Large negative photoresistivity in amorphous NdNiO₃ film
|Author:||Stupakov, Alexandr1; Kocourek, Tomas1; Nepomniashchaia, Natalia1,2;|
1Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18221 Prague, Czech Republic
2Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Technická 2, 16627 Prague, Czech Republic
3Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P.O. Box 4500, FI-90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 3.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022020918390
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2022-02-09
A significant decrease in resistivity by 55% under blue lighting with ~0.4 J·mm⁻² energy density is demonstrated in amorphous film of metal-insulator NdNiO₃ at room temperature. This large negative photoresistivity contrasts with a small positive photoresistivity of 8% in epitaxial NdNiO₃ film under the same illumination conditions. The magnitude of the photoresistivity rises with the increasing power density or decreasing wavelength of light. By combining the analysis of the observed photoresistive effect with optical absorption and the resistivity of the films as a function of temperature, it is shown that photo-stimulated heating determines the photoresistivity in both types of films. Because amorphous films can be easily grown on a wide range of substrates, the demonstrated large photo(thermo)resistivity in such films is attractive for potential applications, e.g., thermal photodetectors and thermistors.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
This research was funded by the Czech Science Foundation (GA ČR), grant number 20-21864S.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).