Growth of doped PbS:Co2+ nanocrystals by Chemical Bath
Nanocrystalline PbS films grown by chemical bath at T = 40 ß 2 ± C onto glass slides were modified by in situ Co 2+ -doping and their structural and optical properties were examined. By FT-IR spectra, a sharp stretching mode can be seen at ª 1384 cm ° 1 due to the vibration mode of CO 2 3 ions. XRD...
| Autores: | , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | México |
| Institución: | Benemérita Universidad Autónoma de Puebla |
| Repositorio: | Redalyc-BUAP |
| OAI Identifier: | oai:redalyc.org:57046491008 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57046491008 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas doping quantum Thin films nanocrystals confinement effect |
| Sumario: | Nanocrystalline PbS films grown by chemical bath at T = 40 ß 2 ± C onto glass slides were modified by in situ Co 2+ -doping and their structural and optical properties were examined. By FT-IR spectra, a sharp stretching mode can be seen at ª 1384 cm ° 1 due to the vibration mode of CO 2 3 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 ª 28 nm and ª 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 ª 1 : 21 ° 2 : 21 eV range, associated with quantum confinement effect. Raman peaks at ª 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. |
|---|