Sol-gel fabrication of transparent ferroelectric (K,Na)NbO3/La0.06Ba0.94SnO3 heterostructure

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-21 DOI:10.1016/j.ceramint.2024.09.272

Hao Zhuo , Teng Li , Shudong Hu , Botao Shao , Yanqi Wu , Fanda Zeng , Liqiang Xu , Feng Chen

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引用次数: 0

Abstract

Lead-free K_0.5Na_0.5NbO₃ (KNN) ferroelectric film and transparent La_0.06Ba_0.94SnO₃ (LBSO) bottom electrode are fabricated on (001)-oriented SrTiO₃ (STO) substrate by sol-gel. The characterization results confirm an epitaxial relationship between the films and the substrate, as well as a uniform structure and good crystallization quality of the films. The optical measurement shows that the film heterostructure exhibit a high transmittance with a maximum transmittance of ∼80 %. The polarization-electric field (P-E) curves demonstrate that the twice remanent polarization value of the ∼500 nm thick KNN film reaches up to 28 μC/cm² under an electric field of 800 kV/cm, and the effective piezoelectric strain constant (d₃₃∗) is measured as 24.8 p.m./V. The dielectric properties of the film are displayed, and the leakage behavior can be divided into three stages of Ohmic conduction, Schottky emission and Poole-Frenkel emission with increasing the applied electric field. This study indicates that transparent lead-free ferroelectric KNN heterostructures can be prepared using a cost-effective sol-gel method and shows promise for future applications.

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溶胶-凝胶法制备透明铁电体（K,Na）NbO3/La0.06Ba0.94SnO3 异质结构

利用溶胶-凝胶法在 (001) 取向硒氧化物 (STO) 基质上制备了无铅 K0.5Na0.5NbO3 (KNN) 铁电薄膜和透明 La0.06Ba0.94SnO3 (LBSO) 底电极。表征结果证实了薄膜与基底之间的外延关系，以及薄膜均匀的结构和良好的结晶质量。光学测量结果表明，薄膜异质结构具有很高的透射率，最大透射率可达 ∼ 80 %。极化-电场（P-E）曲线表明，在 800 kV/cm 的电场下，厚度为 500 nm 的 KNN 薄膜的两次剩极化值高达 28 μC/cm2，有效压电应变常数（d33∗）为 24.8 p.m./V。研究显示了薄膜的介电性能，随着外加电场的增加，漏电行为可分为欧姆传导、肖特基发射和普尔-弗伦克尔发射三个阶段。这项研究表明，透明的无铅铁电 KNN 异质结构可以用经济有效的溶胶-凝胶法制备，并有望在未来得到应用。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.