TY  - CONF
AU  - Chukova, Oksana
AU  - Kotlov, Aleksei
AU  - Jacobsohn, Luiz
AU  - Hizhnyi, Yuriy
AU  - Voitenko, Tetiana
AU  - Fesych, Ihor
TI  - Engineering of spectral properties of ZnO nanoparticles in PVA media: green synthesis and theoretical analysis
JO  - IEEE Proceedings
PB  - IEEE
M1  - PUBDB-2025-04340
SN  - 979-8-3315-8799-4
SP  - 8
PY  - 2025
AB  - This work is devoted to development of luminescent materials based on ZnO nanoparticles synthesized in polymer media by modified co-precipitation method using green chemistry principles. The polyvinyl alcohol (PVA) media have caused great impact on the absorption and luminescence properties of the synthesized ZnO-xPVA nanoparticles. The spectra of the pure ZnO samples contain a narrow a band around 385 nm and a broad band peaked at 510 nm, while the spectra of the ZnO-xPVA samples are dominated by a band in the red spectral region. The assumption was made that these bands are related to donor-acceptor recombination transitions between Zni and Oi or Hi defect energy levels. Theoretical calculations of the electronic structure of ZnO crystals containing a set of point defects including Hi and Ci their combinations with Oi native defects were carried out. The density functional theory (DFT) band-periodic method within the super-cell approach was used to verify this assumption. Results of the calculations of the optical spectra were compared with spectral features of the samples, including low temperature and high energy excitations of the ZnO-xPVA nanoparticles.
T2  - 2025 IEEE 15th International Conference Nanomaterials: Applications & Properties Bratislava, SLOVAKIA, Sep. 7-12, 2025
CY  - 8 Sep 2025 - 12 Sep 2025, Bratislava (Slovakia)
Y2  - 8 Sep 2025 - 12 Sep 2025
M2  - Bratislava, Slovakia
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.1109/NAP68437.2025.11216209
UR  - https://bib-pubdb1.desy.de/record/639218
ER  -