| dc.contributor.author | Gitonga, Nimrod | |
| dc.contributor.author | Kiprotich, Sharon | |
| dc.contributor.author | Musembi, Michael | |
| dc.date.accessioned | 2025-12-05T13:30:19Z | |
| dc.date.available | 2025-12-05T13:30:19Z | |
| dc.date.issued | 2025-06 | |
| dc.identifier.uri | 10.5923/j.ajcmp.20251401.01 | |
| dc.identifier.uri | http://repository.mut.ac.ke:8080/xmlui/handle/123456789/6900 | |
| dc.description.abstract | The concentration of dopantintroduced into the host nanoparticle alters its structural, optical and morphological
properties. This paper explains the one pot synthesis of zinc doped cadmium selenide nanoparticles (Zn-CdSeNPs) using
L-cysteine as capping agent. The synthesis process was carried out with three necked flask at 90°C. The X-ray diffraction
(XRD) pattern confirms the formation of zinc blende cubic structure. Scherrer equation was used to calculate crystal size, and
the results showed that crystal size decreased with an increase in dopant concentration. Pure CdSe nanoparticles had a crystal
size of 24.66 nm and 15% Zinc doped CdSe had a crystal size of 17.72nm. Results from photoluminescence (PL)
spectroscopy shows that at high concentration of Zn dopant, the emission peak shift to higher wavelength and the intensity of
the peak decreased. 1% zinc doped CdSe nanoparticles had the highest intensity while 15% Zn-CdSe nanoparticles had the
lowest PL intensity.The optical properties of Zn-CdSeNPs were characterized with Ultra Violet visible spectroscopy. Tauc’s
plot was used to obtain the bandgap energies of nanoparticles. The results showed that at 11% Zn-CdSe the bandgap energy
was 1.35 eV and at lower dopant concentration 1% the bandgap energy was 1.92 eV. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | American Journal of Condensed Matter Physics | en_US |
| dc.subject | Bandgap, Dopants, Optical properties, Cadmium selenide, Zinc blende, Nanoparticles | en_US |
| dc.title | Structural, Photoluminescence and Optical Properties of CdSe:Zn Nanoparticles: Effects of Doping Concentrations | en_US |
| dc.type | Article | en_US |
