Growth and Characterization of CdSe1−ySy Nanofilms Obtained by Chemical Bath Deposition



Título del documento: Growth and Characterization of CdSe1−ySy Nanofilms Obtained by Chemical Bath Deposition
Revista: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000398962
ISSN: 0103-9733
Autores: 1
2
3
4
5
6
Instituciones: 1Universidad del Valle de Puebla, Puebla. México
2Instituto Politécnico Nacional, Centro de Investigación en Biotecnología Aplicada, Tlaxcala. México
3Universidad Politécnica de Pachuca, Pachuca, Hidalgo. México
4Instituto Politécnico Nacional, Unidad Profesional Interdisciplinaria de Biotecnología, México, Distrito Federal. México
5Benemérita Universidad Autónoma de Puebla, Instituto de Ciencias, Puebla. México
6Instituto Politécnico Nacional, Centro de Investigación y de Estudios Avanzados, México, Distrito Federal. México
Año:
Periodo: Dic
Volumen: 44
Número: 6
Paginación: 726-732
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés In this work, the growth and characterization of cadmium selenide sulphur (CdSe1−ySy) deposited by chemical bath deposition (CBD) technique at the reservoir temperature of 20±2 °C are presented, varying the thiourea volume added to the growth solution in the range of 0–30 ml. The films chemical stoichiometry was determined by energy-dispersive X-ray spectroscopy (EDS). The X-ray diffraction (XRD) analysis and Raman scattering reveal that CdSe1−ySy-deposited films showed hexagonal wurtzite crystalline phase. The average size of the crystalline grain in relation to the sulphur volume varies in the range of 1.48–9.2 nm that was determined by using the Debye-Scherrer equation for the direction (100), which is confirmed by analyzing the grain average diameter by high-resolution transmission electron microscopy (HRTEM). Raman scattering shows that the lattice dynamics is characteristic of bimodal behaviour and the multipeak adjust of the first optical longitudinal mode for the CdSeS denotes, in all cases, the Raman shift of the characteristic peak in the range of 177–181 cm−1 of the CdSe crystals associated with the sulphur incorporation. CdSe1−ySy band gap energy can be varied from 1.86 to 2.11 eV by varying the thiourea volume added in the growth solution measured by transmittance at room temperature
Disciplinas: Física y astronomía
Palabras clave: Física de materia condensada,
Depósito por baño químico,
Aleaciones,
Películas delgadas
Keyword: Physics and astronomy,
Condensed matter physics,
Chemical bath deposition (CBD),
Alloys,
Thin films
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