Microstructure and Near Infrared Absorption of PbS Films Deposited by Chemical Bath Deposition on p-Type Si(100) Wafers
Título del documento: Microstructure and Near Infrared Absorption of PbS Films Deposited by Chemical Bath Deposition on p-Type Si(100) Wafers
Revista: Brazilian journal of physics
Base de datos: PERIÓDICA
Número de sistema: 000398958
ISSN: 0103-9733
Autores: 1
2
1
1
1
1
Instituciones: 1Zhengzhou University, School of Physics and Engineering, Zhengzhou, Henan. China
Año:
Periodo: Dic
Volumen: 44
Número: 6
Paginación: 697-702
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés Nanocrystalline PbS films were synthesized on p-type Si(100) wafers using chemical bath deposition. All of the PbS films are polycrystalline in nature with facecentered cubic (fcc) rock salt structure. The average crystallite size varied from 20 to 74 nm, thereby indicating nanocrystalline films with different molar ratios. The film composed of irregular particles was homogeneous and well adhered to the substrates. Increase in thiourea concentration from 0.5 to 2.0 M resulted into an increase in the lateral particle size and film thickness, while further increase in thiourea concentration caused a decrease in particle size and film thickness. The absorption edge of the films blueshifted slightly with increased molarities of lead sources, blueshifted initially, and then redshifted with increased molarities of sulfur sources at a fixed lead source molarities. The blueshift and redshift of the absorption edge were closely related to the change in the tensile stress of the PbS films subjected to
Disciplinas: Física y astronomía
Palabras clave: Física de materia condensada,
Depósito por baño químico,
Sulfuro de plomo,
Nanocristales,
Películas delgadas
Keyword: Physics and astronomy,
Condensed matter physics,
Chemical bath deposition (CBD),
Lead sulfide,
Nanocrystals,
Thin films
Texto completo: Texto completo (Ver PDF)