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Linear organic hole transport material and preparation and application thereof

A hole transport material, organic technology, applied in the field of solar cells, to achieve excellent photothermal stability, improve efficiency, and good dissolution and film-forming properties

Active Publication Date: 2019-01-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made in the research of hole transport materials, there is still a lot of room for improvement in terms of cost, stability and photoelectric conversion efficiency.

Method used

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  • Linear organic hole transport material and preparation and application thereof
  • Linear organic hole transport material and preparation and application thereof
  • Linear organic hole transport material and preparation and application thereof

Examples

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preparation example Construction

[0049] The preparation method of above-mentioned linear organic hole transport material, its reaction formula is as follows:

[0050]

[0051]Compound I used in the present invention is based on literature Han, J.; Zheng, X.; Wang, Y.; Hu, L.Guo, C.; Wang, Y.; Li, Y.; Ma, D.; Qiao, W. ; Wang, Z.J.Mater.Chem.C, 2017, 5, 159-165 was prepared and synthesized; compound Ⅲ was synthesized according to literature Wang, Z.; Liang, M.; Tan, Y.; Ouyang, L.; Sun, Z.; Xue.S.J. Mater.Chem.A 2015,3,4865–4874; Compound VI was prepared according to literature Rakstys, K.; Abate, A.; IbrahimDar, M.; Gao, P.; Jankauskas, V.; Jacopin, G.; Kamarauskas , E.; Kazim, S.; Ahmad, S.; Prepared by M.; Nazeeruddi, M.K.J.Am.Chem.Soc.2015, 137, 16172-16178; other reagents were purchased.

Embodiment 1

[0053] A linear organic hole-transporting material has a chemical structural formula of the following formula (VII):

[0054]

[0055] The preparation method of above-mentioned linear organic hole transport material, its reaction formula is as follows:

[0056]

[0057] The above-mentioned linear organic hole transport material is prepared by the following steps:

[0058] Step 1, preparing compound I, compound III and compound VI, compound I according to literature Han, J.; Zheng, X.; Wang, Y.; Hu, L.Guo, C.; Wang, Y.; Li, Y. ; Ma, D.; Qiao, W.; Wang, Z.J.Mater.Chem.C, 2017, 5, 159-165 Preparation and synthesis; Compound Ⅲ according to literature Wang, Z.; Liang, M.; Tan, Y.; Ouyang, L .; Sun, Z.; Xue.S.J.Mater.Chem.A 2015,3, 4865–4874 prepared; compound Ⅵ according to literature Rakstys, K.; Abate, A.; IbrahimDar, M.; Gao, P.; Jankauskas , V.; Jacopim, G.; Kamarauskas, E.; Kazim, S.; Ahmad, S.; Prepared by M.; Nazeeruddi, M.K.J. Am. Chem. Soc. 2015, 137, 16172-16178...

Embodiment 2

[0069] A linear organic hole transport material, the difference from Example 1 is that step 2 is: under the conditions of argon protection and ice bath, add 20mL of anhydrous tetrahydrofuran to the reaction bottle as a solvent, add 2.19g of compound I and mix uniform, then 2mol / L lithium diisopropylamide solution was added dropwise to the reaction system; after the dropwise addition, the reaction solution continued to react for 1 h under ice bath; anhydrous copper chloride was added to the reaction system, the The ratio of compound I, lithium diisopropylamide and anhydrous copper chloride is 1:1.1:1.1. After keeping the reaction in ice bath for 1 hour, the reaction solution is slowly warmed up to room temperature for 8 hours; Quenched with ice water, extracted with ethyl acetate, dried over anhydrous magnesium sulfate, and evaporated under reduced pressure to remove the solvent; the crude product was purified by column chromatography (eluent: petroleum ether / dichloromethane=15 / ...

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Abstract

the invention discloses a linear organic hole transport material as well as a preparation method and application thereof. According to the linear organic hole transport material, a rigid coplanar thiophene fused heterocycle serves as a parent core, the linear planar molecular structure can effectively improve the hole mobility and the conductivity, and the material has good dissolving film-formingperformance and excellent photo-thermal stability. The preparation method for the linear organic hole transport material has the advantages that the synthetic route is simple, the raw materials are easily available, the cost is low, when the prepared hole transport material is applied to a perovskite solar cell, the short-circuit light current density of a battery device reaches 22.31 mA cm<-2>,the open-circuit voltage is 1.094 V, the filling factor is 0.756, the photoelectric conversion efficiency reaches 18.45%, and therefore the efficiency of the perovskite solar cell is improved, and a wide application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a linear organic hole transport material and its preparation and application. Background technique [0002] As a new generation of photovoltaic technology, perovskite solar cells (PSCs for short) have the advantages of easy modulation of materials, high efficiency, simple preparation process, and low cost. As an important part of PSCs, the hole transport layer is mainly used to collect and transport the holes injected by the perovskite absorber layer to realize the effective separation of electrons and holes, which has an important impact on the battery efficiency. Hole transport materials are mainly divided into two categories: organic hole transport materials and inorganic hole transport materials. The selection range of inorganic hole transport materials is narrow, and the photoelectric conversion efficiency of the corresponding devices is relatively low; while the organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D495/22H01L51/46H01L51/42
CPCC07D495/22H10K85/631H10K85/657H10K30/10Y02E10/549
Inventor 王志辉严苏豪缪力海汪加蔚郭涛陈静
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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