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Undoped small organic molecule hole transport material as well as preparation method and application thereof

A technology of hole transport materials and small molecules, which is applied in the field of non-doped organic small molecule hole transport materials and its preparation, and can solve the problems of poor stability and efficiency improvement of perovskite batteries

Pending Publication Date: 2022-07-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the present invention is that the existing hole transport materials have poor effect on improving the stability and efficiency of perovskite batteries

Method used

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  • Undoped small organic molecule hole transport material as well as preparation method and application thereof
  • Undoped small organic molecule hole transport material as well as preparation method and application thereof
  • Undoped small organic molecule hole transport material as well as preparation method and application thereof

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preparation example Construction

[0051] A method for preparing an undoped organic small molecule hole transport material according to another embodiment of the present invention includes the following steps:

[0052] Dissolve the first reactant, the second reactant and tetrakis (triphenylphosphine) palladium in a solvent, and react at 110-120 ° C for 8-10 h to obtain a crude product;

[0053] Dissolving the crude product, the third reactant, and piperidine in chloroform, and reacting at 60-80° C. for 10-12 hours to obtain an undoped organic small molecule hole transport material;

[0054] Wherein, the structural formula of the first reactant is:

[0055]

[0056] The structural formula of the second reactant is:

[0057]

[0058] The structural formula of the third reactant is:

[0059]

[0060] Specifically, combining figure 2 As shown, in step S1, the first reactant, the second reactant, tetrakis(triphenylphosphine) palladium and toluene are mixed, heated and stirred, and the first reactant and...

Embodiment 1

[0094] The purpose of this embodiment is to prepare an undoped organic small molecule hole transport material, which includes the following steps:

[0095] Step S1: mixing the first reactant, the second reactant, tetrakis(triphenylphosphine) palladium and toluene, heating and stirring to obtain a mixed solution, and extracting and drying the mixed solution to obtain a crude product; specifically including :

[0096] Step S11: In a nitrogen atmosphere, 500 mg of the first reactant, 1 g of the second reactant and the amount of the substance are 0.5% Pd (PPh 3 ) 4 put into a three-necked flask, add 25 mL of toluene, heat to 110° C. and stir for 8 hours to obtain a first mixed solution;

[0097] Step S12: pouring the first mixed solution obtained in step S11 into water, and extracting with dichloromethane to obtain the first organic layer;

[0098] Step S13: Use anhydrous MgSO for the first organic layer obtained in Step S12 4 Drying treatment was carried out to obtain a crude...

Embodiment 2

[0106] The purpose of this embodiment is to provide a perovskite solar cell that combines Figure 4 As shown, the perovskite solar cells described in this example are ZnO (SnO) from top to bottom 2 )-CsPbI 2 Br-G7 material-Spiro-OMeTAD-MoO 3 Layered structure.

[0107] The preparation of perovskite solar cells specifically includes the following steps:

[0108] Step S1: preparing a first electrode, spin-coating a coating solution on the surface of the first electrode, and forming an electron transport layer after annealing, specifically including:

[0109] Step S11: Cut the ITO conductive glass into a size of 2 × 2 cm, use detergent, deionized water, acetone, and isopropanol respectively to ultrasonically clean for 20 minutes, put it in an oven to dry, and then treat it with ultraviolet ozone for 30 minutes to obtain the first step. an electrode;

[0110] Step S12: dissolving zinc acetate and ethanolamine in 10 mL of 2-methoxyethanol solution at a molar mass ratio of 1:1,...

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Abstract

The invention provides an undoped small organic molecule hole transport material as well as a preparation method and application thereof, and relates to the technical field of photoelectric materials. According to the undoped small organic molecule hole transport material, benzene ring substituted benzodithiophene is used as a central core, thiophene bithienosilole is used as a pi bridge, rhodanine is used as an end group, benzene rings are added on side chains of the central core, the conjugacy of molecules is improved, formation of an intermolecular pi-pi stacking structure is facilitated, and the hole transport efficiency is improved. Thienyl thienosilole contains a long C-Si bond, so that steric hindrance is reduced, intermolecular pi-pi accumulation is further promoted, and more ordered orientation is generated. The undoped small organic molecule hole transport material has relatively strong hole capability and relatively strong capability of absorbing light in a green light wavelength range, can remarkably improve the hole mobility, and can obtain relatively high photoelectric conversion efficiency and relatively strong stability when being applied to a perovskite solar cell.

Description

technical field [0001] The invention relates to the technical field of optoelectronic materials, in particular, to an undoped organic small molecule hole transport material and a preparation method and application thereof. Background technique [0002] Perovskite solar cells are solar cells that use perovskite-type organometallic halide semiconductors as light-absorbing materials. They belong to the third generation of solar cells, also known as new concept solar cells. Lower production costs have been rapidly developed, among them, with CsPbX 3 Structured all-inorganic perovskite solar cells have attracted much attention in the industry due to their excellent stability under high temperature and strong light. [0003] However, the phase transition problem of all-inorganic perovskites in high humidity has seriously hindered their development in the field of optoelectronics. Untreated perovskites cannot be exposed to air for a long time. Under high humidity conditions, water...

Claims

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Application Information

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IPC IPC(8): C07F7/08H01L51/46H01L51/48
CPCC07F7/0816C07F7/083H10K30/00Y02P70/50
Inventor 葛子义郑康辉刘畅陈振宇郁魁保赵梦雨
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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