Growth of doped PbS:Co2+ nanocrystals by Chemical Bath
Título del documento: Growth of doped PbS:Co2+ nanocrystals by Chemical Bath
Revista: Revista mexicana de física
Base de datos: PERIÓDICA
Número de sistema: 000425506
ISSN: 0035-001X
Autores: 1
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Instituciones: 1Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Puebla. México
2Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Físico Matemáticas, Puebla. México
3Benemérita Universidad Autónoma de Puebla, Centro Universitario de Vinculación y Transferencia de Tecnología, Puebla. México
Año:
Periodo: Oct
Volumen: 62
Número: 5
País: México
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, teórico
Resumen en inglés Nanocrystalline PbS films grown by chemical bath at T = 40 ± 2 oC onto glass slides were modified by in situ Co2+ -doping and their structural and optical properties were examined. By FT-IR spectra, a sharp stretching mode can be seen at ~1384 cm-1 due to the vibration mode of C O 3 2 ions. XRD patterns shown the growth on the zinc blende crystalline face. The grain size was determined by using X-rays diffractograms and was found at ~28 nm and ~13 - 25 nm for undoped and doped samples, respectively. Optical absorption spectra was used for calculating the energy band gap, and displayed a shift in the ~1:21 - 2:21 eV range, associated with quantum confinement effect. Raman peaks at ~ 210, 271, and 451 cm-1, corresponding to a 1LO phonon mode, a two-phonon process, and a 2LO phonon mode respectively were also recorded. The surface and grain size of the films were measured by AFM studies
Disciplinas: Física y astronomía
Palabras clave: Física,
Películas delgadas,
Nanocristales,
Cuántica,
Efecto de confinamiento
Keyword: Dopaje,
Physics,
Thin films,
Nanocrystals,
Quantum,
Confinement effect,
Doping
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