical and Raman studies of pure and lanthanum doped ZnSe nanoparticles

被引：30

作者：

Kumar, Pushpendra ^{[1
,2
]}

Singh, Jai ^{[1
,3
]}

Pandey, Mukesh Kumar ^{[2
]}

Jeyanthi, C. E. ^{[4
]}

Siddheswaran, R. ^{[5
]}

Paulraj, M. ^{[6
]}

Hui, K. N. ^{[3
]}

Hui, K. S. ^{[7
]}

机构：

[1] Banaras Hindu Univ, Dept Phys, Fac Sci, Varanasi 221005, Uttar Pradesh, India

[2] Acad Sinica, Inst Atom & Mol Sci, Taipei 11529, Taiwan

[3] Pusan Natl Univ, Dept Mat Sci & Engn, Pusan 609735, South Korea

[4] Bharathiar Univ, Ctr Res & Dev, Coimbatore 641046, Tamil Nadu, India

[5] Univ Concepcion, Dept Mat Sci & Engn, Concepcion, Chile

[6] Univ Concepcion, Dept Phys, Fac Phys Sci & Math, Concepcion, Chile

[7] Hanyang Univ, Dept Mech Engn, Seoul 133791, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 49卷

关键词：

Inorganic compounds; Semiconductors; Chemical synthesis; Optical properties; X-ray diffraction; Crystal structure; LOW-TEMPERATURE; QUANTUM WIRES; THIN-FILMS; NANOCRYSTALS; CDSE; TEMPLATE; NANOWIRES; NANORODS; DOTS; PHOTOLUMINESCENCE;

D O I：

10.1016/j.materresbull.2013.08.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, a simple, effective and reproducible chemical synthetic, route for the production of high-quality, pure ZnSe nanoparticles (NPs), and lanthanum-doped ZnSe (ZnSe:La) NPs is presented. The wide bandgap, luminescent pure ZnSe and ZnSe:La NPs has been synthesized at a low temperature (100 degrees C) in a single template-free step. The size and optical bandgap of the NPs was analyzed from powder X-ray diffraction (XRD), UV-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM), and high resolution transmission electron microscopy (HRTEM). A broad photoluminescence (PL) emission across the visible spectrum has been demonstrated by a systematic blue-shift in emission due to the formation of small nanoparticles. Here, contribution to emission intensity from surface states of NPs increases with La doping. TEM data revealed that the average size of ZnSe and ZnSe:La NPs is 14 and 8 nm, respectively. On the other hand, band gap energy E-g of ZnSe and ZnSe:La NPs were found to be 3.59 eV and 3.65 eV, respectively. Results showed that hydrazine hydrate played multiple roles in the formation of ZnSe and ZnSe:La NPs. A possible reaction mechanism for the growth of NPs is also discussed. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：144 / 150

页数：7

共 46 条

[1] OPTICAL-PROPERTIES OF MANGANESE-DOPED NANOCRYSTALS OF ZNS [J].