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Perovskite gain medium, preparation method thereof and application of perovskite gain medium in continuous optical pump laser at room temperature

A gain medium, perovskite technology, applied in the field of lasers, can solve the problem of raising the excitation threshold, and achieve the effect of simple preparation method, reducing optical loss, and reducing the threshold of amplified spontaneous emission

Pending Publication Date: 2022-05-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

However, until now, due to the requirement of low optical loss of the gain medium in vertical cavity surface emitting lasers and the increase of the excitation threshold after the dimensionality reduction of quasi-two-dimensional perovskites, solution-processed quasi-solutions for continuous optical pumping at room temperature have been limited. Two-dimensional perovskite vertical-cavity surface-emitting lasers have yet to be realized

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  • Perovskite gain medium, preparation method thereof and application of perovskite gain medium in continuous optical pump laser at room temperature
  • Perovskite gain medium, preparation method thereof and application of perovskite gain medium in continuous optical pump laser at room temperature
  • Perovskite gain medium, preparation method thereof and application of perovskite gain medium in continuous optical pump laser at room temperature

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preparation example Construction

[0034] The invention provides a preparation method of a perovskite gain medium, comprising the following steps:

[0035] A) Combine LX, MX and PbX 2 Dissolved in solvent to obtain quasi-2D perovskite L 2 M n-1 Pb n X 3n+1 Precursor solution, n>1;

[0036] X is halogen anion, LX is n-butyl ammonium halide, isobutyl ammonium halide, aminovaleric acid halide, 1-naphthylmethyl ammonium halide, phenethyl amine halide, n-butyl amine halide, benzyl amine halide , one or more of phenylpropyl amine halide, phenylbutyl amine halide, n-octylamine hydrohalide, ethylamine hydrohalide and guanidine hydrohalide; MX is formamidine hydrohalide, One or more of methyl amine halide and cesium halide;

[0037] B) The quasi-2D perovskite precursor solution was coated on the surface of the substrate, and the anti-solvent was added dropwise during the coating process, and then the solvent was removed by annealing to obtain L2 M n-1 Pb n X 3n+1 perovskite gain medium;

[0038] The anti-solve...

Embodiment 1

[0065] The mirrors were sequentially placed in deionized water, acetone, and isopropanol for ultrasonic cleaning for 15 minutes, and the isopropanol was boiled for 3 minutes. The bottom DBR mirror was blown dry with nitrogen for use.

[0066] 0.6 mmol of lead bromide (PbBr 2 ), 0.48 mmol of formamidine hydrobromic acid (FABr), 0.24 mmol of 1-naphthylmethylammonium bromide (NMABr) were dissolved in 1 mL of N,N-dimethylformamide (DMF), and stirred at room temperature for 12 hours, The perovskite precursor solution was prepared, and the obtained solution was filtered for use. Then, the obtained perovskite precursor solution was spin-coated on the surface of the cleaned commercial bottom DBR mirror, the reflection center wavelength was 540 nm, the reflectivity of the mirror was 99.9%, and the high reflection area was 470-600 nm. The spin-coating speed was 4300 rpm, and the spin-coating time was 30 seconds. 0.12 mL of toluene was rapidly added to the rotating surface as an anti-so...

Embodiment 2

[0069] The mirrors were sequentially placed in deionized water, acetone, and isopropanol for ultrasonic cleaning for 15 minutes, and the isopropanol was boiled for 3 minutes. The bottom DBR mirror was blown dry with nitrogen for use.

[0070] 0.6 mmol of lead bromide (PbBr 2 ), 0.48 mmol of formamidine hydrobromic acid (FABr), 0.24 mmol of 1-naphthylmethylammonium bromide (NMABr) were dissolved in 1 mL of N,N-dimethylformamide (DMF), and stirred at room temperature for 12 hours, The perovskite precursor solution was prepared, and the obtained solution was filtered for use. Then, the obtained perovskite precursor solution was spin-coated on the surface of the cleaned commercial bottom DBR mirror, the reflection center wavelength was 540 nm, the reflectivity of the mirror was 99.9%, and the high reflection area was 470-600 nm. The spin coating speed was 4300 rpm, the spin coating time was 30 seconds, and 0.12 mL of ethyl acetate was rapidly added dropwise to the rotating surfac...

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Abstract

The invention provides a preparation method of a perovskite gain medium, which comprises the following steps: A) dissolving LX, MX and PbX2 in a solvent to obtain a quasi-two-dimensional perovskite L2Mn-1PbnX3n + 1 precursor solution, n being greater than 1; and B) coating the surface of a substrate with the quasi-two-dimensional perovskite precursor solution, dropwise adding an anti-solvent in the coating process, and then removing the solvent through annealing to obtain the L2Mn-1PbnX3n + 1 perovskite gain medium. The preparation method is simple, and the surface of the quasi-two-dimensional perovskite material film prepared by adopting the anti-solvent assisted solution spin-coating method has very low roughness, so that the optical loss of the laser gain medium is greatly reduced, and the amplified spontaneous emission threshold of the perovskite gain medium is greatly reduced. The invention further provides the perovskite gain medium, application of the perovskite gain medium in a continuous optical pump laser at room temperature and a vertical cavity surface emitting laser.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a perovskite gain medium, a preparation method thereof and its application in a continuous optical pump laser at room temperature. Background technique [0002] Quasi-2D organic-inorganic lead halide perovskites have attracted extensive attention in optoelectronics due to their excellent photophysical properties, low cost, and solution processability. Quasi-2D perovskites have high exciton binding energies, high gain coefficients, and strong exciton confinement due to their natural quantum well structure and high dielectric constant of large organic cations, which make them suitable as optical gain media. For laser applications, it is a promising gain medium for solution-processed semiconductor lasers. [0003] Semiconductor lasers are a class of coherent radiation sources. Due to their high intensity, good directionality and strong coherence, they have been widely us...

Claims

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Application Information

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IPC IPC(8): H01S3/16
CPCH01S3/16Y02E10/549
Inventor 秦川江高祥
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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