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

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.02.021· OSTI ID:22581557

Harizi, A. ^[1]; Smida, A. ^[2]; Hassen, M. ^[2]; Ezzaouia, H. ^[2]

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1. Photovoltaic and Semiconductor Materials Laboratory, Engineering Industrial Department, ENIT, Tunis El Manar University, BP 37, Le Belvédère, 1002 Tunis (Tunisia)
2. Photovoltaic Laboratory, Centre for Research and Technology Energy, Tourist Route Soliman, BP 95, 2050 Hammam-Lif (Tunisia)

Highlights: • Synthesis of CdSe QDs with L-Cysteine capping agent for applications in nanodevices. • The films of CdSe QDs present uniform and good dispersive particles at the surface. • Effect of bath temperature on the structural and optical properties of CdSe QDs thin films. • Investigation of the optical constants and dispersion parameters of CdSe QDs thin films. - Abstract: 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{sub o}), dispersion energy (E{sub d}), and static refractive index (n{sub o}) were found to vary with the deposition temperature. Besides, the electrical free carrier susceptibility (χ{sub e}) and the carrier concentration of the effective mass ratio (N/m*) were evaluated according to the Spitzer-Fan model.

• OSTI ID: 22581557
• Journal Information: Materials Research Bulletin, Vol. 78; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTROSCOPY
AQUEOUS SOLUTIONS
ATOMIC FORCE MICROSCOPY
CADMIUM SELENIDES
CONCENTRATION RATIO
CYSTEINE
DEPOSITION
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
EFFECTIVE MASS
GLASS
MORPHOLOGY
OSCILLATORS
QUANTUM DOTS
REFRACTIVE INDEX
SCANNING ELECTRON MICROSCOPY
SUBSTRATES
SYNTHESIS
THIN FILMS
X-RAY DIFFRACTION