Undoped organic small molecule hole transport material, perovskite solar cell and preparation method and application thereof

A technology of solar cells and hole transport layers, applied in organic chemistry, circuits, photovoltaic power generation, etc., can solve the problems of affecting the photoelectric conversion efficiency of devices, poor film forming ability, and limiting the open circuit voltage of devices, so as to promote large-scale commercialization Production, avoiding unstable factors, improving the effect of stability

Active Publication Date: 2022-07-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although commonly used conductive polymers for hole transport materials such as: PEDOT:PSS have the advantages of good transmittance and hole mobility, etc., but PEDOT:PSS itself is weakly acidic, which may cause substrate corrosion, and it contains PSS pro- The water unit has strong hygroscopicity. As a hole transport material, it will seriously affect the performance of the device. The potential energy loss at the interface between PEDOT:PSS and the perovskite layer also limits the open circuit voltage of the device, thereby affecting the photoelectric conversion efficiency of the device.
Although the inorganic P-type semiconductor has strong hydrophobicity and high stability in the inverted structure, it has great selectivity to solvents and poor film-forming ability.
The most used organic small molecule hole transport materials such as PTAA and Spiro-OMeTAD have high photoelectric conversion efficiency (PCE), but in the process of preparing the hole transport layer, it is often necessary to improve the conductivity and Hole mobility, additive treatment will degrade the hole transport material and destroy the stability of the device. In addition, this kind of organic small molecule hole transport material also has the disadvantages of high price and low yield

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  • Undoped organic small molecule hole transport material, perovskite solar cell and preparation method and application thereof
  • Undoped organic small molecule hole transport material, perovskite solar cell and preparation method and application thereof
  • Undoped organic small molecule hole transport material, perovskite solar cell and preparation method and application thereof

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preparation example Construction

[0070] The present invention also provides a preparation method of the perovskite solar cell 10, comprising the following steps:

[0071] On the first electrode 11, an electron transport layer 12, a perovskite light absorption layer 13, a hole transport layer 14 and a second electrode 15 are formed in this order.

[0072] Preparation of the first electrode 11 : the transparent oxide semiconductor is washed with an inorganic solvent and a first organic solvent respectively, dried, and then subjected to ultraviolet ozone treatment to obtain the substrate of the first electrode 11 .

[0073] The above-mentioned inorganic solvent is deionized water, and the first organic solvent is selected from at least one of acetone, ethanol and isopropanol. Specifically, the first organic solvent is ethanol, and the cleaning effect is better.

[0074] Further, in order to achieve a better cleaning effect, the transparent oxide semiconductor can also be cleaned with detergent before cleaning with...

Embodiment 1

[0089] This embodiment provides an undoped organic small molecule hole transport material shown in formula II, and the specific preparation process is as follows:

[0090] Step S1: in a nitrogen atmosphere, put 0.15g of 0.276g and 20 mg of Pd (PPh 3 ) 4 It was put into a three-necked flask, and then 25 mL of toluene was added to obtain a mixed solution.

[0091] Step S2: Heat the above mixed solution to 110°C, stir for 8 hours, pour the obtained mixture into water and extract with chloroform, and use anhydrous MgSO for the obtained organic layer 4 Drying gave crude product. The crude product was purified by silica gel chromatography, wherein the eluent of the silica gel column was chloroform and n-hexane in a volume ratio of 1:1 to obtain a red solid.

[0092] Step S3: Combine the above red solid with 0.5g of Trichloromethane and 4 mL of piperidine were added to dissolve, and then degassed with nitrogen 5 times to obtain a mixture.

[0093] Step S4: The above mixture...

Embodiment 2

[0095] This embodiment provides an undoped organic small molecule hole transport material as shown in formula III, and the specific preparation process is as follows:

[0096] Step S1: in a nitrogen atmosphere, put 0.15g of 0.276g and 20 mg of Pd (PPh 3 ) 4 It was put into a three-necked flask, and then 25 mL of toluene was added to obtain a mixed solution.

[0097] Step S2: heating the above mixed solution at 110°C, stirring for 8 hours, pouring the obtained mixture into water and extracting with chloroform, and using anhydrous MgSO for the obtained organic layer 4 Drying gave crude product. The crude product was purified by silica gel chromatography, wherein the eluent of the silica gel column was chloroform and n-hexane in a volume ratio of 1:1 to obtain a red solid.

[0098] Step S3: put 0.5 g of the above red solid Trichloromethane and 4 mL of piperidine were added to dissolve, and then degassed with nitrogen 5 times to obtain a mixture.

[0099] Step S4: The ab...

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Abstract

The invention discloses an undoped organic small molecule hole transport material, a perovskite solar cell and a preparation method and application thereof. The above-mentioned undoped organic small molecule hole transport material, as the material of the hole transport layer of the perovskite solar cell, is very beneficial to the extraction of holes in the light absorption layer of the perovskite, without the need for steps such as doping and oxidation, which improves the device performance. The stable, low-cost and high-quality thin film properties are expected to facilitate the large-scale commercial production of perovskite solar cells.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to a non-doped organic small molecule hole transport material, a perovskite solar cell and a preparation method and application thereof. Background technique [0002] Perovskite solar cells have excellent optoelectronic properties and have made rapid progress in the field of photovoltaic technology in just a few years. So far, the certified efficiency has reached 25.5%, which has reached the standard for commercial application and has become a replacement for conventional thin-film solar cells. The most promising candidate for batteries, but its stability severely inhibits its application. [0003] Perovskite materials and hole transport materials have a great influence on the stability of perovskite solar cells. Commonly used three-dimensional perovskite materials are extremely sensitive to humidity, temperature and light, especially water molecules will decompose the perovskite l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D495/04H01L51/46
CPCC07D495/04H10K85/655H10K85/6576Y02E10/549Y02P70/50
Inventor 葛子义陈霞刘畅葛金峰高静
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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