Effect of deposition temperature on the structural and optical properties of CdSe QDs thin films deposited by CBD method

被引：17
|
作者：
Laatar, F. [1 ]
Harizi, A. [2 ]
Smida, A. [1 ]
Hassen, M. [1 ,3 ]
Ezzaouia, H. [1 ]
机构：
[1] Ctr Res & Technol Energy, Photovolta Lab, Tourist Route Soliman,BP 95, Hammam Lif 2050, Tunisia
[2] Tunis El Manar Univ, Dept Ind Engn, Photovolta & Semicond Mat Lab, ENIT, BP 37, Tunis 1002, Tunisia
[3] Higher Inst Appl Sci & Technol Sousse, Ibn Khaldun 4003, Sousse, Tunisia
来源：
MATERIALS RESEARCH BULLETIN | 2016年 / 78卷
关键词：
Thin films; Chemical synthesis; Optical properties; X-ray diffraction; Dielectric properties; NANOCRYSTALLINE CDSE; THICKNESS DEPENDENCE; QUANTUM DOTS; SOLAR-CELLS; CONSTANTS; TRIETHANOLAMINE; SEMICONDUCTORS; PARAMETERS; DISPERSION; BEHAVIOR;
D O I：
10.1016/j.materresbull.2016.02.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cadmium selenide quantum dots (CdSe QDs) thin films were deposited onto glass substrates by a chemical bath deposition (CBD) method at different temperatures from an aqueous solution containing L-Cysteine (L-Cys) as capping agent. The evolution of the surface morphology and elemental composition of the CdSe films were studied by AFM, SEM, and EDX analyses. Structural and optical properties of CdSe thin films were investigated by XRD, UV vis and PL spectroscopy. The dispersion behavior of the refractive index is described using the single oscillator Wemple-DiDomenico (W-D) model, and the physical dispersion parameters are calculated as a function of deposition temperature. The dispersive optical parameters such as average oscillator energy (E-o), dispersion energy (E-d), and static refractive index (n(o)) were found to vary with the deposition temperature. Besides, the electrical free carrier susceptibility (X-e) and the carrier concentration of the effective mass ratio (N/m*) were evaluated according to the Spitzer-Fan model. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：83 / 95
页数：13
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