| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000370398 |
| ISSN: | 0035-001X |
| Authors: | Serrano T1 Gómez, I1 |
| Institutions: | 1Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Monterrey, Nuevo León. México |
| Year: | 2014 |
| Season: | Ene-Feb |
| Volumen: | 60 |
| Number: | 1 |
| Pages: | 14-21 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | The synthesis of PbS/Cu2S core-shell nanoparticles with emission on the visible range and with improved luminescence properties was carried out by the colloidal solution-phase growth method by using simple stabilizers such as trisodium citrate and 3-mercaptopropionic acid. The core shell arrangement for particles with different crystalline structure was achieved, in addition this is the first report related to the synthesis PbS/Cu2S core-shell system. The data obtained from absorption spectra, PL spectra, and HRTEM image provided direct proof of the formation of PbS core with size around 11 nm and Cu2S shell of 5 nm thickness. According to the UV-vis absorption and PL spectrum, the optical characteristics observed in the synthesized material correspond to a PbS/Cu2S system that has a higher confinement effect than the pure PbS nanoparticles. The QY was improved in 15 % from PbS to PbS/Cu2S nanoparticles. The estimated band (HOMO-LUMO) alignment determined by CV measurements corresponds to a type-I core shell arrangement |
| Disciplines: | Física y astronomía |
| Keyword: | Optica, Ingeniería de materiales, Semiconductores, Nanopartículas, Propiedades ópticas |
| Keyword: | Physics and astronomy, Optics, Materials engineering, Semiconductors, Nanoparticles, Optical properties |
| Full text: | Texto completo (Ver PDF) |
