Struct DriftDiffusion 

pub struct DriftDiffusion {
    pub mu_n: f64,
    pub mu_p: f64,
    pub temperature_k: f64,
    pub v_sat_n: f64,
    pub v_sat_p: f64,
}

Drift-diffusion transport model for semiconductors.

Models carrier transport including mobility, diffusion, and velocity saturation.

Fields

mu_n: f64

Electron mobility in cm^2/(V·s).

mu_p: f64

Hole mobility in cm^2/(V·s).

temperature_k: f64

Temperature in K.

v_sat_n: f64

Saturation velocity for electrons in cm/s.

v_sat_p: f64

Saturation velocity for holes in cm/s.

Implementations

impl DriftDiffusion

pub fn new( mu_n: f64, mu_p: f64, temperature_k: f64, v_sat_n: f64, v_sat_p: f64, ) -> Self

Create a new drift-diffusion model.

pub fn silicon_300k() -> Self

Silicon at 300K with typical mobility values.

pub fn gaas_300k() -> Self

GaAs at 300K.

pub fn diffusion_coefficient_n(&self) -> f64

Electron diffusion coefficient via Einstein relation: D_n = mu_n * V_T.

pub fn diffusion_coefficient_p(&self) -> f64

Hole diffusion coefficient via Einstein relation: D_p = mu_p * V_T.

pub fn einstein_ratio(&self) -> f64

Verify Einstein relation: D/mu = k_B T / q.

pub fn electron_drift_velocity(&self, electric_field: f64) -> f64

Electron drift velocity with saturation effects.

v_d = mu * E / (1 + mu * |E| / v_sat)

pub fn hole_drift_velocity(&self, electric_field: f64) -> f64

Hole drift velocity with saturation effects.

pub fn electron_current_density( &self, n: f64, electric_field: f64, dn_dx: f64, ) -> f64

Electron current density (drift + diffusion) in A/cm^2.

J_n = q * n * mu_n * E + q * D_n * dn/dx

pub fn hole_current_density( &self, p: f64, electric_field: f64, dp_dx: f64, ) -> f64

Hole current density (drift + diffusion) in A/cm^2.

pub fn caughey_thomas_mobility( mu_min: f64, mu_max: f64, n_total: f64, n_ref: f64, alpha: f64, ) -> f64

Mobility with doping dependence (Caughey-Thomas model).

mu = mu_min + (mu_max - mu_min) / (1 + (N / N_ref)^alpha)

pub fn mean_free_path_n(&self) -> f64

Mean free path estimate from mobility in cm.

Trait Implementations

impl Clone for DriftDiffusion

fn clone(&self) -> DriftDiffusion

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DriftDiffusion

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for DriftDiffusion