US 2026/0206492 A1 · METHOD FOR PREPARING DOUBLE-LAYER HALIDE PEROVSKITE FILM USING ECO-FRIENDLY SOLVENT, PEROVSKITE FILM PREPARED THEREBY AND ENERGY HARVESTING DEVICE COMPRISING SAME

Abstract

The present invention relates to a method for preparing a halide perovskite film having a double-layer structure and excellent piezoelectric performance by using an eco-friendly solvent, a perovskite film prepared by using the same, and an energy harvesting device comprising the same. In the present invention, by using lactate ester and monoterpene, which are eco-friendly solvents, as solvents of the halide perovskite precursor, the perovskite layers can be stably formed, and a perovskite film having very excellent piezoelectric performance can be prepared according to the formation of a double-layer structure of a three-dimensional perovskite and a zero-dimensional perovskite. Therefore, by using the present invention, an environmental pollution problem caused by the use of a solvent during the formation of the perovskite film can be solved, and the piezoelectric performance of the film can be greatly improved through optimization of materials and structure.

Claims15

Dependent claims

A method for preparing a double-layer halide perovskite film, comprising steps of:

(i) respectively preparing a first precursor solution comprising a precursor material of a three-dimensional halide perovskite and a lactate ester solvent, and a second precursor solution comprising a zero-dimensional halide perovskite material and a monoterpene solvent;
(ii) forming a three-dimensional halide perovskite layer by coating the first precursor solution on a substrate;
and
(iii) forming a zero-dimensional halide perovskite layer by coating the second precursor solution on the three-dimensional halide perovskite layer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

19/424,821Filed 18 Dec 2025

Priority

KR 10-2023-007788519 Jun 2023

Published

16 Jul 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H10N 30/077
By depositing piezoelectric or electrostrictive layers, e.g. aerosol or screen printing: by liquid phase deposition
H10N 30/092
Forming piezoelectric or electrostrictive materials: forming composite materials
H10N 30/30
Piezoelectric or electrostrictive devices: with mechanical input and electrical output, e.g. functioning as generators or sensors
H10N 30/50
Piezoelectric or electrostrictive devices: having a stacked or multilayer structure

Method for preparing double-layer halide perovskite film using eco-friendly solvent, perovskite film prepared thereby and energy harvesting device comprising same

Life of this patent

Method for preparing double-layer halide perovskite film using eco-friendly solvent, perovskite film prepared thereby and energy harvesting device comprising same

Life of this patent

Abstract

Claims15