20405-64-5
Copper(I) Selenide
CAS: 20405-64-5
Molecular Formula: Cu2Se
20405-64-5 - Names and Identifiers
| Name | Copper(I) Selenide |
| Synonyms | COPPER SELENIDE dicopper selenide Copper(I) Selenide |
| CAS | 20405-64-5 |
| EINECS | 243-796-7 |
20405-64-5 - Physico-chemical Properties
| Molecular Formula | Cu2Se |
| Molar Mass | 206.05 |
| Density | 6.84 g/mL at 25 °C (lit.) |
| Melting Point | 1113°C |
| Water Solubility | Soluble in hydrochloric acid. Insoluble in water. |
| Appearance | Pieces |
| Color | Dark blue to black |
| Exposure Limit | ACGIH: TWA 1 mg/m3; TWA 0.2 mg/m3 NIOSH: IDLH 100 mg/m3; IDLH 1 mg/m3; TWA 1 mg/m3; TWA 0.2 mg/m3 |
| Merck | 14,2666 |
| Storage Condition | Room Temprature |
| MDL | MFCD00049908 |
| Physical and Chemical Properties | Nature black cubic crystals. The relative density was 6.749. Melting point 1113 ° C. Obtained by heating a stoichiometric mixture of copper and selenium in a vacuum quartz sealed tube or by reducing an ammonia solution of copper salt and selenous acid with hydrazine hydrate. Used as a semiconductor. |
| Use | Applications cuprous selenide is mainly used for the preparation of group compound semiconductors, cuprous selenide targets, copper indium gallium selenide thin film solar cells. |
20405-64-5 - Risk and Safety
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R33 - Danger of cumulative effects R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S20/21 - S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 3 |
| TSCA | Yes |
| Hazard Class | 6.1(b) |
| Packing Group | III |
20405-64-5 - Uses and methods of synthesis
Overview
cuprous selenide is a semiconductor material that exists in cubic, square, or orthogonal form. It can be formed into thin films and can be used as solar cell materials, filters, thermoelectric converters, photovoltaic devices, and microwave shielding coatings.
Introduction
cuprous selenide is a black cubic crystal or dark gray powder that is soluble in sulfuric acid or potassium cyanide solution and easily oxidized to copper selenite in the presence of nitric acid. Copper powder and a theoretical amount of selenium powder were placed in the reaction tube, and after the air was discharged with a hydrogen stream, the temperature was raised to 500 ° C. To react. Cuprous selenide is often used as a semiconductor material.
preparation method
5N copper 302.37G and 5N selenium block 202.87G with a particle size of 1.08 are weighed according to the molar ratio of 2: and put into two clean graphite boats respectively; then put the two graphite boats into the two ends of the quartz tube horizontally, vacuum pump the quartz tube to 9.0 × 10-3PA, then seal the quartz tube; Place the quartz tube horizontally in the horizontal synthesis furnace of the two treatment zones to heat the reaction, the heating method is the program control temperature zone heating and insulation.
The graphite boat filled with copper is heated in the high-temperature treatment zone, and the temperature is raised to 1200 °c at a heating rate of 15 °c/min, and the temperature is kept at 1200 °c for 6H; after the high-temperature treatment zone rises to 1200 ℃, the low-temperature treatment zone begins to heat the graphite boat containing selenium, raising the temperature to 9.67 ℃ at a heating rate of 580 ℃/min, and keeping the temperature at 580 ℃ for 6H; then the high-temperature treatment zone began to control the slow cooling process to 900 ℃, the cooling rate is 5 ℃/min, after the end of the whole process (that is, after the high-temperature treatment zone dropped to 900 ℃), after natural cooling to room temperature in the low-temperature treatment zone, cuprous selenide crystals were obtained.
Last Update：2024-04-10 22:29:15
Supplier List
Product Name: Copper(I) Selenide Visit Supplier Webpage Request for quotation
CAS: 20405-64-5
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
CAS: 20405-64-5
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
Product Name: Copper(I) Selenide Visit Supplier Webpage Request for quotation
CAS: 20405-64-5
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
CAS: 20405-64-5
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
View History