Master's Thesis
Optical characterization of advanced nanomaterials with a high lateral resolution
Final Thesis 12.41 MBAuthor of thesis: Ing. Petr Liška
Acad. year: 2020/2021
Supervisor: Ing. Petr Viewegh, Ph.D.
Reviewer: Mgr. Filip Münz, Ph.D.
Abstract:Advanced nanomaterials show a significant improvement in certain physical or functional properties compared to conventional materials. Such advanced materials are, for example, lead halide perovskites (LHP). It is a group of hybrid organic-inorganic materials with a direct bandgap exhibiting unique optical properties. The high quantum efficiency of photoluminescence makes nanocrystals or thin films of LHP suitable candidates
for the production of light-emitting diodes, solar cells and LCD displays. Their inexpensive and simple fabrication together with their unique optical properties makes LHP one of the most developed materials of the last decade.
This diploma thesis aims to study the optical properties of CsPbBr3 perovskite nanocrystals using high lateral resolution methods. CsPbBr3 perovskite nanocrystals show intense anti-Stokes photoluminescence. These nanocrystals can emit light with a lower wavelength than that of the light that causes their photoluminescence. The nanocrystals are prepared in two different ways: by evaporation or by crystallization of the precursor in a solution of dimethylformamide. The morphology, photoluminescence properties and chemical composition of individual nanocrystals are studied. Each nanocrystal is studied individually and its size, shape, photoluminescence properties and chemical compounds are determined, which leads to a deeper understanding of the anti-Stokes photoluminescence of perovskite nanocrystals.
lead halide perovskites, CsPbBr3, anti-Stokes photoluminescence, optical characterization, advanced nanomaterials
Date of defence
15.06.2021
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Process of defence
Po otázkách oponenta bylo diskutováno: Hloubkové profily. Sférická kvantová jáma. Student otázky zodpověděl.
Language of thesis
Czech
Faculty
Department
Study programme
Physical Engineering and Nanotechnology (N-FIN-P)
Composition of Committee
prof. RNDr. Tomáš Šikola, CSc. (předseda)
prof. RNDr. Miroslav Liška, DrSc. (místopředseda)
prof. RNDr. Jiří Komrska, CSc. (člen)
prof. RNDr. Petr Dub, CSc. (člen)
prof. RNDr. Radim Chmelík, Ph.D. (člen)
prof. RNDr. Jiří Spousta, Ph.D. (člen)
doc. Ing. Radek Kalousek, Ph.D. (člen)
doc. Mgr. Adam Dubroka, Ph.D. (člen)
prof. Mgr. Dominik Munzar, Dr. (člen)
RNDr. Antonín Fejfar, CSc. (člen)
prof. RNDr. Bohumila Lencová, CSc. (člen)
doc. Ing. Stanislav Průša, Ph.D. (člen)
Supervisor’s report
Ing. Petr Viewegh, Ph.D.
Grade proposed by supervisor: A
Reviewer’s report
Mgr. Filip Münz, Ph.D.
Grade proposed by reviewer: A