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A preparation method of antimony selenide micron single crystal particles

A single crystal particle, antimony selenide technology, applied in chemical instruments and methods, single crystal growth, single crystal growth and other directions, can solve problems such as difficulty in growing large-sized single crystals, and achieve improved conversion efficiency, excellent performance, and improved performance. The effect of utilization

Active Publication Date: 2018-05-22
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, domestic and international researches on Sb 2 Se 3 Applications of materials in solar cells, Sb 2 Se 3 The preparation mainly includes solution hot injection method, solvothermal method, hydrothermal method, electrodeposition method, thermal spraying method and other processes, and mainly prepares nanotubes, nanowires, and nanofilms, while Sb 2 Se 3 The preparation of large-particle single crystals is still a technical problem; when preparing solar cells, the performance of single crystal cells is better than that of thin film cells, but traditional single crystal growth technologies (gas phase transport technology, melting technology) are difficult to grow Produce large-sized single crystals that meet the performance requirements of the solar cell absorber layer

Method used

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  • A preparation method of antimony selenide micron single crystal particles
  • A preparation method of antimony selenide micron single crystal particles
  • A preparation method of antimony selenide micron single crystal particles

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Experimental program
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Effect test

Embodiment 1

[0034] Weigh the reaction raw materials 2 mmol Sb, 3 mmol Se and flux 10 mmol CsCl, mix them to obtain the precursor, grind the precursor thoroughly to make it evenly mixed; put the mixed sample into a quartz bottle, and use a vacuum pump unit Vacuum up to 10~10 2 Pa (can also be protected with an inert gas), so as to eliminate the influence of air on the molten salt reaction, seal the quartz bottle with an oxyhydrogen flame; place the sealed quartz bottle with the mixed sample in an ordinary heating furnace and heat it from normal temperature to 700 Keep the temperature at ℃ for 72h, then cool down to 450℃, take out the quartz bottle and quickly cool it down to room temperature (put it in water); finally take out the sample in the quartz bottle, wash it with ultrasonic water several times to remove the flux CsCl, and then put the sample in a drying oven at 80℃ Dry for 2 h to obtain micron-sized Sb with crystal luster on the surface 2 Se 3 Single crystal particles, about 55 ...

Embodiment 2

[0037] Weigh the reaction raw materials 2 mmol Sb, 4 mmol Se and flux 30 mmol CsI, mix them to obtain the precursor, fully grind the precursor to make it evenly mixed; put the mixed sample into a quartz bottle, and use a vacuum pump unit to pump Vacuum reaches 10~10 2 Pa (can also be protected with an inert gas), so as to eliminate the influence of air on the molten salt reaction, seal the quartz bottle with an oxyhydrogen flame; place the sealed quartz bottle with the mixed sample in an ordinary heating furnace to heat from normal temperature to 650 Keep the temperature at ℃ for 96h, then cool down to 450℃, take out the quartz bottle and quickly cool it down to room temperature (put it in water); finally take out the sample in the quartz bottle, wash it with ultrasonic water several times to remove the flux CsI, and then put the sample in a drying oven at 80℃ Dry for 2 h to obtain micron-sized Sb with crystal luster on the surface 2 Se 3 Single crystal particles, about 60 m...

Embodiment 3

[0040] Weigh the reaction raw materials 2 mmol Sb, 6 mmol Se and flux 64 mmol KI, mix them to obtain the precursor, fully grind the precursor to make it evenly mixed; put the mixed sample into a quartz bottle, and use a vacuum pump unit Vacuum up to 10~10 2 Pa (can also be protected with an inert gas), so as to eliminate the influence of air on the molten salt reaction, seal the quartz bottle with an oxyhydrogen flame; place the sealed quartz bottle with the mixed sample in an ordinary heating furnace and heat it from normal temperature to 600 Keep at ℃ for 120h, then cool down to 450℃, take out the quartz bottle and quickly cool it down to room temperature (put it in water); finally take out the sample in the quartz bottle, wash it with ultrasonic water several times to remove the flux KI, and then put the sample in a drying oven at 80℃ Dry for 2 h to obtain micron-sized Sb with crystal luster on the surface 2 Se 3 Single crystal particles, about 50 microns.

[0041] For t...

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Abstract

The invention discloses a preparation method of antimony selenide monocrystal microparticles. The method comprises the following steps: grinding and mixing a simple substance antimony, a simple substance selenium and a fluxing agent, encapsulating the mixture in a quartz reaction vessel in a vacuum, keeping the temperature at 600-750 DEG C for 48-120 hours, and quickly cooling the quartz reaction vessel; and taking out the sample, washing and drying to obtain the antimony selenide monocrystal particles. The size of the monocrystal particles can be regulated by utilizing the recrystallization temperature and time; the particle components can be effectively regulated within a certain range through the mole ratio of the elements in the precursor; and the prepared monocrystal particles have the advantages of high uniformity, controllable size and better properties than the monocrystal particles prepared by the traditional method.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic materials and devices, and more specifically, to a method for preparing antimony selenide micron single crystal particles. Background technique [0002] Solar cells have always been a research hotspot. The current compound thin-film cells mainly include cadmium telluride (CdTe) and copper indium gallium selenide (CIGS) solar cells. These two types of cells are highly toxic due to some elements contained in them and also contain some elements. Resources are scarce and expensive, and it is difficult to apply them on a large scale; however, copper-zinc-tin-sulfur (CZTS)-based solar cells that have emerged in recent years use Zn and Sn, which have large reserves and low prices, to replace In in CIGS, and have achieved 12.7% Photoelectric conversion efficiency records, but CZTS and CIGS are both multi-component systems, the thermodynamic stability range is small, and the control of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B9/12
CPCC30B9/12C30B29/46
Inventor 廖峻张军邵乐喜
Owner LINGNAN NORMAL UNIV
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