- CADMIUM SELENIDE
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- $1.00 / 50g
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2019-07-06
- CAS:1306-24-7
- Min. Order: 50 g
- Purity: 99.9%
- Supply Ability: 20kg
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| | CADMIUM SELENIDE Basic information |
| Product Name: | CADMIUM SELENIDE | | Synonyms: | CadMiuM selenide/zinc selenide/zinc sulfide CANdotsquantuM dot (CdSe core/shell/shell), 50uMol/L in hexane, 550nM peak eMission;CadMiuM selenide CANdots quantuM dot (CdSe core), 50uMol/L in hexane, 600nM peak eMission;CadMiuM selenide CANdots quantuM dot (CdSe core) kit, 50uMol/L in hexane, 525-625nM peak eMissions;CadMiuM selenide/cadMiuM sulfide CANdots quantuM rod (CdSe/CdS elongated core/shell), 5 Mg/Ml in hexane, 590nM peak eMission;CadMiuM selenide/cadMiuM sulfide CANdot quantuM rod kit (CdSe/CdS elongated core/shell), 5 Mg/Ml in hexane, 560nM, 590nM, 620nM peak eMissions;Lumidot(TM) CdSe/ZnS 595;Lumidot# CdSe-6, quantum dot nanoparticles kit, core type;Lumidot CdSe/ZnS 630 | | CAS: | 1306-24-7 | | MF: | CdSe | | MW: | 191.37 | | EINECS: | 215-148-3 | | Product Categories: | metal chalcogenides;Chalcogenides;Materials Science;Metal and Ceramic Science;Inorganics | | Mol File: | 1306-24-7.mol |  |
| | CADMIUM SELENIDE Chemical Properties |
| Melting point | >1350°C | | density | 5.81 g/mL at 25 °C(lit.) | | refractive index | 2.87 (900 nm) | | storage temp. | 2-8°C | | solubility | insoluble in H2O | | form | granular | | color | Brown-red to black | | Specific Gravity | 5.81 | | Water Solubility | Insoluble in water. | | Sensitive | air sensitive, store cold | | Crystal Structure | Hexagonal, Wurtzite (Zincite) Structure - Space Group P 63mc | | Merck | 14,1626 | | Exposure limits | ACGIH: TWA 0.01 mg/m3; TWA 0.002 mg/m3; TWA 0.2 mg/m3
NIOSH: IDLH 9 mg/m3; IDLH 1 mg/m3; TWA 0.2 mg/m3 | | Stability: | store cold | | CAS DataBase Reference | 1306-24-7(CAS DataBase Reference) | | EPA Substance Registry System | Cadmium selenide (CdSe) (1306-24-7) |
| | CADMIUM SELENIDE Usage And Synthesis |
| Chemical Properties | 3–12mm pieces (sintered), and -325 mesh 10μm or less with 99.999% purity; white to brown; cub or hexagonal crystal(s); hex: a=0.4309nm, c=0.7021 nm, enthalpy of fusion 305.307 kJ/mol; becomes red in sunlight; used as a red pigment, in semiconductors, and as an evaporation material and sputtering target to produce photoconductive films and infrared filters; possible use in the electrofabrication of microdiode arrays [HAW93] [MER06] [CER91] [KLE93] [KRE91] | | Physical properties | The energy gap of the hexagonal CdSe obtained from the absorption measurement Eg (Γ6–Γ1 ) is Eg=1.84 eV, temperature coefficient -4.6×10-4 eV/K, and pressure coefficient 3.7×10-6 eV/kg–cm -2 .
The band structure of cubic CdSe is similar to that of GaAs. | | Uses | In photoconductors, semiconductors, photoelectric cells, and rectifiers; in phosphors. | | Uses | Dispersions with CdS (Aldrich products 208183, 217921) deposited on glass or Si substrates results in tunable red, yellow, or green fluorescent material. | | Uses | Cadmium selenide is used as a n-type semiconductor and its nanoparticles are used in laser diodes, opto-electronic devices, nanosensing, biomedical imaging and high efficiency solar cells. Since, it is transparent to infrared light, it finds application in photoresistors and windows for instruments utilizing IR light. | | Definition | ChEBI: Cadmium selenide is a cadmium molecular entity. | | Production Methods | A single crystal can be grown artificially through the vapor phase method or the Stockbarger method.
To obtain evaporated films, the source materials are heated in the alumina crucible with a nichrome heater. Crystal with a larger grain size is obtained at a higher substrate temperature.
The following corrosives are reported:
HNO3 (water cleansing after 2–3 s)
H2SO4 (water cleansing after 5–10 s)
18 N solution of 30 HNO3:0.1 HCl:20 H2SO4 (40℃, 8 s, cleansing with concentrated H2SO4)
3 HCl:1 HNO3
| | Application | Cadmium selenide is used as a photoconductive detector for λ: 0.3–0.72 mm (a sharp peak at 0.7 mm) at room temperature. The typical performances are as follows:
Peak detectivity: 2.1×1011 cm Hz1/2/watt, (λ: 0.7 mm)
Response time: ca. 12 ms
Intermittent frequency: 90 Hz
Dominant noise: current noise | | General Description | CdSe crystal can exist in solid hexagonal or cubic structure. CdSe behaves as an n-type semiconductor, with a bandgap of 1.74 eV (300K).1 | | Flammability and Explosibility | Not classified | | Structure and conformation | The space lattice of CdSe (Cadmium selenide) belongs to the two types of crystal system, the cubic system, with the zinc-blend type structure that has a lattice constant of a=0.605 nm, and the hexagonal system, with the wurtzite type structure that has lattice constants of a=0.430 nm and c=0.702 nm.
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| | CADMIUM SELENIDE Preparation Products And Raw materials |
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