Open Access
Open access
Nanomaterials, volume 10, issue 7, pages 1371

Oxygen Pressure Influence on Properties of Nanocrystalline LiNbO3 Films Grown by Laser Ablation

Z. Vakulov 1
Evgeny Zamburg 2, 3
Daniil Khakhulin 4
Andrey Geldash 4
Dmitriy A Golosov 5
Sergey M Zavadski 5
Konstantin V Rudenko 6
Anatoliy P Dostanko 5
Zhubing He 7
Oleg Ageev 4
Show full list: 11 authors
Publication typeJournal Article
Publication date2020-07-14
Journal: Nanomaterials
scimago Q1
SJR0.798
CiteScore8.5
Impact factor4.4
ISSN20794991
PubMed ID:  32674348
General Chemical Engineering
General Materials Science
Abstract

Energy conversion devices draw much attention due to their effective usage of energy and resulting decrease in CO2 emissions, which slows down the global warming processes. Fabrication of energy conversion devices based on ferroelectric and piezoelectric lead-free films is complicated due to the difficulties associated with insufficient elaboration of growth methods. Most ferroelectric and piezoelectric materials (LiNbO3, BaTiO3, etc.) are multi-component oxides, which significantly complicates their integration with micro- and nanoelectronic technology. This paper reports the effect of the oxygen pressure on the properties of nanocrystalline lithium niobate (LiNbO3) films grown by pulsed laser deposition on SiO2/Si structures. We theoretically investigated the mechanisms of LiNbO3 dissociation at various oxygen pressures. The results of x-ray photoelectron spectroscopy study have shown that conditions for the formation of LiNbO3 films are created only at an oxygen pressure of 1 × 10−2 Torr. At low residual pressure (1 × 10−5 Torr), a lack of oxygen in the formed films leads to the formation of niobium oxide (Nb2O5) clusters. The presented theoretical and experimental results provide an enhanced understanding of the nanocrystalline LiNbO3 films growth with target parameters using pulsed laser deposition for the implementation of piezoelectric and photoelectric energy converters.

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