Perovskite film preparation method based on anti-solution bath, and solar cell

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of difficult to prepare large area, large human factors, complex process, etc., to improve carrier concentration and extraction efficiency, optimize Crystal growth and physicochemical properties, the effect of reducing the concentration of surface defect states

Active Publication Date: 2019-06-18
PEKING UNIV
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AI Technical Summary

Problems solved by technology

However, due to the grain boundaries and crystal defects of the perovskite film itself, as well as the interface contact between it and the carrier transport layer, the carrier recombination is serious during the device operation, which leads to the open circuit voltage and filling of the solar cell. Factor decline, which is a common problem in the preparation and production of perovskite solar cells
Among the reported perovskite thin film preparation methods, the most efficient preparation process is the "one-step method" to drop anti-solvent, but the process is complicated, the human factors are large, and it is difficult to prepare large-area devices, which limits the perovskite solar cells. technological development
Therefore, the key issue is to be able to prepare high-quality perovskite thin films through simple and repeatable technical means, so as to accelerate the industrialization process of perovskite solar cells.

Method used

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  • Perovskite film preparation method based on anti-solution bath, and solar cell
  • Perovskite film preparation method based on anti-solution bath, and solar cell
  • Perovskite film preparation method based on anti-solution bath, and solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In the first step, use deionized water, acetone, optical glass cleaner, deionized water, and isopropanol to ultrasonically clean the ITO glass substrate (15Ω / □). After drying in an oven at 60°C for 6 hours, spin-coated SnO with a concentration of 5wt% on the ITO surface 2 Nanoparticle dispersion, wherein the solvent used is distilled water. The spin coating speed is 3000rpm, and the spin coating time is 20s. Subsequently, the substrate was transferred to a heating table and annealed at 150°C for 30 minutes.

[0033] The second step is to add SnO 2 Film substrate transfer to N 2 Atmosphere glove box, and load 1.3mol / L perovskite precursor liquid on SnO 2 On the film, the spin coating speed is 6000 rpm, and the spin coating time is 10 s. The formula of the perovskite precursor fluid is: the chemical composition is FA 0.81 MA 0.10 Cs 0.04 PbI 2.55 Br 0.40 The perovskite is dissolved in a mixed solvent of DMF, DMSO and NMP (V / V / V=15:4:1). After the spin coating is finished, ...

Embodiment 2

[0037] In the second step, the solute of the counter solution was replaced with pyrazine, and the optimal concentration was 2-10 mmol / L. The preparation method of the remaining steps was the same as in Example 1. The energy conversion efficiency of such perovskite solar cells can reach -20%.

Embodiment 3

[0039] In the second step, the solute of the counter solution is replaced with formamidine hydrochloride, the optimal concentration is 4-12 mmol / L, and the preparation method of the remaining steps is the same as in Example 1. The energy conversion efficiency of such perovskite solar cells can reach -20%.

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Abstract

The invention discloses a perovskite film preparation method based on an anti-solution bath, and a solar cell. A proper solute is added into an anti-solvent to prepare anti-solutions with different functions; crystallization control and morphology regulation of a perovskite film are realized; and meanwhile, an interface between the perovskite film and a carrier transmission layer is passivated, sothat the surface defect state and the interface recombination are reduced, the carrier concentration and the extraction efficiency at the interface are improved, and the carrier transmission is better facilitated. The perovskite solar cell prepared with the anti-solution bath method has relatively high photoelectric conversion efficiency and high stability. The preparation method is simple and convenient, relatively short in production period and high in controllability and repeatability, and has a wide application prospect in the production and preparation of large-area and large-scale perovskite solar cells.

Description

Technical field [0001] The invention belongs to the technical field of photoelectric functional materials and devices, and specifically relates to a method for preparing a perovskite film based on an inverse solution bath and a solar cell. Background technique [0002] With the rapid transformation and development of social economy and science and technology, the demand for energy in human society is also growing rapidly. Non-renewable fossil energy is the main force in the past and present energy system. However, the exhaustion crisis of fossil energy and the increasing environmental pollution have prompted us to actively seek low-cost, clean and efficient renewable energy. Among the many existing new energy sources, solar energy has attracted much attention because of its high energy density, abundant reserves, and clean use. Solar power generation is an emerging renewable energy technology. However, the currently widely used silicon-based solar cells have high cost and compli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCY02E10/549Y02P70/50
Inventor 朱瑞张翼飞涂用广杨晓宇龚旗煌
Owner PEKING UNIV
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