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Method for forming electron transport layer of perovskite solar cell

A technology for solar cells and electron transport layers, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of large thickness of electron transport layers, unfavorable carrier separation and collection, and unfavorable perovskite solution filling, etc. Spread uniformity and high printing efficiency

Active Publication Date: 2020-01-07
HUBEI WONDER SOLAR LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The design and fabrication of large-area perovskite solar cells is the prerequisite for the industrialization of perovskite solar cells. , generally used in the field of thick film printing in screen printing, the micron-scale film thickness scale is much larger than the mean free path of carrier diffusion, which is not conducive to the separation and collection of carriers; Facilitate the filling of perovskite solution in the preparation process of mesoscopic perovskite solar cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The electrode surface of the substrate is treated with an ultraviolet ozone cleaning machine for the first ultraviolet ozone treatment. The substrate is conductive glass, the size is 250mm×300mm, the electrode is FTO, the light transmittance of the electrode is 99%, and the surface of the electrode surface is square The root roughness is 20nm; the wavelength of the ultraviolet light of the ultraviolet ozone treatment is set to 185nm and 254nm, the ozone concentration is 50vol%, and the substrate is cleaned for 10min at 50Hz to obtain the printing substrate.

[0027] (2) Titanium dioxide (particle size 18-40nm, specific surface area 75.18-86.21m 2 / g) Disperse in terpineol and disperse in a three-roller to obtain a mesoporous titanium dioxide slurry with a viscosity of about 220 mPa·s and a solid content of 18 wt%.

[0028] The above mesoporous titanium dioxide slurry is deposited on the printing substrate by screen printing technology to form a mesoporous titanium dioxide...

Embodiment 2

[0031] (1) The electrode surface of the substrate is treated with ultraviolet ozone using an ultraviolet ozone cleaning machine. The substrate is conductive glass, the size is 250mm×300mm, the electrode is FTO, the light transmittance of the electrode is 99%, and the surface root mean square of the electrode surface is rough The intensity is 20nm; the wavelength of the ultraviolet light of the ultraviolet ozone treatment is set to 185nm and 254nm, the ozone concentration is 50vol%, and the substrate is cleaned at 50Hz for 10min to obtain the printing substrate.

[0032] (2) Titanium dioxide (particle size 18-40nm, specific surface area 75.18-86.21m 2 / g) Disperse in terpineol, and disperse in a three-roll machine to obtain a mesoporous titanium dioxide slurry with a viscosity of about 220 mPa·s and a solid content of 18 wt%.

[0033] The above mesoporous titanium dioxide slurry is deposited on the printing substrate by screen printing technology to form a mesoporous titanium dioxide...

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Abstract

The invention discloses a method for forming an electron transport layer of a perovskite solar cell, and the method comprises the steps: (1) carrying out the first ultraviolet ozone processing of an electrode surface of a substrate, and obtaining a printing substrate; (2) depositing mesoporous titanium dioxide slurry on the printing substrate through a silk-screen printing technology to form a mesoporous titanium dioxide wet film; (3) carrying out second ultraviolet ozone treatment on the substrate with the mesoporous titanium dioxide wet film again, performing drying and sintering to obtain the mesoporous titanium dioxide electron transport layer. According to the forming method, an ultrathin high-quality large-area mesoporous titanium dioxide film can be formed.

Description

Technical field [0001] The invention relates to a method for forming an electron transport layer of a perovskite solar cell. Background technique [0002] Perovskite solar cells have been receiving widespread attention due to their high photoelectric conversion efficiency and low material costs, and are considered to be the next generation of new solar cells that can replace crystalline silicon solar cells. [0003] The structure of perovskite solar cells has developed diversified, but no matter which structure is inseparable from the electron transport layer, the most mature and efficient electron transport layer material is mesoporous titanium dioxide, and its thin film preparation process is simple and clean. Pollution. [0004] The design and preparation of large-area perovskite solar cells is the prerequisite for realizing the industrialization of perovskite solar cells. However, the simple mesh structure, low mesh and low-cost screens are limited by the aperture ratio and wire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/46
CPCH10K71/00H10K2102/00Y02P70/50
Inventor 韩宏伟
Owner HUBEI WONDER SOLAR LLC
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