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Efficient and stable all-inorganic perovskite battery and preparation method thereof

An inorganic calcium and titanium ore technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor light and heat stability, unstable light and heat of organic cations, and low efficiency

Active Publication Date: 2019-06-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of organic-inorganic hybrid perovskite cells has improved rapidly in recent years, but the organic cations in their structure are unstable when receiving light and heat, resulting in poor photothermal stability of organic-inorganic hybrid perovskite cells.
All-inorganic perovskite solar cells have excellent photothermal stability and are favored by researchers, but as a new development direction, there are problems of low efficiency and poor humidity stability.

Method used

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  • Efficient and stable all-inorganic perovskite battery and preparation method thereof
  • Efficient and stable all-inorganic perovskite battery and preparation method thereof
  • Efficient and stable all-inorganic perovskite battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of reactants

[0053] (1-1) Complex PbI 2 -DMSO preparation: 4.84g PbI 2 Dissolve in 15mL DMSO and heat to PbI at 60℃ 2 After completely dissolved, about 35 mL of toluene was slowly added to it, and a white precipitate appeared. After the precipitate was completely precipitated, the precipitate was filtered, placed at room temperature for 3 hours, and dried in vacuum at 60°C for 24 hours.

[0054] (1-2) Complex PbBr 2 -DMSO preparation: 3.85g PbBr 2 Dissolve in 15mL DMSO and heat to PbBr at 60℃ 2 Dissolve completely, then slowly add about 35mL of hot acetone to it, and a white precipitate appears. After the precipitate is completely precipitated, the precipitate is filtered, placed at room temperature for 3 hours and then dried in vacuum at 60°C for 24 hours.

[0055] (1-3) Refining CsI crystal grains: Dissolve 2.73g CsI in 15mL DMSO, slowly heat up until CsI is completely dissolved, then slowly add about 35mL isopropanol to it, and white precipitate appears. Wh...

Embodiment 2

[0068] In this example, the thickness of the gold electrode is 80 nm, and the concentration of the anti-solvent dropped is 0.25 mg / mL. The other steps are the same as in Example 1. In this example, the efficiency of the inorganic perovskite solar cell is 14.38%.

Embodiment 3

[0070] In this example, the thickness of the gold electrode is 90 nm, the concentration of the anti-solvent dropped is 1 mg / mL, and the other steps are the same as in Example 1. In this example, the efficiency of the inorganic perovskite solar cell is 14.58%.

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Abstract

The invention discloses an efficient and stable all-inorganic perovskite battery and a preparation method thereof. Compared with the existing perovskite battery, the battery has an interface modification layer between an absorption layer and a hole transport layer. In comparison with an unmodified CsPbI2Br light absorbing layer, the preparation method mainly adjusts the all-inorganic perovskite absorption layer preparation process, a well-prepared anti-solvent solution is dripped during a high-speed spin coating stage of absorption layer preparation, DPP-DTT polymer in the anti-solvent solution and CsPbI2Br in the perovskite absorption layer can be interlaced and composited, the DPP-DTT polymer can thus modify the CsPbI2Br light absorbing layer, and the surface of the light absorbing layeris dense, hydrophobic and has few defects; by controlling the addition time and the addition amount of the anti-solvent solution, the interface modification layer can be formed on the upper part of the light absorbing layer; and due to the characteristics, the battery prepared by the film is high in efficiency and is less affected by humidity during use and storage, the performance can thus be kept in a long time, and conditions are created for application in the market.

Description

【Technical Field】 [0001] The invention belongs to the field of thin film solar cells, and specifically relates to an efficient and stable all-inorganic perovskite battery and a preparation method thereof. 【Background technique】 [0002] With the development of society and economy, the shortage of resources and energy issues arouse people's discussion. As a new energy material, perovskite-type photovoltaic materials have attracted everyone's attention. The efficiency of organic-inorganic hybrid perovskite batteries has increased rapidly in recent years, but the organic cations of their structure are unstable in light and heat, resulting in poor light-heat stability of organic-inorganic hybrid perovskite batteries. All-inorganic perovskite solar cells have excellent light and thermal stability and are favored by researchers, but as a new development direction, there are problems of low efficiency and poor humidity stability. [Content of the invention] [0003] The purpose of the p...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCY02E10/549
Inventor 刘治科赵欢韩玉袁世豪杨少敏段晨阳刘生忠
Owner SHAANXI NORMAL UNIV
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