Synthesis, mechanism, optical and electrical characterization of PbTe micro-needles

被引：9

作者：

Kungumadevi, L. ^{[1
]}

Sathyamoorthy, R. ^{[1
]}

机构：

[1] Kongunadu Arts & Sci Coll, PG & Res Dept Phys, Coimbatore 641029, Tamil Nadu, India

来源：

MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 05期

关键词：

Semiconductors; Nanostructures; Chemical synthesis; Electrical properties; Optical properties; THERMOELECTRIC TRANSPORT-PROPERTIES; PBS NANOCRYSTALS; QUANTUM DOTS; COLLOIDAL NANOCRYSTALS; HYDROTHERMAL SYNTHESIS; ELECTROLUMINESCENCE; EVOLUTION;

D O I：

10.1016/j.materresbull.2013.01.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The face-centered cubic PbTe micro-needles were synthesized by a simple aqueous chemical reaction between lead acetate and tellurium in NaOH solution in the presence of Na2HPO4 as reducing reagent at low temperature under atmospheric pressure without any additional surfactants or templates. Micro structural analyses show that these micro-needles are in the range of 90-130 nm in diameter with length similar to 2 mu m. Electrical resistivity of prepared PbTe micro-needles was found to be 14-33 Ohm-cm. The optical absorption spectrum of PbTe micro-needles shows large blue-shift (similar to 1.26 eV) with respect to those of the bulk counterpart (0.32 eV) due to quantum confinement of charge carriers, which is consistent with the blue shift of the band emission peak in the photoluminescence spectrum. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1891 / 1897

页数：7

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