Temperature-dependent structural and optical properties of SnS films

The

structural

and

optical properties

SnS

films

deposited on glass substrates have been studied at different temperatures under a vacuum of

10^{- 6} Torr

. At room temperature, the

SnS

films

showed orthorhombic

crystal structure

with

lattice parameters

a = 0.424

b = 1.107

, and

c = 0.3974 nm

. These

films

also showed an optical

band gap

\sim 1.47 eV

with a high absorption coefficient,

\sim 10^{5} {cm}^{- 1}

X-ray diffraction

studies at different temperatures

(100 - 598 K)

demonstrated that the

structure

of the

SnS

films

remains constant. However, the volume of the unit cell of

SnS

films

increased with the increase of temperature. It might be due to the expansion of the lattice. The effect of temperature

(4 - 303 K)

on the

band gap

SnS

films

is also marginal

(\sim 0.03 eV)

. It indicates that the

SnS

films

are optically stable even at very low temperatures due to its stabilized

structure.

Therefore,

SnS

films

offer an opportunity to be used as alternative semiconducting

materials

as active layers for the fabrication of optoelectronic devices.

Temperature-dependent structural and optical properties of SnS films

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