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A kind of preparation method of spiro-ometad monoclinic crystal

A monoclinic crystal, crystallization technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problem of no growth and so on

Active Publication Date: 2021-11-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order for the crystal to obtain a higher hole mobility, the molecules must have better spatial symmetry, which is more conducive to promoting the high-speed transport of carriers. However, there are no other crystal system Spiro-OMeTAD single crystals grown at home and abroad. Related reports

Method used

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  • A kind of preparation method of spiro-ometad monoclinic crystal
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  • A kind of preparation method of spiro-ometad monoclinic crystal

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Embodiment 1

[0022] The present embodiment provides a kind of preparation method of Spiro-OMeTAD monoclinic crystal, comprises the following steps:

[0023] (1) Weigh 15mg of Spiro-OMeTAD powder drug, dissolve in 3mL of 1,2-dichloroethane solvent, and mix well;

[0024] (2) Filter the solution obtained in step (1) using a filter head with a pore size of 0.22 μm, and then stand in the sun for 1 hour until the solution changes from colorless to red;

[0025] (3) Put the red solution into a container containing 5mL of methanol solution, seal it and let it stand for 7 days to crystallize.

Embodiment 2

[0027] The present embodiment provides a kind of preparation method of Spiro-OMeTAD monoclinic crystal, comprises the following steps:

[0028] (1) Weigh 15mg of Spiro-OMeTAD powder drug, dissolve in 1mL 1,2-dichloroethane solvent, and mix well;

[0029] (2) Filter the solution obtained in step (1) using a filter head with a pore size of 0.22 μm, and then stand in the sun for 1 hour until the solution changes from colorless to red;

[0030] (3) Put the red solution into a container containing 3mL of methanol solution, seal it and let it stand for 7d to crystallize.

Embodiment 3

[0032] The present embodiment provides a kind of preparation method of Spiro-OMeTAD monoclinic crystal, comprises the following steps:

[0033] (1) Weigh 15mg of Spiro-OMeTAD powder drug, dissolve in 15mL 1,2-dichloroethane solvent, and mix well;

[0034] (2) Filter the solution obtained in step (1) using a filter head with a pore size of 0.22 μm, and then stand in the sun for 1 hour until the solution changes from colorless to red;

[0035] (3) Put the red solution into a container containing 50mL of methanol solution, seal it and let it stand for 7d to crystallize.

[0036] Use X-ray diffractometer to test the crystal structure that embodiment 1 prepares, as figure 1 As shown, the Spiro-OMeTAD single crystal prepared and grown by the present invention is a monoclinic crystal, and the unit cell parameters are: α=90°, β=112°, γ=90°; if figure 2 As shown, through the I-V test of the conductive atomic force microscope, the current response of the monoclinic crystal prepar...

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Abstract

The invention discloses a preparation method of Spiro-OMeTAD monoclinic crystals, comprising the following steps: selecting a special solvent, adopting an anti-solvent vapor phase diffusion assisted crystallization method to induce Spiro-OMeTAD crystallization, and under the action of the anti-solvent gradually volatilizing and diffusing, the solution Gradually saturated with precipitation of Spiro‑OMeTAD monoclinic crystals. The Spiro-OMeTAD monoclinic crystal prepared by the method provided by the present invention has higher spatial symmetry, and it is found through the conductivity test that it has better conductivity than the triclinic crystal.

Description

technical field [0001] The invention relates to the technical field of material crystallization, in particular to a preparation method of Spiro-OMeTAD monoclinic crystals. Background technique [0002] Spiro-OMeTAD (2,2',7,7'-tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene) is a Organic semiconductor materials, as hole-transporting layers, have important applications in dye-sensitized and perovskite solar cells. Spiro-OMeTAD has solution processability and good shape stability, and can form uniform and continuous thin films without being affected by grain boundaries, which greatly improves the performance and lifetime of perovskite solar cells. However, the hole mobility of Spiro-OMeTAD itself is extremely low, and high efficiency cannot be obtained when it is directly applied to devices, and doping is usually required to improve its conductivity. However, doping can accelerate the degradation of the perovskite layer and reduce the lifetime of the device. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B7/00
CPCC30B7/00C30B29/54
Inventor 王杰贺卿石东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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