Method for improving open-circuit voltage of organic-inorganic hybrid perovskite solar cell

A solar cell, open circuit voltage technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of lack of passivation effect on defects, and achieve the effect of improving photoelectric conversion efficiency, good uniformity and low roughness

Active Publication Date: 2021-04-09
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of polymer usually has a single functional group and can only passivate a single type of defect, while there are many types of defects in perovskite films, which often have different electrical properties. For example, iodine vacancy defects are positive, while lead vacancy defects are negative. Is negatively charged, polymers containing only a single functional group lack passivation effect on many types of defects

Method used

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  • Method for improving open-circuit voltage of organic-inorganic hybrid perovskite solar cell
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  • Method for improving open-circuit voltage of organic-inorganic hybrid perovskite solar cell

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Experimental program
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Effect test

Embodiment 1

[0049]First synthesis of acrylonitrile and PAN-P-CLS), specific route maps such as chloroprene copolymerfigure 1 Indicated. The specific synthesis steps are as follows:

[0050]Under nitrogen protection, acrylonitrile (AN, 6.3 mmol), chloroprene (Aa, 2.1 mmol), azo diisobutyronitrile (AIBN, 10 mg), DMF (10 ml) were added to the pressure resistant bottle; The pressure bottle is placed in an oil bath, and the reaction is 24 h. After the reaction, the polymerization solution was added dropwise into 50 mL of acetone to give a white acrylonitrile and a PAN-P-P-CLS of the chloroprene copolymer.

[0051]Next, 200 cycles are deposited on the clean FTO glass using atomic layer deposition equipment.2, Add the deposited FTO glass to heat treatment at 500 ° C for 30 min to get a dense TiO2film. Spin coating on a dense film SNO2Precursor solution (SNCL4Aqueous solution), spin coating conditions were 3000 rpm, 30s, and then further 180 ° C heating for 30 min, resulting in a dense TiO2 / SNO2Electronic t...

Embodiment 2

[0056]First, methyl acrylate and acrylamide copolymer (PMA-AA), specific route diagram, such asFigure 4 Indicated. The specific synthesis steps are as follows:

[0057]Under nitrogen protection, methyl acrylate (MA, 4.2 mmol), acrylamide (Aa, 0.42 mmol), azoiso (AIBN, 10 mg), DMF (10 mL) were added to the pressure resistant bottle; The bottle is placed in a 70 ° C oil bath, and the reaction is 24h. After completion of the reaction, the polymerization solution was dripped into 50 ml of diethyl ether to give a copolymer solid (PMA-AA) of methyl acrylate and acrylamide.

[0058]Second, in the FTO substrate, TiO is prepared2 / SNO2The electron transport layer, the method is as above. Configure the percent-titanium mine solution, according to the Moore percentage (1: 0.97: 0.03) will put PBI2: FAI: MABR is dissolved in DMSO: DMF = 4: 1 (volume ratio), in the formulated solution PBI2The total concentration of FAI and MABR is 50% of the solution, and the solution is divided into two parts, then t...

Embodiment 3

[0061]First synthesis of maleimide and allyl chloride copolymer (PMI-ACL), specific road maps such asFigure 9 Indicated. The specific synthesis steps are as follows:

[0062]Under nitrogen protection, maleimide (Mi, 2.1 mmol), allyl chloride (ACl, 2.1 mmol), azo diisobutyronitrile (AIBN, 10 mg), DMF (10 ml) were added to the pressure resistant bottle The pressure-resistant bottle was placed in a 70 ° C oil bath and the reaction was 24 h. After the reaction, the polymerization solution was dripped into 50 ml of chloroform to obtain a maleimide and an allyl chloride copolymer solid (PMI-ACL).

[0063]Second, in the FTO substrate, TiO is prepared2 / SNO2The electron transport layer, the method is as above. Configure the percent-titanium mine solution, according to the Moore percentage (1: 0.9: 0.07: 0.03) will put PBI2: FAI: CSI: MABR dissolved in DMSO: DMF = 4: 1 (volume ratio) solution, PBI in formulated solution2, FAI, CSI and MABR total concentrations of 50%, fully dissolved, spin coated ...

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Abstract

The invention belongs to a method for improving material performance, and particularly relates to a method for improving an open-circuit voltage of an organic-inorganic hybrid perovskite solar cell. The method comprises the following steps of adding a bifunctional polymer into the organic-inorganic hybrid perovskite precursor; or forming a thin layer containing a bifunctional polymer on the surface of a formed organic-inorganic hybrid perovskite thin film, wherein the bifunctional polymer is the bifunctional polymer of which the side chain contains groups capable of passivating positive electricity defects and negative electricity defects at the same time. By introducing the bifunctional polymer into the perovskite thin film, positive electricity and negative electricity grain boundary defects in the perovskite polycrystalline thin film can be effectively passivated at the same time, a deep energy level defect concentration is reduced, a carrier recombination probability is decreased, and the open-circuit voltage of a perovskite solar cell device is improved. And adopted materials are low in cost and easy to realize in process.

Description

Technical field[0001]The present invention is a method of improving material properties, and a method of improving an open circuit voltage of an organic-inorganic hybrid calcium titanium mine solar cell.Background technique[0002]As a new generation of photovoltaic devices in recent years, the perovskite solar cell has been received by researchers in related fields in recent years. Organic-inorganic hybrid calcurium titanium material as a suction layer of the perovskite solar cell, has a long-carrying length, a small width, excellent absorption coefficient, and is currently more than 25% of the photoelectric conversion efficiency. . The perovskite material can obtain a polycrystalline film using a solution treatment process, which does not require a harsh preparation conditions, but this also causes the grain boundary defect problem that is not overlighteous in the polycrystalline film. How to control the grain boundary defect in the film is one of the key factors in the efficiency a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K30/15H10K30/151H10K30/10H10K30/88Y02E10/549
Inventor 崔光磊王啸逄淑平陈晨
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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