Effect of Thermal Annealing on Structure and Optical Properties of Poly(p-xylylene)-PbS Thin Films
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
The Journal of Physical Chemistry C
ISSN: 1932-7447
, E-ISSN: 1932-7455
|
| Вых. Данные |
Год: 2019,
Том: 123,
Номер: 16,
Страницы: 10517-10528
Страниц
: 12
DOI:
10.1021/acs.jpcc.8b12046
|
| Ключевые слова |
X-RAY-DIFFRACTION; LEAD SULFIDE; ELECTRONIC-PROPERTIES; ELECTRICAL-PROPERTIES; PRESSURE-DEPENDENCE; SIZE-DEPENDENCE; QUANTUM DOTS; BAND-GAP; PBS; STRAIN |
| Авторы |
Nesmelov A.A.
1,2
,
Oveshnikov L.N.
1,3
,
Ozerin S.A.
1
,
Zav'yalov S.A.
1
,
Zubavichus Ya.V.
1,4
,
Orekhov A.S.
1,5
,
Streltsov D.R.
1,2,6
,
Kiryukhin Y.I.
1
,
Chvalun S.N.
1,2,6
|
| Организации |
| 1 |
National Research Center Kurchatov Institute, Moscow, 123182, Russian Federation
|
| 2 |
MIREA, Russian Technological University, Moscow, 119454, Russian Federation
|
| 3 |
P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, 119991, Russian Federation
|
| 4 |
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
|
| 5 |
Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, 141701, Russian Federation
|
| 6 |
Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences, Moscow, 117393, Russian Federation
|
|
Информация о финансировании (1)
|
1
|
Министерство образования и науки Российской Федерации
|
14.577.21.0273 (RFMEFI57717X0273) (АААА-А17-117122620016-7)
|
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.