Perovskite solar cell light absorption layer

A technology for solar cells and light-absorbing layers, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problem of insufficient crystallinity of light-absorbing layers of perovskite solar cells, changes in electrical and optical properties of light-absorbing layers, and difficult material preparation processes Control and other issues, to achieve the effect of high photoelectric conversion efficiency, simple preparation method, and excellent electrical properties

Inactive Publication Date: 2017-08-25
EAST CHINA NORMAL UNIV
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AI Technical Summary

Problems solved by technology

[0003] The element ratio of the light-absorbing layer is the main factor that determines the performance of the material. The current preparation method of the light-absorbing layer has many components and complex structures. , Light performance has a large change
And the production process is cumbersome, and the preparation process of the material is not easy to control, the cost is high, and the energy consumption is large, such as multi-element co-evaporation method and vacuum deposition method
However, the crystallinity of the light-absorbing layer of perovskite solar cells fabricated by the traditional spin-coating process is insufficient, and the series resistance of the fabricated solar cells is too high
The morphology and crystal quality of the perovskite light absorbing layer and the good contact interface between the absorbing layer and the electron transport layer are the key to obtain high-performance perovskite solar cells. The existing preparation process of perovskite light absorbing layer is still To be improved and improved

Method used

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  • Perovskite solar cell light absorption layer
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  • Perovskite solar cell light absorption layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Terephthalic acid-containing (H 2 Light-absorbing layer of BDC) precursor solution

[0030] a) Clean the FTO glass substrate: ultrasonically clean with acetone, alcohol, and deionized water for 15 minutes respectively, and then blow dry with pure nitrogen;

[0031] b) Immerse the treated substrate in the prepared 0.2M TiCl 4 solution, airtightly placed in a drying oven at 70 °C and heated for 1 h, the substrate was washed with deionized water and ethanol, and then annealed at 100 °C for 1 h to obtain a dense layer;

[0032] c) P25 TiO acidified with acetic acid 2 Powder, ethanol solution containing 10% mass ratio of ethyl cellulose and terpineol are uniformly mixed and dispersed according to the mass ratio of 0.06:3:2; finally, three times the mass of ethanol is added to dilute to prepare a porous layer slurry;

[0033] d) Spin-coating a porous layer of TiO on a transparent conductive substrate prepared with a dense layer by spin-coating method 2 slurry and sintered t...

Embodiment 2

[0039] Preparation of Light Absorbing Layer Containing 2,6-Naphthalene Dicarboxylic Acid (2,6-NDC) Precursor Solution Based on Dense Titanium Dioxide

[0040] a) is the same as step a) of Example 1;

[0041] b) is the same as step b) of Example 1;

[0042] c) Add 0.159 g CH 3 NH 3 I, 0.461 g PbI 2 , 700 μL butyrolactone, 300 μL dimethyl sulfoxide and 10 mg 2,6-naphthalene dicarboxylic acid (2,6-NDC) were mixed to obtain a mixed solution, and the mixed solution was heated and stirred at 70°C for 12 hours, and configured as Perovskite material precursor solution;

[0043] d) On the dense layer obtained in step b), the perovskite material precursor solution of step c) is spin-coated at 4000r / min, and dried at 120°C for 6 minutes to obtain 2,6-naphthalene dicarboxylic acid (2,6- NDC) light-absorbing layer of the precursor solution.

Embodiment 3

[0045] Preparation of light-absorbing layer containing 4,4'-biphenyldicarboxylic acid (BPDC) precursor solution based on transparent conductive film FTO

[0046] a) is the same as step a) of Example 1;

[0047] b) 0.159 g CH 3 NH 3 I, 0.461 g PbI 2 , 700 μL butyrolactone, 300 μL dimethyl sulfoxide, and 5 mg 4,4′-biphenyldicarboxylic acid (BPDC) were mixed to obtain a mixed solution, which was heated and stirred at 70°C for 12 hours to form perovskite Mineral material precursor solution;

[0048] c) On the FTO layer of the transparent conductive film obtained in step a), spin-coat the perovskite material precursor solution in step b) at 4000r / min, and dry it at 120°C for 6 minutes to obtain 4,4′-biphenyl dicarboxylic acid (BPDC) light-absorbing layer of the precursor solution.

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Abstract

The invention discloses a perovskite solar cell light absorption layer, and the light absorption layer is a film which is obtained by the spinning coating of organic lead halide perovskite precursor solution with organic carboxylic acid on a proper substrate and the heating processing. The organic carboxylic acid is used for controlling the nucleating of organic lead halide perovskite and the growth of crystal, thereby improving the interface contact characteristics of a perovskite light absorption layer and an electron transmission layer. Through the coordination and electrostatic interaction between carboxyl and lead ions, the nucleating of the organic lead halide perovskite light absorption layer and the growth of crystal are controlled effectively, and the organic lead halide perovskite light absorption layer which is large in area, is smooth, is high in quality of crystalline state, is excellent in electrical performance and is stable is prepared, and good ohmic contact between the perovskite light absorption layer and the electron transmission layer is formed. The solar cell prepared in the invention can improve the efficiency and reduce the cost. The preparation technology is simple, and the repeatability is good. The batch production of the solar cell can be achieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a light-absorbing layer of a perovskite solar battery. Background technique [0002] Organolead halide perovskite solar cells are considered to be one of the most promising new solar cells to replace silicon solar cells due to their low cost and high efficiency. Perovskite materials have a wide spectral absorption range, good bipolar transport characteristics, extremely long carrier transport distances, and extremely low defect state density. Excitation, transport, separation and other processes, and the perovskite material has a better energy band width, has a very high extinction coefficient, and its light absorption capacity is more than 10 times higher than other organic dyes. The development of all-solid-state solar cells is very rapid. In 2006, Japanese scientist Miyasaka first reported that the efficiency of this type of battery was only 2%. By 2016, the efficiency of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K71/40H10K30/10Y02E10/549
Inventor 张晨曦黄素梅侯显陈晓红
Owner EAST CHINA NORMAL UNIV
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