Method for preparing doped perovskite thin film battery by dissolving lead iodide at room temperature

A thin-film battery, perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor stability, low repeatability, restricting applications, etc., to improve stability, improve solubility, and improve battery conversion efficiency. Effect

Active Publication Date: 2017-01-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its sensitivity to water vapor, poor stability ...

Method used

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  • Method for preparing doped perovskite thin film battery by dissolving lead iodide at room temperature
  • Method for preparing doped perovskite thin film battery by dissolving lead iodide at room temperature
  • Method for preparing doped perovskite thin film battery by dissolving lead iodide at room temperature

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Embodiment 1

[0031] In this embodiment, the method for dissolving lead iodide at room temperature to prepare a doped perovskite thin film battery is as follows:

[0032] 1. Ultrasonic cleaning the substrate with detergent, acetone, absolute ethanol, and deionized water in sequence, and then drying the substrate with nitrogen; the substrate is FTO transparent conductive glass, and its square resistance is ~15Ω / sq;

[0033] 2. Spin-coat isopropoxy titanic acidic solution on the substrate treated in step 1, sinter in air at 450°C for 30min, and then soak in 40mM TiCl 4 solution, treated at 70°C for 30 minutes, and finally sintered at 450°C for 30 minutes to obtain a dense electron transport layer TiO 2 film.

[0034] The preparation process of the isopropoxytitanium acidic solution is as follows: 730 μL of isopropoxytitanium (Ti{OCH(CH 3 ) 2} 4) was added to 5 mL of ethanol to obtain solution A, 69 μL of 2M HCl was added to 5 mL of ethanol to obtain solution B, and solution A and solution...

Embodiment 2

[0039] 1. Ultrasonic cleaning the substrate with detergent, acetone, absolute ethanol, and deionized water in sequence, and then drying the substrate with nitrogen; the substrate is FTO transparent conductive glass, and its square resistance is ~15Ω / sq;

[0040] 2. Spin-coat isopropoxy titanic acidic solution on the substrate treated in step 1, sinter in air at 450°C for 30min, and then soak in 40mM TiCl 4 solution, treated at 70°C for 30 minutes, and finally sintered at 450°C for 30 minutes to obtain a dense electron transport layer TiO 2 film.

[0041] The preparation process of the isopropoxytitanium acidic solution is as follows: 730 μL of isopropoxytitanium (Ti{OCH(CH 3 ) 2} 4 ) was added to 5 mL of ethanol to obtain solution A, 69 μL of 2M HCl was added to 5 mL of ethanol to obtain solution B, and solution A and solution B were mixed uniformly to obtain an acidic solution of isopropoxytitanium.

[0042] 3. Spin-coat NH on the electron transport layer 4 Cl and PbI 2...

Embodiment 3

[0047] 1. Ultrasonic cleaning the substrate with detergent, acetone, absolute ethanol, and deionized water in sequence, and then drying the substrate with nitrogen; the substrate is FTO transparent conductive glass, and its square resistance is ~15Ω / sq;

[0048] 2. Spin-coat isopropoxy titanic acidic solution on the substrate treated in step 1, sinter in air at 450°C for 30min, and then soak in 40mM TiCl 4 solution, treated at 70°C for 30 minutes, and finally sintered at 450°C for 30 minutes to obtain a dense electron transport layer TiO 2 film.

[0049] The preparation process of the isopropoxytitanium acidic solution is as follows: 730 μL of isopropoxytitanium (Ti{OCH(CH 3 ) 2} 4 ) was added to 5 mL of ethanol to obtain solution A, 69 μL of 2M HCl was added to 5 mL of ethanol to obtain solution B, and solution A and solution B were mixed uniformly to obtain an acidic solution of isopropoxytitanium.

[0050] 3. Spin-coat NH on the electron transport layer 4 Cl and PbI 2...

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Abstract

The invention discloses a method for preparing a doped perovskite thin film battery by dissolving lead iodide at a room temperature. A battery structure sequentially comprises a conductive substrate 1, an electron transport layer 2, a doped perovskite absorption layer 3, a hole transport layer 4 and a top electrode 5 from bottom to top, wherein the doped perovskite absorption layer is prepared by first dissolving ammonium chloride and lead iodide in a DMF solvent according to a certain mole ratio and performing vibration for 2-3 minutes at the room temperature, then spin-coating the mixture on a substrate, and finally depositing an organic halide (MAI, FAI or MAI/FAI mixture) by a CVD (Chemical Vapor Deposition) reaction or spin-coating the organic halide by a solution method. The perovskite thin film battery is prepared by using the ammonium chloride to help dissolve the lead iodide, thus, the lead iodide can be effectively prevented from being difficult to dissolve or a crystal can be effectively prevented from being easy to separate out in the spin-coating process, a metastable state in the preparation process of a polar solvent is prevented, the preparation of a thin film is facilitated, perovskite nucleation growth is facilitated, and the battery conversion efficiency is improved; and moreover, a large-area perovskite thin film battery can be prepared at the room temperature.

Description

technical field [0001] The invention relates to a preparation method of a novel thin-film solar cell, in particular to a method for preparing a doped perovskite thin-film cell by dissolving lead iodide at room temperature. Background technique [0002] With the depletion of non-renewable energy such as oil and coal and the CO generated during use 2 , SiO 2 Such gases and dusts have caused the global greenhouse effect, acid rain and the increase of PM 2.5 index, seriously affecting our health and endangering the natural environment on which human beings depend. The development and utilization of renewable new energy will be the theme of human development in the future, and solar energy directly converts light into heat and electricity, which is non-polluting and inexhaustible to the environment. It is an important way to solve the global energy crisis and reduce pollution. Solar cells mainly convert light into electricity. At present, silicon-based solar cells and thin-film...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K30/151Y02E10/549
Inventor 蒋阳童国庆蓝新正宋自航李国鹏仲洪海
Owner HEFEI UNIV OF TECH
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