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A laser processing method to increase the effective area of ​​perovskite solar cells

A laser processing method and solar cell technology, which is applied in the field of solar cells, can solve the problems that the effective area of ​​the battery cannot be further improved, and the tangent distance of the positioning accuracy is large, so as to achieve the effects of reducing the number of positioning times, improving efficiency, and reducing errors

Inactive Publication Date: 2019-11-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a limit to the adjustment of the laser spot size, and the positioning accuracy of the CCD coaxial monitoring system will also cause the distance between the tangent lines to be too large, resulting in that the effective area of ​​the battery cannot be further improved.

Method used

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  • A laser processing method to increase the effective area of ​​perovskite solar cells
  • A laser processing method to increase the effective area of ​​perovskite solar cells
  • A laser processing method to increase the effective area of ​​perovskite solar cells

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Embodiment 1

[0026] Such as image 3 Shown, adopt the ultrafast laser processing method of large-area perovskite solar cell module of the present invention, it comprises the steps:

[0027] (1) Cut the 5cm*5cm ITO conductive glass with an ultrafast laser, and peel off the transparent conductive layer in some areas; the processing parameters are: picosecond mode, the repetition frequency is 200k Hz, the laser power is 15W, and the scanning speed of the galvanometer is 1000mm / s, the etching line width is 30μm; clean the substrate after cutting;

[0028] (2) Scrape-coating a layer of tin oxide electron transport layer by Slot-die on the cleaned substrate;

[0029] (3) spin-coating perovskite and spiro-OMeTAD on the tin oxide electron transport layer;

[0030] (4) Evaporate gold (80nm) above the functional layer;

[0031] (5) Use the ultrafast laser to process the above device, and cut two lines at the same time: tangent processing close to the TCL tangent (that is, cutting off part of the...

Embodiment 2

[0043] The method for processing large-area perovskite solar cell components by ultrafast laser of the present invention comprises the following steps:

[0044] (1) Cut the 6cm*6cm FTO conductive glass with an ultrafast laser, and peel off the transparent conductive layer in some areas. The processing parameters are: picosecond mode, the repetition frequency is 500k Hz, the laser power is 14W, and the scanning speed of the galvanometer is 900mm / s, the etching line width is 30 μm, and the substrate is cleaned after cutting;

[0045] (2) preparing a layer of tin oxide electron transport layer by chemical bath deposition on the cleaned substrate;

[0046] (3) spin-coating perovskite and spiro-OMeTAD on the tin oxide electron transport layer;

[0047] (4) Evaporate gold (80nm) above the functional layer;

[0048] (5) Use the ultrafast laser to process the above device, and cut two lines at the same time: tangent processing close to the TCL tangent (that is, cutting off part of ...

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Abstract

The invention belongs to the field of solar cells, in particular to a laser processing method for increasing the effective area of ​​perovskite solar cells. The preparation method includes: depositing a transparent conductive layer on a clean substrate, cutting the substrate with an ultrafast laser, and cutting off the transparent conductive layer in some areas; cleaning the substrate, and then depositing a battery functional layer and a metal counter electrode on the transparent conductive layer The battery functional layer is an electron transport layer, a perovskite light-absorbing layer, and a hole transport layer in sequence; two tangent lines are cut by using an ultrafast laser and using different laser processing parameters, and one of the tangent lines cuts off part of the battery functional layer at the same time and the metal counter electrode layer, and another tangent line cuts off part of the battery functional layer and at the same time makes the metal counter electrode layer extend down and overlap the transparent conductive layer to form a complete series battery structure.

Description

technical field [0001] The invention belongs to the field of solar cells, in particular to a laser processing method for increasing the effective area of ​​perovskite solar cells. Background technique [0002] With the continuous development of the global economy, the energy crisis and environmental pollution problems are becoming more and more serious. Solar energy, as a renewable clean energy, has received more and more attention. The development of high-efficiency and low-cost new solar cells will help to realize the wide application of solar photovoltaic power generation, and is also one of the effective means to improve the problems of global warming and greenhouse effect. At present, silicon solar cells occupy about 90% of the photovoltaic module market, but their cost is too high and their production consumes too much energy. Perovskite solar cells have attracted worldwide attention due to their advantages of high conversion efficiency, high open circuit voltage, lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/00H10K71/20H10K30/00Y02E10/549
Inventor 程一兵李天慧黄福志
Owner WUHAN UNIV OF TECH