Sm-modified bismuth layer-structured SrBi2Nb2O9 multifunctional ceramics with enhanced electrical properties and good photoluminescence properties. Issue 13 (1st July 2022)

• Record Type: Journal Article
• Authors: Zhang, Yuying; Xu, Tao; Yu, Haibo; Chu, Ruiqing; Li, Guorong; Zhang, Chao; Xu, Zhijun
• Is Part Of: Ceramics international. Volume 48:Issue 13(2022)
• Page Start: 18989
• Page End: 18998
• Publication Date: 2022-07-01
• Subjects: Ceramics -- Electrical properties -- Photoluminescence -- DFT calculation; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.03.182
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A series of Sr1- x Sm x Bi2 Nb2 O9 (abbreviated as SBN- x Sm) multifunctional ceramics with orthorhombic structure were prepared by solid-state synthesis method. The effects of Sm 3+ doping on the microstructure, electrical performances and photoluminescence (PL) intensity of SBN- x Sm solid solution were comprehensively discussed. XRD and SEM were performed to analysis microscopic properties, which identified that all samples formed a single phase with dense microstructure. At x = 0.004, samples possess enhanced ferroelectric performance (2 P r = 10.8 μC/cm 2 ), piezoelectric coefficient ( d 33 = 17 pC/N) and excellent thermal stability. Photoluminescence spectra reveal that the samples exhibit intense red emission at 601 nm, which derives from the 4 G5/2 → 6 H7/2 transition under 406 nm laser excitation. Moreover, the energy band diagram according to density functional theory (DFT) shows that the energy band gap ( E g ) decreases as x increases, which can illustrate the microscopic mechanisms of luminous intensity variation. The above results indicate that SBN- x Sm ceramics are promising materials for multifunctional application devices.