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Оптичні дослідження надмалих колоїдних наночастинок напівпровідників A2B6 та гетерочастинок на їх основі
Colloidal II–VI semiconductor nanoparticles (NPs) and core-shell NPs obtained by means of colloidal chemistry are studied by means of optical absorption, photoluminescence, and Raman scattering spectroscopy. The effects of the strong confinement of chargecarriers and lattice vibrations in small (&am...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | Ukrainian English |
| Published: |
Publishing house "Academperiodika"
2022
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| Subjects: | |
| Online Access: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2022010 |
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| Summary: | Colloidal II–VI semiconductor nanoparticles (NPs) and core-shell NPs obtained by means of colloidal chemistry are studied by means of optical absorption, photoluminescence, and Raman scattering spectroscopy. The effects of the strong confinement of chargecarriers and lattice vibrations in small (<3 nm) NPs are considered. The influence of the passivating shell onto the electronic bandgap, photoluminescence spectrum, and phonon spectrum is established. The drastic differences in resonant Raman spectra ofultra-small (<2 nm) nanoparticles are found, which are related to the strong spatial localization of vibrations, as well as to the structural rearrangement due to the surface effect. |
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