Wavelength tunable laser generation method based on perovskite thin film

A production method and perovskite technology, applied in the field of lasers, can solve the problems of increased system cost, inability to achieve continuous adjustment of wavelength, laser system damage and pollution, etc., and achieve low cost, stable light output, good repeatability and The effect of stability

Active Publication Date: 2022-03-18
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method brings a lot of inconvenience to people in the actual use process, increases the cost of the system, and cannot realize the continuous adjustment of the wavelength, and even causes damage and pollution to the laser system.

Method used

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  • Wavelength tunable laser generation method based on perovskite thin film
  • Wavelength tunable laser generation method based on perovskite thin film
  • Wavelength tunable laser generation method based on perovskite thin film

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Embodiment approach 1

[0022] The present embodiment provides a method of generating a wavelength tunable laser generating method based on a perovskite film, mainly including the following steps:

[0023] 1, method of preparation of perovskite film.

[0024] The main component of the perovskite film is CH 3 NH 3 PB (i 0.5 BR 0.5 ) 3 It is prepared by spin coating. Specific steps are as follows:

[0025] 1 cleaning the glass substrate. Square glass having a side length of 15 mm was first put into glass cleaning agent, ethanol, acetone, and deionized water, for 15 minutes, respectively, after washing, was purged with flowing nitrogen.

[0026] 2 Preparation of precursor solution precursor solution in perovskite ore. Methyl iodide (CH) 3 NH 3 I), lead (PBI) 2 ), Methyl bromide (CH 3 NH 3 BR) and lead in bromide (PBBR 2 After blending with a molar ratio of 0.5: 0.5: 0.5: 0.5, the blend of N, N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) was added. Solvent, stirred at room temperature for 12 hours,...

Embodiment approach 2

[0038] The present embodiment provides a method of generating a wavelength tunable laser generating method based on a perovskite film, mainly including the following steps:

[0039] 1, method of preparation of perovskite film.

[0040] The main component of the perovskite film is CH 3 NH 3 PB (i 0.78 BR 0.22 ) 3 It is prepared by spin coating.

[0041] 1 cleaning the glass substrate. Square glass having a side length of 15 mm was first put into glass cleaning agent, ethanol, acetone, and deionized water, for 15 minutes, respectively, after washing, was purged with flowing nitrogen.

[0042] 2 Preparation of precursor solution precursor solution inlate, methyl iodide (CH) 3 NH 3 I), lead (PBI) 2 ), Methyl bromide (CH 3 NH 3 BR) and lead in bromide (PBBR 2 After blending with a molar ratio of 0.78: 0.78: 0.22: 0.22, the blend of N, N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) was added. Solvent, stirred at room temperature for 12 hours, prepared 1 mol / L of CH 3 NH 3 PB ...

Embodiment approach 3

[0052] Selecting a quartz grating as a substrate, selecting any of the two embodiments described above, that is, a laser radiation output can be realized. The output laser peak half wave width is more narrow than amplifying the radiation, therefore has better monochrome.

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Abstract

The invention relates to the field of laser technology, and discloses a method for generating a wavelength-tunable laser based on a perovskite thin film, comprising the following steps: mixing methyl ammonium iodide and methyl ammonium bromide at a molar ratio of 1-x:x After proportional blending, add isopropanol solvent to form a post-treatment solution; spin-coat the post-treatment solution on the surface of the perovskite film, anneal, and then cool to room temperature; encapsulate the perovskite film; control the perovskite The temperature of the mineral thin film is at a constant temperature between ‑80 and 25 °C; the pump light is focused and irradiated on the surface of the perovskite thin film to form a pump spot; the modulated light is focused and formed on the surface of the perovskite thin The irradiation spot completely overlaps the Pu spot; the modulation frequency, duty cycle and light intensity of the modulated light are controlled to realize continuous adjustment of the output wavelength. By adjusting the modulation frequency of the light, the wavelength of the output laser can be continuously adjusted, and it has good repeatability and stability.

Description

Technical field [0001] The present invention relates to the field of laser light, and more particularly to a method of tunable laser generating a perovskite film. Background technique [0002] Wavelength tuning lasers are lasers that can continuously change the wavelength of the laser output within a certain range. Such lasers can be widely used in multiple fields such as spectral analysis, communication, biomedical. According to the actual needs of people, the output wavelength of the laser changes will change by adjusting the control unit of the laser. [0003] The perovskite material has a good optical absorption coefficient and a higher luminous quantum efficiency, so that this material has great application prospects in the fields of light emitting devices and laser devices, thereby being widely concerned by researchers. The study found that the band gap of the perovskite material is related to the ratio of the halogen component. Studies have shown that by changing the halog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/10H01S3/16
CPCH01S3/16H01S3/10084
Inventor 杨潇曹成龙邢栋梁葛嘉庆仇宏扬周事硕蒋青松朱铁柱季仁东张宇林
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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