Preparation method of CuAlO2 monocrystal

A single crystal and drying technology, which is applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of poor uniformity and repeatability, degradation of photoelectric performance of materials, etc., and achieve short reaction cycle, low preparation cost, Simple operation effect

Inactive Publication Date: 2010-09-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CuAlO prepared in the traditional high-temperature sintering method 2 Poor uniformity and repeatability, and prone to Cu 2 O or CuO impurity phases, leading to a decrease in the optoelectronic properties of the material

Method used

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  • Preparation method of CuAlO2 monocrystal
  • Preparation method of CuAlO2 monocrystal
  • Preparation method of CuAlO2 monocrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1: Step 1: First, add analytically pure copper nitrate trihydrate and aluminum isopropoxide into ethylene glycol according to the copper-aluminum atomic ratio of 1:1, and prepare a blue transparent solution with a metal ion concentration of 0.6 mol / L. Solution A; step 2: then add citric acid to solution A with magnetic stirring to form a uniform precursor sol; wherein the molar ratio of citric acid to metal ions in solution A is 1:1; step 3: put the precursor sol in a drying oven Dry at 120°C for 10 hours to form a xerogel, and then grind the dried gel with an agate mortar; step 4: irradiate the ground xerogel with ultraviolet light for 60 minutes for photochemical reaction, and then put it into a silicon carbide rod Calcined in the furnace at 500°C for 4h, then cooled to room temperature with the furnace to obtain CuAlO 2 single crystal.

[0014] The CuAlO obtained in this example 2 The powder was analyzed by a Japanese Rigaku D / max2000PC X-ray diffractometer...

Embodiment 2

[0015] Example 2: Step 1: First, add analytically pure copper nitrate trihydrate and aluminum isopropoxide into ethylene glycol according to the copper-aluminum atomic ratio of 1:1, and prepare a blue transparent solution with a metal ion concentration of 0.5 mol / L. Solution A; step two: then add citric acid to solution A with magnetic stirring to form a uniform precursor sol; wherein the molar ratio of citric acid to metal ions in solution A is 0.8:1; step three: put the precursor sol in a dry box Dry at 140°C for 9 hours to form a xerogel, and then grind the dried gel with an agate mortar; step 4: irradiate the ground xerogel with ultraviolet light for 55 minutes for photochemical reaction, and then put it into a silicon carbide rod Calcined in the furnace at 550°C for 3h, then cooled to room temperature with the furnace to obtain CuAlO 2 single crystal.

Embodiment 3

[0016] Example 3: Step 1: First, add analytically pure copper nitrate trihydrate and aluminum isopropoxide into ethylene glycol according to the copper-aluminum atomic ratio of 1:1, and prepare a blue transparent solution with a metal ion concentration of 0.4 mol / L. Solution A; step two: then add citric acid to solution A with magnetic stirring to form a uniform precursor sol; wherein the molar ratio of citric acid to metal ions in solution A is 1.2:1; step three: put the precursor sol in a dry box Dry at 160°C for 8 hours to form a xerogel, and then grind the dried gel with an agate mortar; step 4: irradiate the ground xerogel with ultraviolet light for 50 minutes for photochemical reaction, and then put it into a silicon carbide rod Calcined in the furnace at 600°C for 2h, then cooled to room temperature with the furnace to obtain CuAlO 2 single crystal.

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Abstract

The invention relates to a preparation method of CuAlO2 monocrystal, which comprises the following steps that: first, copper nitrate trihydrate and aluminum isopropoxide are added into glycol to prepare blue transparent solution A; then citric acid and water are added into the solution A to be magnetically stirred into uniform precursor sol; the precursor sol is dried to form dry gel, and then an agate mortar is adopted to grind the dried gel; and the ground dry gel is radiated by ultraviolet light, has photochemical reaction, and then put into a silicon carbide rod furnace to be calcined, and the CuAlO2 monocrystal is obtained. The preparation method integrates a citric sol-gel method and the photochemical reaction, and prepares the CuAlO2 monocrystal; and by integrating the citric sol-gel method and the photochemical reaction, the preparation method of the CuAlO2 monocrystal not only has the advantages of low preparation cost, simple operation and short reaction cycle, but also can synthesize the CuAlO2 monocrystal at lower temperature and within shorter heat treatment time.

Description

technical field [0001] The invention relates to a preparation method of a p-type transparent conductive oxide (TCO) material, in particular to a CuAlO 2 Single crystal preparation method. Background technique [0002] Transparent conductive oxide (TCO) is a material with good transmittance and conductivity in the visible light region. It has a wide range of applications. At present, it is mainly used in transparent electrodes of solar cells and flat panel displays, electromagnetic protective screens and architectural glass. Infrared reflective coating, etc. (Hiroshi Kawazoe, Masahiro Yasukawa, Hiroyuki Hyodo.P-type electrical conduction in transparent thin films of CuAlO 2 . Nature, 1997, 389(30): 939-942.). Most of the currently available transparent conductive oxides are n-type, such as Al-doped ZnO, S-doped In 2 o 3 , F-doped SnO 2 etc., hindering the research and development of TCO to semiconductor fully transparent optoelectronic devices based on p-n junctions. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B5/00
Inventor 黄剑锋李抗施浙勇张钦峰曹丽云
Owner SHAANXI UNIV OF SCI & TECH
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