Germanium Thin Film

Formula: Ge

Form: Thin Film

Material: Germanium

CAS Number: 7440-56-4

Commodity: Metals

Purity: 99.9999%

Support: Aluminium 6µm

Germanium thin films from Goodfellow offer a maximum purity of 99.9999% (6N), ensuring high performance in optical and electronic applications. Germanium’s semiconductor properties, infrared transparency, and high refractive index make it indispensable in fiber optics, solar cells, and infrared optics. Specific uses include radiation detectors and advanced photovoltaic systems. In research, germanium’s ultra-purity supports precision experiments in particle physics and photonics innovation. Its role in enabling cutting-edge technologies underscores its significance across industries. Germanium’s unique properties also make it crucial for developing high-efficiency multi-junction solar cells and advanced optical communication systems.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

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Tolerances

Thin Film

Thickness		±30%

Sizes

Linear dimension		±20%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	32
Crystal structure	Diamond
Electronic structure	Ar 3d¹⁰ 4s² 4p²
Valences shown	2,4
Atomic weight( amu )	72.59
Thermal neutron absorption cross-section( Barns )	2.3
Photo-electric work function( eV )	4.8
Natural isotope distribution( Mass No./% )	72/ 27.4
Natural isotope distribution( Mass No./% )	73/ 7.8
Natural isotope distribution( Mass No./% )	76/ 7.8
Natural isotope distribution( Mass No./% )	70/ 20.5
Natural isotope distribution( Mass No./% )	74/ 36.5
Atomic radius - Goldschmidt( nm )	0.139
Ionisation potential( No./eV )	4/ 45.7
Ionisation potential( No./eV )	3/ 34.22
Ionisation potential( No./eV )	1/ 7.90
Ionisation potential( No./eV )	5/ 93.5
Ionisation potential( No./eV )	2/ 15.93

Mechanical Properties

Element	Value
Hardness - Mohs	6.25
Material condition	Polycrystalline
Poisson's ratio	0.32
Bulk modulus( GPa )	73.9
Tensile modulus( GPa )	79.9

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	46x10⁶@22@22°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	33.9

Physical Properties

Element	Value
Boiling point( C )	2830
Density( gcm⁻³ )	5.32@20°C

Thermal Properties

Element	Value
Melting point( C )	937.4
Latent heat of evaporation( J g⁻¹ )	4516
Latent heat of fusion( J g⁻¹ )	465
Specific heat( J K⁻¹ kg⁻¹ )	322@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	60.2@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	5.75@0-100°C

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Germanium Thin Film

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Material Properties for Metals