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Perovskite solar cell taking Mo-stannic oxide as electron transport layer and preparation method of perovskite solar cell

An electron transport layer and solar cell technology, applied in the field of solar cells, can solve the problems of poor conductivity, affecting the performance of perovskite solar cells, low electron mobility, etc., to improve crystallinity, increase carrier concentration and electron transport properties, effects that promote efficient extraction

Active Publication Date: 2020-09-15
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most existing perovskite solar cells are based on mesoporous TiO 2 and nano-SnO 2 For the electron transport layer, TiO 2 and SnO 2 Poor conductivity and low electron mobility seriously affect the performance of perovskite solar cells

Method used

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  • Perovskite solar cell taking Mo-stannic oxide as electron transport layer and preparation method of perovskite solar cell
  • Perovskite solar cell taking Mo-stannic oxide as electron transport layer and preparation method of perovskite solar cell
  • Perovskite solar cell taking Mo-stannic oxide as electron transport layer and preparation method of perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A Mo-SnO 2 As the preparation method of the perovskite solar cell of the electron transport layer, the process is as follows:

[0038] (1) Select the deposited ITO strip electrode and ordinary glass, and repeatedly wash with detergent to remove the oil on the surface of the glass; divide the two into regular small pieces, such as 1 cm × 1 cm, and ultrasonically in deionized water for 30 min , ultrasonication in acetone solution for 30 min, ultrasonication in isopropanol solution for 30 min; dry the obtained ITO electrode and ordinary glass sheet in an oven at 100°C for 30 min to obtain clean ITO electrode and ordinary glass sheet.

[0039] (2) Preparation of Mo-SnO 2 Electron transport layer: weigh 10 g Sn powder and 0.485 g MoO in sequence 3 powder (Mo relative to Sn mole percentage is 4 mol%), the above two raw materials were added to a double-necked round bottom flask, and 30 mL of deionized water was added with constant stirring (due to the Sn powder and MoO 3 Th...

Embodiment 2

[0047] For Mo-SnO 2 Water dispersion, gradually increase the mole percentage of Mo (the mole percentage of Mo relative to Sn is 0, 2, 4, 6, 8 mol%), after testing different Mo doping mole percentages Mo-SnO 2 Electronic conductivity, the specific results are shown in Table 1. Table 1 shows that Mo doping can significantly improve its electronic conductivity.

[0048] Table 1 Mo-SnO after introducing different mole percentages of Mo 2 Electronic conductivity

[0049]

[0050] The above Mo-SnO with different Mo doping amounts 2 Preparation of Mo-SnO with Different Doping Amounts from Aqueous Dispersion 2 The electron transport layer, (Mo is 0, 2, 4, 6, 8 mol% relative to the molar percentage of Sn in turn), the photoelectric conversion efficiency of the corresponding perovskite solar cell shows a trend of first increasing and then decreasing, and the others are the same as in Example 1; The photoelectric conversion efficiency of perovskite solar cells varies with Mo-SnO ...

Embodiment 3

[0052] For the introduced P123 copolymer, gradually increasing the concentration of the copolymer in the perovskite precursor solution (2.5 mg / mL, 5.0 mg / mL, 7.5 mg / mL, 10.0 mg / mL), the corresponding perovskite solar cell The photoelectric conversion efficiency also shows a trend of first increasing and then decreasing, and the others are the same as in Example 1. The change curve of photoelectric conversion efficiency of perovskite solar cells with the concentration of the introduced P123 copolymer is shown in Figure 5. Figure 5 It can be seen that the photoelectric conversion efficiency shows a trend of first increasing and then decreasing. Increasing the concentration of copolymer P123 can better passivate the grain boundary defects of perovskite, but when the concentration of copolymer P123 is too high, the formation of The passivation layer will be thicker, and due to the insulating properties of the copolymer P123, it will hinder the separation and transport of photogen...

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Abstract

The invention discloses a perovskite solar cell taking Mo-SnO2 as an electron transport layer and a preparation method of the perovskite solar cell. The preparation method of the solar cell comprisesthe steps of (1) depositing a Mo-SnO2 electron transport layer on a clean ITO electrode; (2) depositing an NH4Cl / KCl interface modification layer on the Mo-SnO2 electron transport layer; (3) introducing a P123 copolymer into a (FAMA)CsPbIBr system; (4) depositing a (FAMA)CsPbIBr photosensitive layer on the NH4Cl / KCl interface modification layer; (5) depositing a Spiro-OMeTAD hole transport layer on the photosensitive layer; and (6) evaporating an Au counter electrode on the Spiro-OMeTAD hole transport layer. The average photoelectric conversion efficiency of the prepared solar cell reaches 22.83%, the highest photoelectric conversion efficiency exceeds 22.97%, and the solar cell has good illumination stability.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a perovskite solar cell using Mo-tin dioxide as an electron transport layer and a preparation method thereof. Background technique [0002] Solar cells are an important technical basis for large-scale utilization of solar energy into electric energy. The development of solar cells is a "green" new technology that alleviates the contradiction between economic development, energy and the environment. Both have made remarkable progress and have occupied most of the application market. At present, the research of solar cells presents the following new directions: 1. Develop top or bottom cells that match crystalline silicon cells, and construct stacked cells with a theoretical efficiency exceeding 33%; 2. Develop new types of solar cells such as flexible, lightweight, and colorful Batteries, to achieve complementarity with crystalline silicon batteries, to meet the n...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/48H01L51/42B82Y40/00B82Y30/00B82Y10/00
CPCB82Y10/00B82Y40/00B82Y30/00H10K71/12H10K71/40H10K30/15H10K2102/102Y02E10/549
Inventor 刘向阳赵晓伟牛晨丁恒川
Owner HENAN UNIVERSITY
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