Question

Calculate Vo when ppo=10^16cm^-3, pno=10^4cm^-3 and Vt=25mV.

(a) 69V

(b) 6.9V

(c) 0.69V

(d) 0.069V

This question was posed to me in class test.

I need to ask this question from Band Structure of an Open-Circuited p-n junction topic in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

Correct option is (c) 0.69V

To explain: Vo=VT  ln⁡(ppo/pno )

=25*10^-3*ln(10^16/10^4)

=0.69V.