Structural and optical characterization of CdS nanoparticles prepared by chemical precipitation method

被引：165

作者：

Singh, Vineet ^{[1
]}

Chauhan, Pratima ^{[1
]}

机构：

[1] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2009年 / 70卷 / 07期

关键词：

Nanostructures; Semiconductors; Chemical synthesis; X-ray diffraction; Optical properties; PHOTOLUMINESCENCE; CRYSTALLITES; ELECTRON; RAMAN;

D O I：

10.1016/j.jpcs.2009.05.024

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present study we have synthesized CdS semiconducting quantum dots by the chemical precipitation method using Thioglycerol as the capping agent. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) are employed to characterize the size, morphology and crystalline structure of the as-prepared material. The synthesized QPs have a mixture of cubical and hexagonal crystal symmetry with 12 nm average diameter. Ultraviolet-visible (UV-vis) absorption spectroscopy is used to calculate the band gap of the material and blue shift in absorption edge. Confinement of the optical phonon modes in the QPs is studied by Raman spectroscopy, while FTIR for identification of chemical bonds in the nanomaterial. Multiple cadmium and sulphur defects were observed by employing the photoluminescence (PL) method. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1074 / 1079

页数：6

共 36 条

[1] Photoluminescence and structural properties of cadmium sulphide thin films grown by different techniques [J].

Aguilar-Hernández, J ;

Contreras-Puente, G ;

Morales-Acevedo, A ;

Vigil-Galán, O ;

Cruz-Gandarilla, F ;

Vidal-Larramendi, J ;

Escamilla-Esquivel, A ;

Hernández-Contreras, H ;

Hesiquio-Garduño, M ;

Arias-Carbajal, A ;

Chavarría-Castañeda, M ;

Arriaga-Mejía, G .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2003, 18 (02) :111-114

[2]

ALETROS L, 1982, SOV PHYS SEMICOND, V16, P772

[3] Perspectives on the physical chemistry of semiconductor nanocrystals [J].

Alivisatos, AP .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (31) :13226-13239

[4] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[5]

BANDARANAYAKE RJ, 1999, APPL PHYS LETT, V67, P830

[6] Effect of the size-induced structural transformation on the band gap in CdS nanoparticles [J].

Banerjee, R ;

Jayakrishnan, R ;

Ayyub, P .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (50) :10647-10654

[7] PHOTOLUMINESCENCE AND RAMAN STUDIES OF CDS FILMS GROWN BY METAL ORGANIC-CHEMICAL VAPOR-DEPOSITION ON SI(111) SUBSTRATES [J].

BERRY, AK ;

AMIRTHARAJ, PM ;

DU, JT ;

BOONE, JL ;

MARTIN, DD .

THIN SOLID FILMS, 1992, 219 (1-2) :153-156

[8] PIEZOSPECTROSCOPIC STUDY OF RAMAN-SPECTRUM OF CADMIUM-SULFIDE [J].

BRIGGS, RJ ;

RAMDAS, AK .

PHYSICAL REVIEW B, 1976, 13 (12) :5518-5529

[9] QUANTUM CRYSTALLITES AND NONLINEAR OPTICS [J].

BRUS, L .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1991, 53 (06) :465-474

[10] A SIMPLE-MODEL FOR THE IONIZATION-POTENTIAL, ELECTRON-AFFINITY, AND AQUEOUS REDOX POTENTIALS OF SMALL SEMICONDUCTOR CRYSTALLITES [J].

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1983, 79 (11) :5566-5571

← 1 2 3 4 →