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PN Junction: Formation & Structure

In this section, the PN junction, which forms the basis of photovoltaic devices, is introduced. Silicon (Si) is the most common element used in the construction of photovoltaic solar cells. Recall that the addition of impurities to pure silicon (or other semiconductors) can change the conduction properties and form p …

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PN Junction Diodes and BJT Transistors: an Introduction

This article provides a brief introduction to PN junction diodes and BJT transistors. Doping Silicon: N-Type and P-Type Semiconductors PN junctions play an important role in semiconductor fabrication for integrated circuits. An undoped silicon with a valence of four has an intrinsic concentration of ${{n}_{i}}=1.1\times {{10}^{16}}\text{ }carriers/{{m}^{3}}$ at room temperature. …

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