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Preparation method of oxysalt-based composite charge transport layer of perovskite solar cell

A charge transport layer and solar cell technology, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of carrier recombination loss, low photoelectric conversion efficiency, device short circuit current density, open circuit voltage and fill factor reduction, etc. , to achieve the effect of good repeatability, low production cost, simple and fast preparation process

Pending Publication Date: 2021-12-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The energy band mismatch of the functional layer will lead to serious recombination loss of carriers at the interface in the device, which will reduce the short-circuit current density, open-circuit voltage and fill factor of the device, and the final photoelectric conversion efficiency will not be high

Method used

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  • Preparation method of oxysalt-based composite charge transport layer of perovskite solar cell
  • Preparation method of oxysalt-based composite charge transport layer of perovskite solar cell
  • Preparation method of oxysalt-based composite charge transport layer of perovskite solar cell

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Effect test

Embodiment 1

[0043]Step 1. Preparation of Oxygen Salt Composite Electron Transport Layer

[0044] First weigh 6.1 mg of sodium silicate and dissolve it in 1 mL of tin dioxide solution, wherein the concentration of the tin dioxide solution is 2.5 mg / mL. After stirring at room temperature for 6 h, the precursor solution of the oxygen-containing salt composite electron transport layer to be used was obtained. The conductive ITO substrate was cleaned in acetone, isopropanol, and aqueous solution for 30 minutes, and then cleaned in an oxygen plasma atmosphere for 3 minutes. The ITO substrate was placed in a spin coater, 30 μL of the electron transport layer precursor solution was dropped on the substrate, and spin-coated to form a film. Subsequently, the substrate was sent into a muffle furnace for calcination at 150° C. for 30 minutes to obtain a substrate with an oxygen-containing salt composite electron transport layer.

[0045] figure 1 For the prepared sodium silicate / tin dioxide compos...

Embodiment 2

[0057] First weigh 5.3 mg of sodium carbonate and dissolve it in 1 mL of tin dioxide solution, wherein the concentration of the tin dioxide solution is 2.5 mg / mL. After stirring at room temperature for 6 h, the precursor solution of the oxygen-containing salt composite electron transport layer to be used was obtained. The conductive ITO substrate was cleaned in acetone, isopropanol, and aqueous solution for 30 minutes, and then cleaned in an oxygen plasma atmosphere for 3 minutes. A layer of oxo-salt composite electron transport layer with a thickness of 10 nm was deposited on the ITO conductive substrate by spraying. Subsequently, the substrate was sent into a muffle furnace for calcination at 150° C. for 30 minutes to obtain a substrate with an oxygen-containing salt composite electron transport layer. Dissolve 311.77mg of cesium iodide, 276.61mg of lead iodide, and 220.2mg of lead bromide in 1mL of DMSO, stir for 12h, and configure 1.2mol / L CsPbI 2 Br perovskite precursor...

Embodiment 3

[0060] First weigh 7.1 mg of sodium sulfate and dissolve it in 1 mL of tin dioxide solution, wherein the concentration of the tin dioxide solution is 2.5 mg / mL. After stirring at room temperature for 6 h, the precursor solution of the oxygen-containing salt composite electron transport layer to be used was obtained. The conductive ITO substrate was cleaned in acetone, isopropanol, and aqueous solution for 30 minutes, and then cleaned in an oxygen plasma atmosphere for 3 minutes. A layer of oxo-salt composite electron transport layer with a thickness of 10 nm was deposited on the ITO conductive substrate by spraying. Subsequently, the substrate was sent into a muffle furnace for calcination at 150° C. for 10 minutes to obtain a substrate with an oxygen-containing salt composite electron transport layer. Dissolve 311.77mg of cesium iodide, 276.61mg of lead iodide, and 220.2mg of lead bromide in 1mL of DMSO, stir for 12h, and configure 1.2mol / L CsPbI 2 Br perovskite precursor s...

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Abstract

The invention relates to a preparation method of an oxysalt-based composite charge transport layer of a perovskite solar cell. A film is deposited on a substrate through a solution method, and calcining is preformed to prepare the oxysalt composite charge transport layer; the solution method comprises the following steps: adding oxysalt powder into an oxide nanocrystal solution, uniformly stirring, and then forming a film by adopting spin coating or blade coating or silk-screen printing or spray coating; and the oxysalt is composed of alkali metal cations and oxyacid radical anions. The defect of the perovskite film at the interface is effectively passivated by utilizing the local bonding effect of the oxysalt anions at the interface, so that the performance and long-term stability of the solar cell are improved.

Description

technical field [0001] The invention relates to a preparation method for passivating a perovskite interface with an oxo-acid salt, which can effectively passivate defects on the surface of a perovskite film and improve the efficiency and stability of a solar cell. The charge transport layer has important application value in the field of optoelectronic devices. Background technique [0002] With the development of society, human beings' demand for energy is increasing day by day. Energy shortage and environmental pollution caused by energy use have become important problems to be solved urgently. Solar power technology is a potential clean energy alternative by converting the inexhaustible and inexhaustible solar energy. Among them, perovskite solar cell technology has been developed for about 12 years, and its certified photoelectric conversion efficiency has exceeded 25%, which has a very significant commercial potential. [0003] Since most perovskite light-absorbing la...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/46H01L51/42H01L51/44
CPCH10K71/00H10K30/40H10K30/88H10K2102/00Y02E10/549
Inventor 杨化桂林泽青杨双侯宇
Owner EAST CHINA UNIV OF SCI & TECH
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