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Method for improving performance of light absorption layer of perovskite solar cell

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problem of low efficiency of perovskite solar cells, and achieve the effects of improving cell efficiency, saving production costs, and simplifying the preparation process

Active Publication Date: 2014-07-30
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the efficiency of the perovskite solar cell prepared by the low-temperature solution method is not high, the present invention proposes a method for improving the performance of the light-absorbing layer of the perovskite solar cell. By adding suitable additives, the prepared perovskite solar cell is greatly improved. battery efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The molar ratio of CH is 1:1 3 NH 3 I and PbI 2 Mix and dissolve in DMF to obtain a solution with a concentration of 15 wt %, heat and stir at 60° C. for 5 h, the reactants are completely dissolved, and a yellow solution is obtained. After the solution was cooled to room temperature, a certain mass of CH was added. 3 NH 3 The concentration of F additive in the solution was 10 mg / mL, and the solution was stirred for 1 h to obtain a perovskite precursor solution. The PEDOT:PSS solution was spin-coated on the surface of the ITO glass at 3000 rpm, heated at 150 °C for 10 min in air, and the perovskite precursor solution was spin-coated on the PEDOT:PSS film at 3000 rpm in a glove box, and heated at 100 °C for 40 s , get 130nm brown-black CH 3 NH 3 PbI 3 film.

[0039] Put the above CH 3 NH 3 PbI 3 The films were further assembled into cells to test their optoelectronic properties. put the PC 61 BM was dissolved in chlorobenzene to form a 20 mg / mL solution and s...

Embodiment 2

[0041] The molar ratio of CH was 1.1:1 3 NH 3 I and PbI 2 Mix and dissolve in DMF to obtain a solution with a concentration of 17 wt %, heat and stir at 70° C. for 3 h, the reactants are completely dissolved, and a yellow solution is obtained. After the solution was cooled to room temperature, a certain mass of CH was added. 3 CH 2 NH 3 The concentration of Cl additive in the solution was 19 mg / mL, and the solution was stirred for 1 h to obtain a perovskite precursor solution. The PEDOT:PSS solution was spin-coated on the surface of the ITO glass at 3000 rpm, heated at 150 °C for 10 min in air, and the perovskite precursor solution was spin-coated on the PEDOT:PSS film at 3000 rpm in a glove box, and heated at 100 °C for 30 s , get 140nm brown-black CH 3 NH 3 PbI 3 film.

[0042] Put the above CH 3 NH 3 PbI 3 The films were further assembled into cells to test their optoelectronic properties. put the PC 61 BM was dissolved in chlorobenzene to form a 20 mg / mL solu...

Embodiment 3

[0044] The molar ratio of CH was 1.2:1 3 NH 3 Br and PbI 2 Mix and dissolve in DMF to obtain a solution with a concentration of 20wt%, heat and stir at 50°C for 10h, the reactants are completely dissolved, and a yellow solution is obtained. After the solution was cooled to room temperature, a certain mass of NH was added. 4 The concentration of Br in the solution was 12 mg / mL, and the solution was stirred for 1 h to obtain a perovskite precursor solution. The PEDOT:PSS solution was spin-coated on the ITO glass surface at 3000 rpm, heated at 150 °C for 10 min in air, and the perovskite precursor solution was spin-coated on the PEDOT:PSS film at 4000 rpm in a glove box, and heated at 110 °C for 20 s , get 145nm brown-black CH 3 NH 3 PbI 2 Br thin film.

[0045] Put the above CH 3 NH 3 PbI 2 The Br thin films were further assembled into cells to test their optoelectronic properties. put the PC 61 BM was dissolved in chlorobenzene to form a 20 mg / mL solution and spin-c...

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Abstract

The invention relates to a method for improving the performance of a light absorption layer of a perovskite solar cell. The method includes the steps that an additive is added into a reactant of perovskite to form a perovskite precursor solution; then a base coated with an electron transport material or a hole transport material is coated with the precursor solution in a rotating mode, and a perovskite light absorption layer film is formed after thermal treatment. The additive comprises one or more of CnH2n+1NH3B and an AB compound, wherein n is equal to 0-3, A is selected from monovalent metal, and B is F or C1 or Br or I. The light absorption layer, prepared through the method, of the perovskite solar cell enables the battery efficiency to be increased to over 10 percent from less than 6 percent. The method is simple and effective, simplifies the preparation process, and can save production cost. Therefore, the method for improving the performance of the light absorption layer of the perovskite solar cell has extremely high industrial application value.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for improving the performance of a light absorption layer of a perovskite solar cell, thereby improving energy conversion efficiency. Background technique [0002] In recent years, the increasingly depleted fossil energy has become less and less able to meet the rapidly increasing energy demand of mankind, and the use of fossil energy has brought more and more serious environmental problems. Finding new alternative energy sources is an urgent problem for mankind. Research on new energy sources such as solar energy, wind energy, geothermal energy, and tidal energy has attracted more and more attention. Solar energy has the characteristics of inexhaustible, widely distributed and clean, and has great advantages over other energy sources. [0003] After more than 60 years of development, there are many different types of solar cells. It mainly includes monocrystalline / polycrys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0256H01L31/18
CPCH10K71/12H10K85/10H10K30/00Y02E10/549Y02P70/50
Inventor 左传天丁黎明
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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