- #1
Oz Alikhan
- 12
- 0
Good Morning,
The equations under investigation:
Electrons: J = enμE + eD(dn/dx)
Holes: J = epμE - eD(dp/dx)
n or p = concentration of electrons or holes respectively
D = diffusion constant
μ = mobility
The question in mind is as follows:
If holes are traveling in the direction on conventional current, then shouldn't the drift velocity for holes be fully negative, i.e. -epμE - eD(dp/dx)?
I understand by definition that, μ = mobility, is the absolute value of drift velocity (speed) over the electric field hence the direction is lost in the process (or is the same for both a hole and an electron). Therefore, shouldn't the expression for holes written above also technically factor in a negative sign corresponding to the hole drift 'velocity' part of the equation?
Please dispel my confusion lest more holes puncture brain.
The equations under investigation:
Electrons: J = enμE + eD(dn/dx)
Holes: J = epμE - eD(dp/dx)
n or p = concentration of electrons or holes respectively
D = diffusion constant
μ = mobility
The question in mind is as follows:
If holes are traveling in the direction on conventional current, then shouldn't the drift velocity for holes be fully negative, i.e. -epμE - eD(dp/dx)?
I understand by definition that, μ = mobility, is the absolute value of drift velocity (speed) over the electric field hence the direction is lost in the process (or is the same for both a hole and an electron). Therefore, shouldn't the expression for holes written above also technically factor in a negative sign corresponding to the hole drift 'velocity' part of the equation?
Please dispel my confusion lest more holes puncture brain.