Thin film solar cells and preparation methods thereof

A technology of solar cells and thin films, applied in the field of solar cells, can solve the problems of low energy conversion efficiency of solar cells and the like

Active Publication Date: 2019-05-03
WUXI UTMOST LIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, it is reported that its energy conversion efficiency can be higher than 20%, but the current energy conversion efficiency of so

Method used

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  • Thin film solar cells and preparation methods thereof
  • Thin film solar cells and preparation methods thereof
  • Thin film solar cells and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Test sample: Indium tin oxide (ITO) transparent electrodes with a thickness of 50 nm and 500 nm were respectively formed on the surface of a glass transparent substrate to obtain a test sample.

[0057] Test method: test the light absorption performance of the above test samples under the condition of AM1.5G, see the test results and AM1.5G spectral irradiance distribution Figure 9 .

[0058] Figure 9 The spectral irradiance distribution of AM1.5G and the absorption characteristics of the ITO transparent electrode are shown as a function of wavelength and thickness of the transparent electrode. Depend on Figure 9It can be seen that when the wavelength is less than 450nm, the light absorptivity increases significantly with the increase of the thickness of the transparent electrode, and the light absorptivity decreases sharply with the increase of the wavelength. When the wavelength increases further, the light absorptivity increases with the increase of the waveleng...

Embodiment 2

[0060] Test sample: The test sample is a plurality of solar cells, the solar cell includes a glass transparent substrate, an ITO transparent electrode, an electron transport layer (titanium dioxide), a perovskite light-absorbing layer, a hole transport layer (Spiro-OMeTAD) and The silver electrode and the ITO transparent electrode in multiple solar cells have different thicknesses, which are 0nm (ie, not including the ITO transparent electrode), 100nm, 200nm, 300nm, 400nm and 500nm.

[0061] Test method: For the above-mentioned multiple solar cells, the photogenerated current loss caused by the reflection of the transparent electrode layer with different thicknesses and the photogenerated current loss caused by the light absorption of the transparent electrode are simulated and calculated according to the conventional basic logic method in this field. The test results are shown in Figure 10 .

[0062] Figure 10 The test results of the photogenerated current loss due to the ...

Embodiment 3

[0064] Test sample: ITO transparent electrode (thickness: 500nm), electron transport layer (titanium dioxide, thickness: 40nm), perovskite light-absorbing layer (MAPbI) are sequentially formed on the glass transparent substrate 3 , thickness is 500nm), hole transport layer (Spiro-OMeTAD, thickness is 150nm), metal electrode (silver, thickness is 100nm), encapsulation layer (ethylene-vinyl acetate copolymer, EVA) and backplane (glass), get The test sample, wherein, the step of forming the ITO transparent electrode is: forming a transparent conductive layer on a transparent substrate; using a laser to form a plurality of grooves arranged at intervals on the transparent conductive layer to obtain a transparent electrode. A series of solar cells with different aperture ratios (groove area / total area of ​​transparent electrodes) and thicknesses of the transparent electrodes at the bottom of the grooves were prepared by using the above method.

[0065] Test method: For the above ser...

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Abstract

The invention provides thin film solar cells and preparation methods thereof. The thin film solar cell includes a transparent electrode, an electron transfer layer, a perovskite light absorbing layer,a hole transport layer, and a metal electrode which are sequentially are arranged in a laminated manner, wherein the transparent electrode is provided with multiple grooves disposed at intervals. Through arrangement of the grooves in the battery, light absorption of the transparent electrode can be inhibited, and at the same time, obvious resistive loss can not be produced, thereby being capableof improving the utilization rate of sunlight, and the energy conversion efficiency of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a thin-film solar cell and a preparation method thereof. Background technique [0002] At present, perovskite solar cells have attracted widespread attention as a new type of high-efficiency thin-film solar cell. Under low temperature conditions, flexible perovskite batteries can be prepared. In addition, it is reported that its energy conversion efficiency can be higher than 20%, but the energy conversion efficiency of solar cells is still low at present, how to further improve the energy conversion efficiency of solar cells is still the focus of research in the industry. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to propose a thin-film solar cell that can effectively reduce light loss without causing significant resi...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/48
CPCY02E10/549
Inventor 沈承焕
Owner WUXI UTMOST LIGHT TECH CO LTD
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