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Organic and inorganic composite perovskite single crystal induced transformation method and device based on methylamine atmosphere

An inorganic composite and perovskite technology, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve problems that are not conducive to the controllable growth of high-quality single crystals, cumbersome steps, and organic-inorganic composite perovskite crystals. Material research is weak and other issues

Inactive Publication Date: 2017-05-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is cumbersome and requires multi-cycle and staged growth, which is not conducive to the controllable growth of high-quality single crystals
Compared with the rich research results of organic-inorganic composite perovskite single crystal thin films, the research on organic-inorganic composite perovskite crystal materials is relatively weak, especially for the controllable growth of organic-inorganic composite perovskite single crystal materials and the control of The obtained single crystal is subjected to special treatment to obtain an optimized single crystal conversion method, which has not been reported at home and abroad so far.

Method used

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  • Organic and inorganic composite perovskite single crystal induced transformation method and device based on methylamine atmosphere
  • Organic and inorganic composite perovskite single crystal induced transformation method and device based on methylamine atmosphere
  • Organic and inorganic composite perovskite single crystal induced transformation method and device based on methylamine atmosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1. Methylamine gas induces one-dimensional DAPbI 3 Single crystal transformation

[0063] One, DAPbI 3 Single crystal preparation

[0064] (a) Accurately weigh the dimethylamine hydrochloride according to the stoichiometric ratio, and add it to the 45wt% HI solution to obtain a yellow transparent solution.

[0065] (b) Accurately weigh PbO according to the stoichiometric ratio and add it to the yellow transparent solution of step (a) to produce a light yellow precipitate. Heat up in an oil bath until the precipitate is completely dissolved, and a yellow clear solution is obtained, which drops to the saturation point After that, the temperature is slowly lowered and DAPbI crystallizes spontaneously 3 Yellow single crystal, the photo is like figure 2 As shown, the crystal size is approximately 1 mm.

[0066] 2. Methylamine gas induces DAPbI 3 Single crystal

[0067] The DAPbI prepared above 3 The single crystal is placed in a methylamine atmosphere, and treated at 120℃ fo...

Embodiment 2

[0071] Example 2. As described in Example 1, the difference is that methylamine gas induces DAPbI 3 For single crystal, induce treatment at 100℃ for 8-10h to obtain black MA 0.1 DA 0.9 PbI 3 Single crystal.

Embodiment 3

[0072] Example 3: Methylamine gas induces two-dimensional BA 2 PbI 4 Single crystal

[0073] One, BA 2 PbI 4 Single crystal preparation

[0074] (a) Butylamine iodide CH 3 (CH 2 ) 3 NH 3 Synthesis preparation of I:

[0075] Put CH in an ice water bath 3 (CH 2 ) 3 NH 3 Add the solution to the HI solution and react for 3.5h; CH 3 (CH 2 ) 3 NH 2 :HI=1.5:1 molar ratio. The mass percentage concentration of the butylamine solution is 99 wt%, and the mass percentage concentration of the HI solution is 45 wt%. After rotary evaporation with a vacuum rotary evaporator, white butylamine iodide is obtained, which is placed in a vacuum drying oven to dry for 2 hours to obtain dry butylamine iodide crystals.

[0076] (b) PbO is accurately weighed according to the stoichiometric ratio and added to the 45wt% HI solution to obtain a yellow transparent solution.

[0077] (c) Accurately weigh CH according to the stoichiometric ratio 3 (CH 2 ) 3 NH 3 I. Add it to the yellow transparent solution of step (...

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Abstract

The invention relates to organic and inorganic composite perovskite single crystal induced transformation method and device based on a methylamine atmosphere. The method comprises the following steps: putting an organic and inorganic composite perovskite single crystal into the methylamine atmosphere; and carrying out induced treatment for 3h to 36h at the temperature of 40 DEG C-150 DEG C. The invention further provides a device for inducing the signal crystal to transform by methylamine gas. After a wide-band gap perovskite material induces the transformation, an optical absorption range is greatly expanded and the photoelectric properties are greatly improved; and the wide-band gap perovskite material can be widely applied to the fields of solar batteries, photoelectric detectors and the like. The method and equipment are simple, the price is low and the preparation is efficient.

Description

Technical field [0001] The invention relates to a method for converting organic-inorganic composite perovskite single crystal to single crystal, in particular to a method and device for inducing conversion of organic-inorganic composite perovskite single crystal based on methylamine atmosphere, and belongs to the technical field of semiconductor crystal materials. Background technique [0002] In 2009, Miyasaka of Toin Yokohama University in Japan used the perovskite material CH 3 NH 3 PbBr 3 And CH 3 NH 3 PbI 3 Used in solar cells, it opened the prelude to the research of perovskite materials, which enabled the in-depth research and development of organic-inorganic composite perovskite materials. Organic-inorganic composite perovskite materials, especially organic-inorganic composite lead-based perovskite materials, as a new type of semiconductor material, exhibit special photoelectric and phase change properties. Based on its many advantages, it has potential application value ...

Claims

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Application Information

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IPC IPC(8): C30B29/54C30B7/14
CPCC30B29/54C30B7/14
Inventor 陶绪堂居佃兴党洋洋
Owner SHANDONG UNIV
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