Preparation method of composite conductive silver-lanthanum nickelate thin-film material

Abstract

The invention discloses a preparation method of a composite conductive silver-lanthanum nickelate thin-film material. The preparation method includes the following steps that 1, ethylene glycol monomethyl ether is used as a solvent, and lanthanum nitrate, nickel acetate and silver nitrate are used as a solute to prepare a green transparent solution; 2, the green transparent solution prepared in the step 1 is dropwise added to a substrate for spin coating, spin coating is firstly performed at the speed of 1000 r / min for 9 seconds, and then spin coating is performed at the speed of 4000 r / min for 50 seconds to obtain a precursor wet membrane; 3, the precursor wet membrane obtained in the step 2 is put in a muffle furnace, and annealing treatment is performed at the temperature of 750 DEG for 5 minutes; 4, the steps 2 and 3 are repeated for multiple times to obtain the composite conductive silver-lanthanum nickelate thin-film material with required thickness, wherein the annealing time of the last time is 30 minutes. The preparation method adopts a chemical solution deposition method to effectively improve the electrical conductivity of the composite conductive silver-lanthanum nickelate thin-film material and has the advantages of being simple in process, low in cost, uniform in composition, capable of forming a large-area film and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of conductive thin film materials, and in particular relates to a preparation method of silver-lanthanum nickelate composite conductive thin film materials. Background technique [0002] Ferroelectric thin film materials are a kind of widely used functional thin film materials, which usually use metal thin films such as Pt or Ti as the electrode materials of ferroelectric thin films, but due to the metal itself, the ferroelectric thin films prepared on the metal electrodes have obvious Phenomena of polarization fatigue. Therefore, people think of using conductive metal oxides instead of metals as electrode materials to improve the service life of devices. Lanthanum nickelate is a metal oxide with a perovskite structure, which has excellent properties in many aspects, such as room temperature conductivity and low preparation cost. These excellent properties of the lanthanum nickelate conductive...

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Problems solved by technology

[0002] Ferroelectric thin film materials are a kind of widely used functional thin film materials, which usually use metal thin films such as Pt or Ti as the electrode materials of ferroelectric thin films, but due to the metal itself, the ferroelectric thin films prepared on the metal electrodes have obvious polarization fatigue phenomenon

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