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One-dimensional organic-inorganic hybrid perovskite and preparation method thereof

A perovskite and organic technology, applied in the field of organic-inorganic hybrid perovskite and its preparation, can solve the lack of growth power of one-dimensional perovskite, affect the growth quality of perovskite, and hinder the application of perovskite-based optoelectronic devices And other issues

Pending Publication Date: 2022-05-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-dimensional perovskite prepared based on the substrate is not only difficult to transfer to other substrates but also has limited crystal quality, which hinders the further application of perovskite-based optoelectronic devices
In addition, since the substrate will introduce a large number of nucleation sites, the prepared one-dimensional perovskite lacks sufficient growth momentum, and it is difficult to achieve the growth of ultra-long one-dimensional perovskite.
In addition, the traditional substrate-based growth method is not easy to control the crystallization process of one-dimensional perovskite, which will seriously affect the growth quality of perovskite.

Method used

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  • One-dimensional organic-inorganic hybrid perovskite and preparation method thereof
  • One-dimensional organic-inorganic hybrid perovskite and preparation method thereof
  • One-dimensional organic-inorganic hybrid perovskite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] One-dimensional super long CH 3 NH 3 PbI 3 The synthesis methods and properties of perovskites are as follows:

[0045] (1) see image 3 , using an electronic balance to weigh the same molar amount of CH 3 NH 3 I and PbI 2 Put it into a pre-cleaned serum bottle, use a graduated cylinder to measure 80 mL of DMF organic solvent and add it to it. In the solution obtained at this time, CH 3 NH 3 I and PbI 2 The concentration is 2.2mol / L. A magnet was added to the bottle, and it was placed in a water bath at 80° C. under magnetic stirring for 1 hour to fully dissolve the precursor to form a yellow transparent solution. The perovskite solution was sealed and placed in an environment of 25 °C, one-dimensional CH 3 NH 3 PbI 3 • DMF perovskites will grow spontaneously.

[0046] (2) One-dimensional ultra-long CH prepared in Example 1 3 NH 3 PbI 3 DMF perovskites such as Figure 4 As shown, the microwire length reaches more than 6 cm.

[0047] (3) Pass Figure 5...

Embodiment 2

[0050] (1) see image 3 , using an electronic balance to weigh the same molar amount of CH 3 NH 3 I and PbI 2 Put it into a pre-cleaned serum bottle, use a graduated cylinder to measure 5 mL of DMF organic solvent and add it to it. In the solution obtained at this time, CH 3 NH 3 I and PbI 2 The concentration was controlled at 3.1mol / L. A magnet was added to the bottle, and it was placed in a water bath at 80° C. under magnetic stirring for 1 hour to gradually dissolve the precursor. The perovskite solution was sealed and placed in an environment of 25 °C, one-dimensional CH 3 NH 3 PbI 3 • DMF perovskites will grow spontaneously.

[0051] (2) One-dimensional CH prepared in Example 2 3 NH 3 PbI 3 DMF perovskites such as Figure 7 As shown, due to the relatively high concentration of perovskite precursors, a large number of crystal nuclei will be rapidly formed in the perovskite solution in the environment of 25 °C, resulting in the disordered growth of the microwir...

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Abstract

The invention discloses a one-dimensional organic-inorganic hybrid perovskite and a preparation method thereof, and the method comprises the steps: mixing precursors CH3NH3X and PbX2 with a solvent at a first temperature, enabling the precursors to be fully dissolved, and obtaining a precursor solution of the organic-inorganic hybrid perovskite; at a second temperature, separating out one-dimensional organic and inorganic hybrid perovskite CH3NH3PbX3 from the precursor solution of the organic and inorganic hybrid perovskite; wherein the second temperature is lower than the first temperature. Therefore, the one-dimensional super-long organic-inorganic hybrid perovskite can be successfully prepared in a substrate-free manner, the length of the prepared one-dimensional perovskite can be greater than 5mm and can also reach the centimeter magnitude or even reach the decimeter magnitude, the crystal quality of the product is relatively high, the product can be transferred to any substrate, and the performance of the product is greatly improved. And the perovskite-based optoelectronic device can be developed towards the direction of high performance and integration.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, and in particular relates to a one-dimensional organic-inorganic hybrid perovskite and a preparation method thereof. Background technique [0002] Perovskite materials have shown important applications in solar cells, photoelectric detection and other fields. One-dimensional perovskite structures have attracted more attention due to their higher crystal quality and fewer grain boundaries. The current synthesis of one-dimensional perovskite is mainly by spin-coating perovskite solution or drop-coating perovskite solution on the substrate, and then by anti-solvent or solvent evaporation method to realize the preparation of one-dimensional perovskite. The one-dimensional perovskites prepared based on substrates are not only difficult to transfer to other substrates but also have limited crystal quality, which hinders the further application of perovskite-based optoelectronic device...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C211/04C30B7/02C30B28/04C30B29/54
CPCC07C209/00C07C211/04C30B29/54C30B7/02C30B28/04C07B2200/13Y02P70/50
Inventor 任天令耿祥顺囤冠华谢丹
Owner TSINGHUA UNIV
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