Molybdenum(IV) selenide

Synonym(s):Molybdenum (IV) selenide;Molybdenum diselenide;Molybdenum selenide

CAS NO.：12058-18-3
Empirical Formula: MoSe2
Molecular Weight: 253.89
MDL number: MFCD00014216
EINECS: 235-027-9
SAFETY DATA SHEET (SDS)
Update Date: 2023-10-21 14:47:53

What is Molybdenum(IV) selenide?

Description

Chemical exfoliation is one of the the most suitable routes towards large-scale production of nano-particles and nano-sheets. Using?N-methyl pyrrolidone (NMP) as a solvent, molybdenum diselenide (MoSe2) quantum dots can be prepared via chemical exfoliation - directly from molybdenum diselenide bulk powder.

Chemical properties

gray powder(s); used as a solid lubricant and lubricant film prepared by sputtering 99.9% pure material [HAW93] [STR93] [CER91]

Physical properties

The monolayer film of molybdenum diselenide, with a direct optical band gap of 1.48 eV and a photoluminescence peak at 840 nm, is highly suitable for optoelectronic applications. Moreover, when compared to MoS2, MoSe2 ultrathin films demonstrate a narrower bandgap, higher optical absorbance, and larger spin-splitting energy. These characteristics make MoSe2 films potentially superior to MoS2 for the utilization in tunnel FETs and optoelectronic devices.

The Uses of Molybdenum(IV) selenide

Molybdenum chalcogenide thin film transitors for solar cells are a rapidly expanding area of research and molybdenum selenide compounds play an important role in this research. The layered nature of MoSe₂ gives rise to several interesting applications such as field effect transistors ; piezoelectrics and substrates for self assembly

What are the applications of Application

Molybdenum(IV) selenide is a compound for research in electronics

Definition

Available as a 40-micron powder.

Preparation

Mo and Se were mixed at a molar ratio of 1:2, and molybdenum and selenium reacted at a temperature of 800 to 1150°C to form mainly molybdenum diselenide(MoSe2). High-quality monolayer films of molybdenum diselenide were successfully grown directly on SiO2/Si substrates using the chemical vapor deposition (CVD) method.

Synthesis

Chemical exfoliation, utilizing N-methyl pyrrolidone (NMP) as a solvent, allows for the large-scale production of nano-particles and nano-sheets. This method enables the direct preparation of molybdenum diselenide (MoSe2) quantum dots from bulk powder of molybdenum diselenide.?

Properties of Molybdenum(IV) selenide

Melting point:	>1200°C
Density	6.9 g/cm3
form	Powder
color	Dark gray
Specific Gravity	6
Water Solubility	Insoluble in water.
Exposure limits	ACGIH: TWA 10 mg/m3; TWA 3 mg/m3; TWA 0.2 mg/m3 NIOSH: IDLH 5000 mg/m3; IDLH 1 mg/m3; TWA 0.2 mg/m3
CAS DataBase Reference	12058-18-3
EPA Substance Registry System	Molybdenum selenide (MoSe2) (12058-18-3)
Bandgap	1.41 - 1.58 eV
Electronic properties	2D semiconductor

Safety information for Molybdenum(IV) selenide

Signal word	Danger
Pictogram(s)	Skull and Crossbones Acute Toxicity GHS06 Health Hazard GHS08 Environment GHS09
GHS Hazard Statements	H373:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P273:Avoid release to the environment. P314:Get medical advice/attention if you feel unwell.