Tungsten Selenide (WSe2) PLD Target

Introduction to Tungsten Selenide

Tungsten Selenide (WSe2) is a layered transition metal dichalcogenide (TMD) with a hexagonal crystal structure. It is a semiconductor material with a bandgap of approximately 1.5 eV, making it suitable for various electronic and optoelectronic applications. WSe2 has been widely studied due to its unique electronic and optical properties, which are strongly influenced by its layered structure.

What are the Magnetic and Chemical Properties of Tungsten Selenide?

WSe2 exhibits a diamagnetic behavior, meaning it has no magnetic properties. However, in the presence of an external magnetic field, it can exhibit a weak paramagnetic response. In terms of chemical properties, WSe2 is chemically stable in air and water, making it suitable for device fabrication and integration.

How do the Magnetic and Chemical Properties of Tungsten Selenide Compare to Similar Materials?

Compared to other TMDs such as MoS2 and WS2, WSe2 has a weaker diamagnetic response and higher chemical stability. However, it has a lower optical absorption coefficient compared to MoS2, making it less suitable for optoelectronic applications.

Crystal Structure of Tungsten Selenide

WSe2 has a hexagonal crystal structure with a space group of P6m2. It consists of layers of W atoms sandwiched between two layers of Se atoms, with weak van der Waals forces holding the layers together. This layered structure gives rise to its unique electronic and optical properties.

Typical Substrates with a Good Lattice Match Used for Epitaxial Growth of Tungsten Selenide

Tungsten Selenide can be grown epitaxially on various substrates, including sapphire, SiO2/Si, and graphene. However, the best lattice match is achieved on substrates with a hexagonal lattice structure, such as graphene and hexagonal boron nitride (h-BN).

List 5 Other Similar Thin Film Materials to Tungsten Selenide

1. Molybdenum Diselenide (MoSe2)
2. Tungsten Diselenide (WSe2)
3. Molybdenum Disulfide (MoS2)
4. Tungsten Disulfide (WS2)
5. Black Phosphorus (BP)