Precursor solution and method for preparing same, preparation of solar cell electron transport layer, and solar cell

An electron transport layer and solar cell technology, applied in the field of solar cells, can solve the problems of increasing the production cost of cells and unfavorable development of flexible cells, etc.

Active Publication Date: 2018-08-24
TSINGHUA UNIV
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  • Claims
  • Application Information

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Problems solved by technology

But this mesoporous TiO 2 The structure needs to be sintered at a high temperature above 450°C, which not only incre

Method used

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  • Precursor solution and method for preparing same, preparation of solar cell electron transport layer, and solar cell
  • Precursor solution and method for preparing same, preparation of solar cell electron transport layer, and solar cell
  • Precursor solution and method for preparing same, preparation of solar cell electron transport layer, and solar cell

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preparation example Construction

[0039] see figure 1 , an embodiment of the present invention provides a method for preparing a precursor solution for preparing an electron transport layer of a solar cell, comprising:

[0040] S100, adding tin chloride to an organic solvent to form a mixed solution;

[0041] S200, heating, evaporating and condensing the mixed solution to reflux, so that the mixed solution forms a tin dioxide sol; and

[0042] S300, adding an alkaline additive to the mixed solution containing the tin dioxide sol to increase the particle size of the tin dioxide sol, thereby obtaining a precursor solution.

[0043] The preparation method of the precursor solution for preparing the electron transport layer of the solar cell provided by the embodiment of the present invention adopts the combination of reflux and alkaline additive control, firstly makes the mixed solution form a sol by reflux, and then adds the alkaline additive, Increase the particle size to obtain the required precursor solutio...

Embodiment 1

[0069] Example 1 Rigid micro-nano structure SnO 2 Fabrication of perovskite-based solar cells

[0070] Preparation of the electrode plate 110: partially etch the transparent conductive FTO glass with Zn powder and HCl, and partially protect it. After the etching is completed, it is cleaned with deionized water, ethanol, acetone, and isopropanol in sequence, and then dried for use.

[0071] Preparation of precursor solution: SnCl 2 ·H 2 O is dissolved in absolute ethanol to form a mixed solution, and the SnCl in the mixed solution 2 The molar concentration is 0.1mol L -1 ; Condensate and reflux at 80°C for 3h, then stand still at 40°C for 3h to form a SnO 2 Solution of sol; add alkaline additive NH 3 ·H 2 O, stir evenly to obtain the precursor solution, the alkaline additive NH in the precursor solution 3 ·H 2 The molar content of O is 0.01mol L -1 .

[0072] Prepare the electron transport layer 120: drop the precursor solution on the FTO conductive glass substrate, s...

Embodiment 2

[0077] Example 2 Flexible micro-nano structure SnO 2 Fabrication of perovskite-based solar cells

[0078] The preparation method is basically the same as that of Example 1, except that the flexible ITO / PEN conductive substrate is selected as the electrode plate 100 .

[0079] The battery is AM1.5, 100mW / cm 2 Test the J-V performance curve of the battery with a Keithley 24 million multimeter under light. see image 3 According to the curve of Example 2, the short-circuit current density of the battery is 21.19mA / cm 2 , the open circuit voltage is 1.14V, the fill factor is 0.68, and the photoelectric conversion efficiency is 16.42%.

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Abstract

The embodiment of the invention provides a method for preparing a precursor solution for preparing a solar cell electron transport layer. The method comprises adding tin chloride to an organic solventto form a mixed solution; performing heating evaporation and reflux condensation on the mixed solution to form tin dioxide sol from the mixed solution; and adding an alkaline additive to the mixed solution having the tin dioxide sol to increase the particle size of the tin dioxide sol, thereby obtaining the precursor solution. There is also provided a precursor solution for preparing a solar cellelectron transport layer. The precursor solution comprises an organic solvent, tin dioxide sol, and an alkaline additive, wherein the tin dioxide sol and the alkaline additive are dispersed in the organic solvent. A method of preparing a solar cell electron transport layer and a solar cell including the electron transport layer are also provided.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a precursor solution and a preparation method thereof, the preparation of an electron transport layer of a solar cell and the solar cell. Background technique [0002] Tin dioxide (Tin dioxide, SnO 2 ) is a wide bandgap semiconductor (3.8eV), which is not easy to be excited under ultraviolet conditions, and has high conductivity, easy preparation, stable chemical properties, and is widely used in solar cells, transparent conduction, gas sensing and other fields . [0003] Since thin films with excellent photoelectric properties can be obtained at low temperatures, SnO 2 In recent years, it has received extensive attention in the field of solar cells, especially perovskite solar cells. [0004] At present, the highest performance is TiO with mesoporous structure. 2 Perovskite solar cells with electron transport layer, this structure is due to the mesoporous TiO 2 The laye...

Claims

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Application Information

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IPC IPC(8): H01L51/48H01L51/42H01L51/46B82Y30/00
CPCB82Y30/00H10K71/00H10K71/12H10K30/35H10K2102/00Y02E10/549
Inventor 董庆顺史彦涛王立铎
Owner TSINGHUA UNIV
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