University of Oulu

Balanov, V.A., Zhao, Z., Pan, M. et al. Sol–gel synthesis and structural characterization of band gap engineered ferroelectric perovskite oxide potassium sodium barium nickel niobate. J Sol-Gel Sci Technol 96, 649–658 (2020).

Sol–gel synthesis and structural characterization of band gap engineered ferroelectric perovskite oxide potassium sodium barium nickel niobate

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Author: Balanov, Vasilii A.1,2; Zhao, Zhijun3; Pan, Mingjing3;
Organizations: 1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, 90014 Oulu, Finland
2Solution Chemistry of Advanced Materials and Technology Laboratory, ITMO University, 197101 Saint-Petersburg, Russian Federation
3Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstrasse 3A, 30167 Hannover, Germany
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2 MB)
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Language: English
Published: Springer Nature, 2020
Publish Date: 2020-10-15


Ferroelectric materials with engineered thus visible-range optical band gaps are increasingly researched in recent years, triggering potentially new applications in solar cells, opto-ferroelectric devices, multifunctional sensors, and multisource energy harvesters. To date, most band gap engineered ferroelectrics have been discovered in form of ceramics fabricated via the solid-state route. Like other functional counterparts further research of these materials into nanoscale developments, e.g., nanocomposites and thin films, demands nanofabrication methods to be investigated. An emerging band gap engineered ferroelectric composition, (K,Na,Ba)(Ni,Nb)O3−δ (KNBNNO), discovered with solid-state route has allured research for novel applications as mentioned above. However, its nanofabrication via wet chemical routes has rarely been reported. In this paper, sol–gel method is used to fabricate KNBNNO nanoparticles. The developed method can successfully form the target perovskite phases, and is able to reduce the particle size from 300 to 400 nm made via the solid-state reaction to about 100 nm. In addition, the distributed particle size in the synthesized solutions averages at 4–6 nm, making the method suitable for potential thin film fabrication. Therefore, this paper offers a nanofabrication option to the emerging KNBNNO for prospective nanoscale research.

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Series: Journal of sol-gel science and technology
ISSN: 0928-0707
ISSN-E: 1573-4846
ISSN-L: 0928-0707
Volume: 96
Pages: 649 - 658
DOI: 10.1007/s10971-020-05372-2
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: VAB would like to acknowledge the financial support from Erasmus Key Actions (agreement number 2018-1-FI01-KA107-046769). VAB would also like to thank Dr. Elena Krivoshapkina for discussions of synthesis improvement. ZZ, MP, and AF acknowledge the Institute of Mineralogy of Leibniz University Hannover for the use of their equipment. The authors thank Dr. Valeriy Petrov for the discussions of XRD characterization and Dr. Tuomo Siponkoski for the measurements of particle size and zeta potential. YB acknowledges the joint funding by the University of Oulu and Academy of Finland profiling action “Ubiquitous wireless sensor systems” (grant number 24302332), and the Centre for Material Analysis of the University of Oulu for the use of their facilities. Open access funding provided by University of Oulu including Oulu University Hospital.
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