Chemical solution deposition as a route to narrow-band gap and room-temperature ferromagnetic perovskite [K0.5Na0.5NbO3]1-x[BaNi0.5Nb0.5O3-δ]x films

被引：1
作者：
Zhai, Xuezhen [1 ,2 ]
Wang, Shizhuo [1 ]
Shang, Cui [1 ]
Yang, Pingxiong [2 ]
机构：
[1] Zhengzhou Univ Light Ind, Sch Phys & Elect Engn, Zhengzhou 450002, Henan, Peoples R China
[2] East China Normal Univ, Dept Elect, Minist Educ, Key Lab Polar Mat & Devices, Shanghai 200241, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH | 2019年 / 34卷 / 21期
基金：
中国国家自然科学基金;
关键词：
K0.5Na0.5NbO3](1-x)[BaNi0.5Nb0.5O3-delta](x); structure; ferromagnetism; optical properties; films; OPTICAL-PROPERTIES; THIN-FILMS; LEAD; EXCHANGE;
D O I：
10.1557/jmr.2019.264
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
[K0.5Na0.5NbO3](1-x)[BaNi0.5Nb0.5O3-delta](x) KNBNNO, 0 pound x pound 0.3) films have been fabricated on different substrates for the first time, using a modified chemical solution deposition method. The microstructure, optical properties, ferromagnetism, and substrate effects of KNBNNO films were assessed, and we found that BaNi0.5Nb0.5O3 -d (BNNO) content was a key factor in determining the properties of the final products. The lower band gap of KNBNNO is due to the band-to-band transition from hybridized Ni 3d and O 2p to Nb 4d states. Moreover, with increasing x from 0 to 0.3, the magnetism transition process of the samples from diamagnetism to ferromagnetism may originate from the competition between ferromagnetic exchange interactions in Ni2+VO2--Ni2+ and superexchange interactions in Ni2+-Ni2+. Notably, absorption behaviors in the visible light wave band for KNBNNO films have been realized, which makes it possible to use KNBNNO films for perovskite solar cell applications.
引用
收藏
页码：3627 / 3635
页数：9
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