Effect of Thermal Annealing on Structure and Optical Properties of Poly(p-xylylene)-PbS Thin Films Full article
Journal |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Output data | Year: 2019, Volume: 123, Number: 16, Pages: 10517-10528 Pages count : 12 DOI: 10.1021/acs.jpcc.8b12046 | ||||||||||||
Tags | X-RAY-DIFFRACTION; LEAD SULFIDE; ELECTRONIC-PROPERTIES; ELECTRICAL-PROPERTIES; PRESSURE-DEPENDENCE; SIZE-DEPENDENCE; QUANTUM DOTS; BAND-GAP; PBS; STRAIN | ||||||||||||
Authors |
|
||||||||||||
Affiliations |
|
Funding (1)
1 | The Ministry of Education and Science of the Russian Federation | 14.577.21.0273 (RFMEFI57717X0273) (АААА-А17-117122620016-7) |
Abstract:
In this study, wide-angle X-ray diffraction, X-ray absorption spectroscopy, and transmission electron microscopy were employed to address the crystalline structure and morphology of poly(p-xylylene)-PbS nanocomposite thin films prepared by vapor deposition polymerization as well as their evolution upon thermal annealing. It was found that as-synthesized samples with different PbS contents demonstrate similar diffraction patterns that cannot be fully ascribed to a decrease in crystallite size, indicating distorted crystal structure of PbS nanoparticles compared to the bulk PbS. X-ray absorption spectroscopy reveals wide distribution of Pb-S bond lengths with a minimum value of 2.67 Å, which can be attributed to the presence of molecular (PbS) n clusters in the studied films. It was shown that thermal annealing can be used to control the size of PbS nanoparticles and, as a consequence, optical properties of the composite films. The UV-vis absorption spectra demonstrate pronounced red shift of the absorption edge correlated with the growth of PbS nanoparticles upon annealing. Comprehensive analysis of several theoretical models describing the effect of nanoparticles size on optical band gap of the composite material has been performed and compared with the experimental data.
Cite:
Nesmelov A.A.
, Oveshnikov L.N.
, Ozerin S.A.
, Zav'yalov S.A.
, Zubavichus Y.V.
, Orekhov A.S.
, Streltsov D.R.
, Kiryukhin Y.I.
, Chvalun S.N.
Effect of Thermal Annealing on Structure and Optical Properties of Poly(p-xylylene)-PbS Thin Films
The Journal of Physical Chemistry C. 2019. V.123. N16. P.10517-10528. DOI: 10.1021/acs.jpcc.8b12046 WOS Scopus Scopus РИНЦ
Effect of Thermal Annealing on Structure and Optical Properties of Poly(p-xylylene)-PbS Thin Films
The Journal of Physical Chemistry C. 2019. V.123. N16. P.10517-10528. DOI: 10.1021/acs.jpcc.8b12046 WOS Scopus Scopus РИНЦ
Dates:
Submitted: | Dec 14, 2018 |
Accepted: | Mar 28, 2019 |
Published online: | Mar 29, 2019 |
Published print: | Apr 25, 2019 |
Identifiers:
Web of science | WOS:000466053600040 |
Scopus | 2-s2.0-85065094194 , 2-s2.0-85065289088 |
Elibrary | 45550110 |
Chemical Abstracts | 2019:636393 |
Chemical Abstracts (print) | 170:482502 |
OpenAlex | W2934166701 |