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A kind of asymmetric hole transport material and its preparation method and application

A hole-transport material and asymmetric technology, applied in the field of solar cells, can solve the problems of high synthesis and preparation costs, poor stability of perovskite solar cells, and restrictions on wide-ranging applications, so as to improve the performance of dissolution and film formation, and suppress interface loading. Effects of flow particle recombination and molecular symmetry reduction

Active Publication Date: 2022-05-27
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of synthesis and preparation of Spiro-OMeTAD molecules is high, and the stability of perovskite solar cells prepared from them is poor, which limits their commercialization and wide-ranging applications.

Method used

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  • A kind of asymmetric hole transport material and its preparation method and application
  • A kind of asymmetric hole transport material and its preparation method and application
  • A kind of asymmetric hole transport material and its preparation method and application

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Experimental program
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Embodiment 2

[0039] This embodiment is roughly the same as Embodiment 1, and the main differences are:

[0040] Synthesis of compound of formula (3):

[0041] Under argon protection, into a 50 mL three-necked round-bottomed flask, the compound of formula (1) (2 mmol, 932 mg), the compound of formula (2) (3 mmol, 1210 mg), and tetrakistriphenylphosphonium palladium ( 0.1 mmol, 116 mg) and 15 mL of toluene; the mixture was stirred and heated to 110 °C for 12 h, cooled to room temperature, added with water and dichloromethane for extraction, the organic phase was washed three times with water, dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure; The crude product was purified by column chromatography (eluent: petroleum ether / dichloromethane=25 / 1~1 / 1) to obtain 1.25 g of the compound of formula (3) as a dark yellow solid with a yield of 79%.

[0042] Synthesis of compound of formula (4):

[0043] Under argon protection, into a dry Schlenk tube, th...

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Abstract

The invention discloses an asymmetric hole transport material and its preparation method and application. The material uses tetrathienopyrrole as the molecular core, and two sides are respectively composed of methoxytriphenylamine, indeno[1,2- b ] carbazole is the peripheral modification group, and the hole transport material of the present invention can effectively coordinate the advantages of the peripheral modification groups on both sides, utilizing indeno[1,2- b ]Carbazole’s rigid and planar spatial configuration enhances the intermolecular interaction of hole transport materials, improves electrical conductivity and hole mobility, and uses methoxytriphenylamine’s three-dimensional twisted spatial structure to suppress interface carrier recombination; in addition, The reduction of molecular symmetry can also effectively improve the dissolution and film-forming performance of the material, which is conducive to obtaining high-quality amorphous films. The asymmetric hole transport material of the present invention is applied to perovskite solar cells, and the short-circuit photocurrent density of the cell device reaches 22.98 mA cm ‑2 , the open circuit voltage is 1.099 V, the fill factor is 0.7923, and the photoelectric conversion efficiency is as high as 20.01%, showing broad commercial application prospects.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an asymmetric hole transport material and its preparation and application. Background technique [0002] As a new generation of photovoltaic technology, perovskite solar cells (PSCs) have the advantages of simple preparation process, easy modulation of materials, and low cost. The latest certified efficiency has reached 25.2% (National Renewable Energy Laboratory, NREL, 2019). As an important component of PSCs, the hole transport layer plays an important role in collecting the photogenerated holes from the perovskite absorber layer and transporting them to the counter electrode, and at the same time, it also effectively inhibits the electron recombination at the device interface, which has a great impact on the cell efficiency and stability. to a crucial impact. At present, the most widely used and efficient hole transport material in perovskite solar cells is 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D495/22H01L51/46H01L51/42
CPCC07D495/22H10K85/631H10K85/657H10K30/00H10K85/6572Y02E10/549
Inventor 王志辉罗忆梦曹绍菊包小春李进许晨红蒋金龙
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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