Class CarrierConcentration

java.lang.Object
  |
  +--FermiDirac
        |
        +--CarrierConcentration

class CarrierConcentration

extends FermiDirac

implements PhysicsConstants

Class to calculate electron or hole concentrations

Field Summary

protected double	e0 The appropriate edge of the band gap (depending on whether the hole or electron concentration is being calculated).
protected double	holeMultiplier Modified premultiplier for holes, taking into account the mass ratio.
protected boolean	holes true if this CarrierConcentration object is calculating hole densities, false for electrons.
protected double	multiplier A premultiplier combining most of the constants
protected double	ratio The ratio between the effective mass of an electron and a hole.

Fields inherited from class FermiDirac

ef, t

Fields inherited from interface PhysicsConstants

e, e_over_k, epsilon, epsilon0, h, h_bar, k, m, q, si_rel_perm

Constructor Summary

CarrierConcentration(double e0, boolean holes)

Method Summary

double	evaluate(double x)
double	getE0()
double	getRatio() Returns the ratio between the effective masses of holes and electrons
void	setE0(double d)
void	setRatio(double ratio) Sets the ratio between the effective masses of holes and electrons.

Methods inherited from class FermiDirac

getEF, getT, setEF, setT

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

ratio

protected double ratio

The ratio between the effective mass of an electron and a hole.

multiplier

protected double multiplier

A premultiplier combining most of the constants

holeMultiplier

protected double holeMultiplier

Modified premultiplier for holes, taking into account the mass ratio.

holes

protected boolean holes

true if this CarrierConcentration object is calculating hole densities, false for electrons.

e0

protected double e0

The appropriate edge of the band gap (depending on whether the hole or electron concentration is being calculated).

Constructor Detail

CarrierConcentration

public CarrierConcentration(double e0,
                            boolean holes)

Parameters:

holes - true if the hole concentration is required, false for electrons

e0 - the applicable edge of the band gap - E_c for electrons, E_v for holes

Method Detail

evaluate

public double evaluate(double x)

Overrides:

evaluate in class FermiDirac

getE0

public double getE0()

setE0

public void setE0(double d)

getRatio

public double getRatio()

Returns the ratio between the effective masses of holes and electrons

setRatio

public void setRatio(double ratio)

Sets the ratio between the effective masses of holes and electrons. This causes the result of any hole density calculation to be multiplied by (ratio)^3/2.