Junction Bias Barrier Three-Row Scan - Semiconductor Physics: Bands, Doping, and Junctions Step by Step

Reverse, zero, and forward bias rows show the barrier ledger. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Reverse bias raises the barrier row

Charge 2 C and built-in voltage 3 V with applied voltage 1 V give effective voltage 4 V and barrier energy 8 J.

V_{\mathrm{eff}}=3 + 1=4\ \mathrm{V},\quad E=qV=2\cdot 4=8\ \mathrm{J}

Zero applied bias leaves the built-in row

Charge 2 C and built-in voltage 3 V with applied voltage 0 V give effective voltage 3 V and barrier energy 6 J.

V_{\mathrm{eff}}=3 - 0=3\ \mathrm{V},\quad E=qV=2\cdot 3=6\ \mathrm{J}

Forward bias lowers the barrier row

Charge 2 C and built-in voltage 3 V with applied voltage 2 V give effective voltage 1 V and barrier energy 2 J.

V_{\mathrm{eff}}=3 - 2=1\ \mathrm{V},\quad E=qV=2\cdot 1=2\ \mathrm{J}