Struct SolarCell 

pub struct SolarCell {
    pub i_ph: f64,
    pub i_0: f64,
    pub n_ideal: f64,
    pub temperature: f64,
    pub r_series: f64,
}

Simple single-diode solar cell model.

Computes the current–voltage (I–V) characteristic of an ideal single-diode solar cell using the Shockley equation:

I = I_ph - I_0 * (exp(q*V/(n*k*T)) - 1)

where I_ph is the photocurrent and I_0 is the dark saturation current.

Fields

i_ph: f64

Photocurrent [A]

i_0: f64

Dark saturation current [A]

n_ideal: f64

Ideality factor (1 for ideal)

temperature: f64

Temperature [K]

r_series: f64

Series resistance [Ω]

Implementations

impl SolarCell

pub fn new( i_ph: f64, i_0: f64, n_ideal: f64, temperature: f64, r_series: f64, ) -> Self

Create a new solar cell model.

pub fn thermal_voltage(&self) -> f64

Thermal voltage [V]: V_t = k*T/q.

pub fn short_circuit_current(&self) -> f64

Short-circuit current [A] (at V = 0): I_sc ≈ I_ph.

pub fn current_at_voltage(&self, v: f64) -> f64

Current [A] at terminal voltage v [V].

Neglects series resistance for simplicity (direct explicit form).

pub fn power_at_voltage(&self, v: f64) -> f64

Power [W] at terminal voltage v [V].

pub fn open_circuit_voltage(&self) -> f64

Open-circuit voltage [V]: solved numerically (bisection).

At V_oc: I = 0 → I_ph = I_0*(exp(V_oc/(n*V_t)) - 1). Exact: V_oc = n*V_t * ln(I_ph/I_0 + 1).

pub fn fill_factor(&self) -> f64

Fill factor (FF): FF = P_max / (I_sc * V_oc).

Estimated using the empirical Green formula: FF ≈ (v_oc - ln(v_oc + 0.72)) / (v_oc + 1) where v_oc = V_oc / V_t (normalised open-circuit voltage).

pub fn efficiency(&self, irradiance: f64, area: f64) -> f64

Efficiency: η = P_max / P_in where P_max = FF * I_sc * V_oc.

Arguments

• irradiance — incident irradiance [W/m²]
• area — cell area [m²]

Trait Implementations

impl Clone for SolarCell

fn clone(&self) -> SolarCell

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SolarCell

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

Formats the value using the given formatter.

impl Copy for SolarCell