PN Junction Cross-Section

P-Type Holes (+)
N-Type Electrons (-)
Depletion Region
Electric Field →
Depletion region width varies with doping concentration and temperature

Measurements

Built-in Potential
0.65 V
Depletion Width
0.35 μm
Max Electric Field
1.85 V/μm

Parameters

Quick Presets

10¹⁶ cm⁻³
10¹⁶ cm⁻³
300 K
Equilibrium State: Study the PN junction at thermal equilibrium without external bias. Observe charge distribution, depletion region, and built-in electric field.

PN Junction Under Bias

P-Type Holes (+)
N-Type Electrons (-)
⚠️ AVALANCHE BREAKDOWN
Depletion Region
Electric Field →
No Bias Applied

Measurements

Current (A)
0.00 A
Voltage Drop
0.00 V
Depletion Width
0.35 μm
Power Dissipation
0.00 W

Bias Control

Quick Presets

0.0 V
10¹⁶ cm⁻³
10¹⁶ cm⁻³
300 K
Biasing Effects: Apply forward or reverse bias to observe changes in depletion region, electric field, and current flow.

Knowledge Challenges

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Click to reset all challenges with different questions from the question bank

🧠

Rapid Fire Quiz

Test your understanding of PN junction fundamentals with these quick questions!

📝

Fill in the Blanks

Complete these sentences about PN junction physics!

🔗

Match the Following

Match the terms with their correct definitions!

Terms

Depletion Region
Forward Bias
Avalanche Breakdown
Built-in Potential

Definitions

Area depleted of mobile carriers
P-region positive, N-region negative
Rapid current increase under high reverse voltage
Voltage barrier at thermal equilibrium
🎯

Advanced Concepts

Test your deeper understanding of semiconductor physics!

🧮

Calculation Challenge

Apply the physics equations to solve these numerical problems!

1

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Help & Information

Quick Guide:

Equilibrium: Study basic PN junction properties at thermal equilibrium.

Biasing: Apply forward/reverse bias to observe dynamic behavior.

Challenges: Test your knowledge with interactive exercises.

Key Concepts:

Depletion Region: Area depleted of mobile carriers

Built-in Potential: Voltage barrier at equilibrium

Forward Bias: P positive, N negative - allows current flow

Reverse Bias: P negative, N positive - blocks current

Tour Features:

🎯 Challenges: Interactive tasks to test your understanding

🏆 Achievements: Unlock badges as you progress

📊 Score System: Earn points for correct answers

💡 Hints: Get help when you're stuck