TY - JOUR

T1 - Sol–gel synthesis and structural characterization of band gap engineered ferroelectric perovskite oxide potassium sodium barium nickel niobate

AU - Balanov, Vasilii A.

AU - Zhao, Zhijun

AU - Pan, Mingjing

AU - Feldhoff, Armin

AU - Bai, Yang

N1 - Funding Information: 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.

PY - 2020/12/1

Y1 - 2020/12/1

N2 - 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. [Figure not available: see fulltext.]

AB - 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. [Figure not available: see fulltext.]

KW - KNBNNO

KW - KNN–BNNO

KW - Lead-free

KW - Nanoparticle

KW - Photo-ferroelectric

KW - Sol–gel

UR - http://www.scopus.com/inward/record.url?scp=85088387297&partnerID=8YFLogxK

U2 - 10.1007/s10971-020-05372-2

DO - 10.1007/s10971-020-05372-2

M3 - Article

AN - SCOPUS:85088387297

VL - 96

SP - 649

EP - 658

JO - Journal of Sol-Gel Science and Technology

JF - Journal of Sol-Gel Science and Technology

SN - 0928-0707

IS - 3

ER -