Determinação experimental da constante de Boltzmann a partir da curva característica corrente-voltagem de um diodo

Abstract

We present in this work a didactic experimental activity with a diode, set up with affordable instruments, and that can be easily adapted for an undergraduate or a high school class. The activity described establishes the current I D -voltage V D characteristics of a diode from measurements of the potential difference V D on it and the current I D through it, for three different temperatures T = 0 °C, 23 °C, and 100 °C. From the experimental results: (i) we build up an algebraic expression for the current I D as a function of the voltage V D, and the temperature T, and (ii) we determine the value of the Boltzmann's constant k B, one of the physical fundamental constants.