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This is the wiki for Engineering's Solar Cells, Fuel Cells and Batteries.

Useful constants

Planck's constant h
6.626e-34 J*s
4.135e-15 eV*s

Reduced Planck constant
Dirac constant h-bar
1.054e-34 J*s
6.582e-16 eV*s

Mass of an electron m
3.109e-31 kg

Boltzmann constant k_B
1.381e-23 J/K
8.617e-5 eV/K

k_B*T at 300K
4.14e-21 J
2.58e-2 eV


Valence band density of states Nv
1.83e19 /cm^3

Conduction band density of states Nc
3.22e19 /cm^3

Band gap energy Eg at 300K
1.12 eV
Last modified:
Oct. 21, 2013, 9:54 p.m.