Below Threshold Does Not Conduct - Semiconductor Physics: Bands, Doping, and Junctions Step by Step

Below the toy barrier, the diode threshold rejects. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Below-threshold source energy is smaller

Charge 2 coulombs through 2 volts supplies 4 joules.

E_{\mathrm{source}}=2\cdot 2=4\ \mathrm{J}

Below the barrier does not conduct in the toy model

Four joules is below the 6 joule barrier, so accepted is 0.

4\ \mathrm{J}<6\ \mathrm{J},\quad \mathrm{accepted}=0