Semiconductor Basics

Appendix AUseful Constants

A.1 Fundamental Physical Constants

Constants	Symbol	MKS	Units	CGS	Units
Bohr radius	a o	5.30 × 10−11	m	5.30 × 10−9	cm
Boltzmann constant	k b	1.38 × 10−23	J K–1	1.38 × 10−16	Erg K–1
Charge of electron	e	1.60 × 10−19	C
Electron mass	m e	9.11 × 10−31	kg	9.11 × 10−28	g
Electron‐volt (energy)	Ve	1.6 × 10−19	J	1.6 × 10−12	Erg
Permeability of free space	μo	1.26 × 10−6	H m–1	1.26 × 10−8	H cm–1
Permittivity of free space	ε o	8.85 × 10−12	F m–1	8.85 × 10−14	F cm–1
Plank constant	h	6.63 × 10−34	J s	6.63 × 10−27	Ergs
Proton mass	m c	1.67 × 10−27	kg	1.67 × 10−24	g
Rydberg constant	R oo	1.1 × 107	m−1
Speed of light	c	3.00 × 108	m s−1	3.00 × 1010	cm s−1
Wavelength corresponding to 1 eV	λ	1.24 × 10−6	m	1.24 × 10−4	cm

A.2 Basic Units

Quantity	Name	Symbol
Electric current	Ampere	A
Length	Meter	m
Mass	Kilogram	kg
Temperature	Kelvin	K
	Centigrade	°C
Time	Second	s

A.3 Derived Units

Quantity	Name	Symbol	MKS
Acceleration	a	m s−2
Capacitance	Farad	F	C V−1
Conductance	Siemens	S	A V−1
Conductivity	σ	A V−1 m−1
Electric charge	Coulomb	C or Q	A s
Electric field	E	V m−1
Electrical potential	Volt	V or v	kg m2 s−2 A−1
Energy or work	Joule	J	kg m2 s−2
Force	Newton	N	kg m s−2
Frequency	Hertz	Hz	s−1
Inductance	Henry	H	V s A−1
Luminous flux	Lumen	lm	kg m2 s−3
Magnetic flux	Weber	Wv	V s
Power	Watt	W	kg m2 s−3
Resistance	Ohms	Ω	V A−1
Resistivity	ρ	V A−1 m−1
Velocity	v	m s