Synthesis of several metal selenides and tellurides as semiconductor material

A metal selenide and semiconductor technology, which is applied in selenium/tellurium compounds, binary selenium/tellurium compounds, chemical instruments and methods, etc., can solve the problems of low crystallinity of products, highly toxic hydrogen selenide, and high starting temperature. , to achieve the effect of stable product quality, simple equipment and low reaction temperature

Inactive Publication Date: 2002-12-11
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

For example, Holland "Journal of Materials Science" (Journal of Materials Science) 1990, volume 25, page 1159, reported using hydrogen selenide as a selenium source for solid-phase synthesis of selenides at high temperatures, and this method has a higher initial temperature (> 500 ° C) , the hydrogen selenide used is highly toxic; Holland "Materials Research Bulletin" (Materials Research Bulletin) 1995, volume 30, page 1495, reported that selenium was used as selenium source, and selenide was prepared by high-energy ball milling, and its product crystallinity was not high
Journal of American Chemical Society (Journal of American Chemical Society) 1988 110 volume 3046 pages report adopts organometallic raw material to prepare amorphous cadmium selenide under the isolated air environment; Synthesis of cadmium selenide nanorods from selenium, but expensive surfactants are required

Method used

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  • Synthesis of several metal selenides and tellurides as semiconductor material
  • Synthesis of several metal selenides and tellurides as semiconductor material
  • Synthesis of several metal selenides and tellurides as semiconductor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh a certain amount of analytically pure silver nitrate, add an appropriate amount of deionized water to dissolve, transfer the clear solution to a stainless steel pressure-resistant reactor, add one-half molar amount of sodium selenite and one-fold excess of hydrazine hydrate into this To the reactor, add deionized water to 70% of the total volume, seal the reactor, and react at 100°C for 2 hours. Then it was cooled to room temperature, the reaction kettle was opened, filtered with a cloth funnel, and washed with deionized water to obtain a black powder. The product was identified as silver selenide by X-ray powder diffraction; under other conditions unchanged, the hydrazine hydrate in the above raw materials was replaced by sodium borohydride, potassium borohydride, hydroxylamine, and hydrazine sulfate, and sodium selenite was replaced by sodium borohydride, potassium borohydride, hydroxylamine, and hydrazine sulfate. After becoming selenite and ammonium selenite, the ...

Embodiment 2

[0028] Weigh a certain amount of analytically pure zinc nitrate, add an appropriate amount of deionized water to dissolve, transfer this clear solution to a stainless steel pressure-resistant reactor, add equimolar amounts of sodium selenite and an excess of 3 times hydrazine hydrate into this reactor, add Deionized water to 70% of the total volume, seal the reactor, and react at 180°C for 1 day. Then it was cooled to room temperature, the reaction kettle was opened, filtered with a cloth funnel, and washed with deionized water to obtain a green powder. The product was identified as zinc selenide by X-ray powder diffraction; under other conditions unchanged, the zinc nitrate in the above raw materials was replaced with zinc chloride and zinc sulfate, and hydrazine hydrate was replaced with sodium borohydride, potassium borohydride, and hydroxylamine. After hydrazine sulfate, sodium selenite is replaced with selenite and ammonium selenite, the product is the same; the selenium sour...

Embodiment 3

[0030] Weigh a certain amount of analytically pure cadmium nitrate, add an appropriate amount of deionized water to dissolve, transfer this clear solution to a stainless steel pressure-resistant reactor, add equimolar amounts of sodium selenite and an excess of 3 times hydrazine hydrate into this reactor, add Deionized water to 70% of the total volume, seal the reactor, and react at 100°C for 1 day. Then it was cooled to room temperature, the reaction kettle was opened, filtered with a cloth funnel, and washed with deionized water to obtain a black powder. The product was identified as cadmium selenide by X-ray powder diffraction. When other conditions remain unchanged, the reaction temperature is controlled at 100℃, 140℃, 180℃, and the preparation of cadmium selenide semiconductor materials that vary from fractal to rod shape can be controlled (see (Figure 1-Figure 3) . Replace the cadmium nitrate in the above raw materials with cadmium chloride and cadmium sulfate, replace hydra...

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PUM

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Abstract

By using the soluble salt of transition metalz Zn, Cd, Pb, Mn, Co, Ni, Cu, Ag, Sb and Bi, selenious acid or its solutl salt, or antimonous acid or its soluble salt as raw material, and hydrazine hydrate, sodium borohydride, potassium borohydride, hydroxylamine or hydrazine sulfate as reductant, and through hydrothermal reduction reaction at 100-200 deg.c in a sealed container for 2 hr to 5 days, selenides or tellurides of the said metals as semiconductor material may be synthesized. Unlike available synthesis process, which needs high temperature, toxic feedstock and complex technological course, the present invention has the advantages of low-cost material, simple apparatus, easy control, good technological reproducibility, stable product quality, etc.

Description

Technical field [0001] The invention relates to a method for preparing selenide and telluride semiconductor materials by adopting high-valence selenium source and telluride source reduction reaction method. Background technique [0002] Selenide and telluride are an important class of semiconductor materials. The current methods for synthesizing selenide and telluride all use low-valence selenium sources or tellurium sources. For example, the Dutch "Journal of Materials Science" in 1990, volume 25, page 1159 reported that the solid-phase synthesis of selenide using hydrogen selenide as the selenium source at high temperature, the starting temperature of this method is higher (>500℃) , The hydrogen selenide used is highly toxic; the Netherlands "Materials Research Bulletin" (Materials Research Bulletin), 1995, volume 30, page 1495, reported that selenium was used as the source of selenium and selenide was prepared by high-energy ball milling, and the crystallinity of the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00C01B19/04H01L21/02
Inventor 李亚栋彭卿董亚杰
Owner TSINGHUA UNIV
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