Composite light absorption layer solar cell and preparation method thereof

A technology of solar cells and light-absorbing layers, applied in the field of solar cells, can solve problems such as poor output performance of solar cells, low absorption efficiency, and limited light energy utilization rate, so as to enhance absorption utilization rate, improve battery performance, and facilitate current carrying The effect of the subtransfer

Active Publication Date: 2020-05-05
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But CsPbBr 3 The wide bandgap (2.3eV) of the perovskite material itself limits the utilization of light energy, basically does not absorb the band between 550nm and 800nm, and has low absorption efficiency for the band between 300nm and 550nm, and CsPbBr 3 The overall output performance of solar cells with perovskite materials as a single light-absorbing layer is still poor

Method used

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  • Composite light absorption layer solar cell and preparation method thereof
  • Composite light absorption layer solar cell and preparation method thereof
  • Composite light absorption layer solar cell and preparation method thereof

Examples

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Embodiment 1

[0041] A composite light-absorbing layer solar cell of the present invention, specifically CsPbBr 3 Perovskite / CsPbBr 3 Quantum dot composite light-absorbing layer solar cell, its structure is as follows figure 1 As shown, the solar cell with composite light-absorbing layer includes FTO conductive glass layer, TiO 2 Thin film layer, composite light-absorbing layer and carbon electrode layer, the composite light-absorbing layer is composed of CsPbBr arranged in sequence from bottom to top 3 Perovskite film layer and CsPbBr 3 Quantum dot film layer composition.

[0042] In this example, CsPbBr 3 The thickness of the quantum dot film layer is 50nm.

[0043] A preparation method of the composite light-absorbing layer solar cell of the above-mentioned present embodiment, comprising the following steps:

[0044] (1) Preparation of TiO 2 Film layer:

[0045] Use glass cleaner, acetone, isopropanol and absolute ethanol to ultrasonically clean the FTO conductive glass for 30 m...

Embodiment 2

[0068] A composite light-absorbing layer solar cell of the present invention has basically the same structure as the composite light-absorbing layer solar cell in Example 1, the only difference being: CsPbBr 3 The thickness of the quantum dot film layer is 30nm.

[0069] A preparation method of the composite light-absorbing layer solar cell of this embodiment is basically the same as that of Example 1, the only difference being that CsPbBr 3 The coating-drying times of the quantum dot precursor solution is 1 time.

[0070] The performance of the composite light-absorbing layer solar cell prepared in this example was tested, and the result was that the short-circuit current density was 5.49mA / cm 2 , Open circuit voltage 1.35V, fill factor 67.7%, conversion efficiency 5.03%.

Embodiment 3

[0072] A composite light-absorbing layer solar cell of the present invention is basically the same structure as the composite light-absorbing layer solar cell in Example 1, the only difference being: wherein, CsPbBr 3 The thickness of the quantum dot film layer is 70nm.

[0073] A preparation method of the composite light-absorbing layer solar cell of this embodiment is basically the same as that of Example 1, the only difference being that CsPbBr 3 The number of times of coating-drying of the quantum dot precursor solution is 3 times.

[0074] The performance of the composite light-absorbing layer solar cell prepared in this example was tested, and the result was that the short-circuit current density was 5.56mA / cm 2 , Open circuit voltage 1.33V, fill factor 69.8%, conversion efficiency 5.16%.

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Abstract

The invention discloses a composite light absorption layer solar cell and a preparation method thereof. The composite light absorption layer solar cell comprises a transparent conductive substrate, atransparent electron transport layer, a composite light absorption layer and a carbon electrode layer which are sequentially arranged from bottom to top, and the composite light absorption layer is composed of a CsPbBr3 perovskite thin film layer and a CsPbBr3 quantum dot thin film layer which are sequentially arranged from bottom to top. The preparation method comprises the step of sequentially preparing the transparent electron transport layer, the CsPbBr3 perovskite thin film layer, the CsPbBr3 quantum dot thin film layer and the carbon electrode layer on the transparent conductive substrate, wherein the CsPbBr3 quantum dot is prepared by taking Cs2C2O4 as a cesium source. According to the composite light absorption layer solar cell, the short-circuit current density, the open-circuit voltage, the filling factor and the photoelectric conversion efficiency are improved at the same time, so that the comprehensive performance of the cell is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and relates to a solar cell with a composite light-absorbing layer and a preparation method thereof, in particular to a CsPbBr 3 Perovskite / CsPbBr 3 A quantum dot composite light-absorbing layer solar cell and a preparation method thereof. Background technique [0002] In the past 10 years, perovskite solar cells have become a research hotspot in the scientific field all over the world. In just 10 years, the photoelectric conversion efficiency of organic / inorganic hybrid perovskite solar cells has increased from 3.8% to 25.2%. Its raw material sources are extensive and cheap, its preparation process is simple, and it can be prepared on a flexible substrate. It is currently the most promising emerging photovoltaic device. However. Organic / inorganic hybrid perovskite solar cells are extremely sensitive to temperature and humidity, and the stability of organic / inorganic hybrid perovskite sola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/032H01L31/0352H01L31/18
CPCH01L31/032H01L31/035218H01L31/18Y02P70/50
Inventor 陈建林黄才友彭卓寅陈荐何建军李微任延杰
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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