Interactive PV Cell Simulator

Explore how photovoltaic cell parameters affect solar cell performance. Adjust irradiance, temperature, and resistances to see real-time changes in V-I and P-V curves.

This tool demonstrates the single-diode model of photovoltaic cells — a foundational concept in solar energy research. Learn how environmental conditions and device parameters influence cell behavior.

Simulator

Parameter Control & Real-Time Analysis

Quick Presets

1000 W/m²
25 °C
0.5 Ω
10000 Ω

💡 Quick Tip: Standard Test Condition (STC) is 1000 W/m² and 25°C. Try adjusting temperature to see how it affects Voc (voltage).

Voltage-Current (V-I) Curve

Power-Voltage (P-V) Curve

Performance Metrics

Open Circuit Voltage
0.00
V
Short Circuit Current
0.00
A/cm²
Maximum Power Point
0.00
W/cm²
Voltage @ MPP
0.00
V
Current @ MPP
0.00
A/cm²
Fill Factor
0.00
%

Single-Diode Equivalent Circuit

Light Iph D Rs + Rsh −
Single-diode model: Light generates current Iph, which flows through diode, resistances, and load

Mathematical Foundation

The simulator uses the single-diode equivalent circuit model, which accurately describes real PV cell behavior:

Single-Diode Equation:

I = Iph - Io(exp((V + I×Rs)/(n×Vt)) − 1) − (V + I×Rs)/Rsh

Where:
• I = Cell current
• Iph = Photocurrent (proportional to irradiance)
• Io = Reverse saturation current (exponential in temperature)
• V = Cell voltage
• Rs = Series resistance (contact, grid, bulk)
• Rsh = Shunt resistance (parallel leakage)
• n = Diode ideality factor (~1.3)
• Vt = Thermal voltage = k×T/q ≈ 0.026 V at 25°C
Key Parameters:

• Voc = Open-circuit voltage (V = 0)
• Isc = Short-circuit current (V = 0)
• Pmax = Maximum power = Vmpp × Impp
• FF = Fill Factor = Pmax / (Voc × Isc) × 100%
• Efficiency = Pmax / (G × Area) × 100%

How to Use This Tool

1. Start with Standard Conditions: Click "Standard Si" to set realistic values for a silicon solar cell under standard test conditions (1000 W/m², 25°C).

2. Explore Irradiance: Move the irradiance slider to see how cloud cover or seasonal changes affect current (Isc) — notice voltage (Voc) changes minimally.

3. Investigate Temperature: Increase temperature to observe how it reduces voltage — this is why solar panels perform worse on hot days despite higher irradiance.

4. Study Resistance: Increase series resistance (Rs) to see power losses at high current. Decrease shunt resistance (Rsh) to simulate a defective cell.

5. Compare Presets: Switch between materials (Si, CdTe) to understand how different bandgaps and materials affect V-I characteristics.

About This Tool

This interactive simulator is designed for:

  • Students learning photovoltaic fundamentals and device physics
  • Educators teaching solar energy courses and conducting demonstrations
  • Researchers exploring parameter sensitivity and material comparisons
  • Engineers gaining intuition for PV cell performance dependencies

Built with accuracy and pedagogy in mind, using the well-established single-diode model from photovoltaic literature.

Disclaimer: This tool provides educational simulations. Real PV cells have more complex behavior including temperature coefficients, spectral response, and frequency-dependent effects not captured here. For engineering calculations, consult manufacturer datasheets and specialized software.