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Quartz boat and method for using quartz boat to complete polycrystalline synthesis and single crystal growth of gallium selenide at one time

A quartz boat and quartz technology, applied in the field of crystal synthesis devices, can solve the problems of high cost and high single crystal impurities, and achieve the effects of simple operation, improved quality and excellent optical quality.

Active Publication Date: 2019-06-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of high impurity and high cost of the single crystal prepared by the existing two-step single crystal growth method, and provides a quartz boat and the use of the quartz boat for one-time completion of gallium selenide polycrystalline synthesis and single crystal growth method

Method used

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  • Quartz boat and method for using quartz boat to complete polycrystalline synthesis and single crystal growth of gallium selenide at one time
  • Quartz boat and method for using quartz boat to complete polycrystalline synthesis and single crystal growth of gallium selenide at one time
  • Quartz boat and method for using quartz boat to complete polycrystalline synthesis and single crystal growth of gallium selenide at one time

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specific Embodiment approach 1

[0027] Embodiment 1: The quartz boat of this embodiment is composed of a seed crystal well area 1, a shoulder area 2, a closed area 3, and an open area 4; wherein the seed crystal well area 1 is cylindrical with one end sealed; the shoulder area 2 is frustum-shaped; closed area 3 is cylindrical; open area 4 is semi-cylindrical; seed crystal well area 1, shoulder area 2, closed area 3 and open area 4 are connected in sequence, and their axes are on the same straight line superior.

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that the seed crystal well region 1 is connected to the shoulder region 2 by an arc, and the shoulder region 2 and the closed region 3 are connected by an arc; others are the same as Embodiment 1. same.

[0029] The setting of this embodiment is beneficial to the continuous and stable growth of single crystal in the single crystal growth stage.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the ratio of the diameters of the seed crystal well region 1 to the closed region 3 is 1: (5-8); others are the same as Embodiment 1 or Embodiment 2.

[0031] The arrangement in this embodiment is beneficial to the growth of the crystal along the required crystal phase, and avoids the reduction of the utilization rate of the crystal caused by the excessive length of the seed crystal well.

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Abstract

A quartz boat and a method for using the quartz boat to complete polycrystalline synthesis and single crystal growth of gallium selenide at one time are disclosed, and the present invention relates toa crystal synthesis apparatus and method. The invention aims to solve the technical problem that a single crystal obtained through an existing two-step growth method is high in impurity content and high in cost. The quartz boat of the present invention is composed of a seed crystal well region, a shouldering regiona closed region and an open region, wherein the seed crystal well region is in a cylindrical shape sealed at one end, the shouldering region is in a truncated cone shape, the closed region is in a cylindrical shape, the open region is semi-cylindrical, the regions are connected in sequence, and the axes of the regions are in a straight line. The method of using the quartz boat to complete polycrystal synthesis and single crystal growth of gallium selenide comprises the steps of:adding selenium and gallium to the closed zone of the quartz boat, and placing the quartz boat in a quartz tube for vacuum encapsulation; synthesizing polycrystalline in a single temperature zone furnace; and then directly placing the quartz tube in a vertical bridgman furnace to obtain a GaSe single crystal. The single crystal absorption coefficient is less than 0.1 cm<-1>. The quartz boat can be used for crystal synthesis.

Description

technical field [0001] The invention relates to a crystal synthesis device and method. Background technique [0002] Gallium selenide crystals have a wide range of applications in the optical field because of the advantages of being able to generate electromagnetic radiation in the mid-infrared, far-infrared and terahertz bands. Generally, the growth of a large-volume single crystal requires the synthesis of a polycrystal first, and then grows a single crystal with the polycrystal as a raw material, which requires a two-step process. In the process of polycrystalline synthesis and single crystal growth, the utensils that must be used to carry materials are trough-shaped, tubular boats, quartz boats or PBN boats. Usually, the synthesized polycrystalline materials should be taken out of the small boat and placed in a new small boat. , single crystal growth was performed. In the growth process of single crystal, impurities have a great influence on the crystal, and the introd...

Claims

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Application Information

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IPC IPC(8): C30B11/00C30B28/06C30B29/46
Inventor 朱崇强陈亮杨春晖马天慧郝树伟雷作涛
Owner HARBIN INST OF TECH
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