It is the most fundamental device element that forms the basis of many electronic devices such as pn diodes, optoelectronic devices like lightemitting diode and photodetector, field. By exploring the electrical properties of silicon, it is possible to acquire an understanding of the inner workings of the pn junction. Numerical analysis of semiconductor pn junctions using matlabtm. A diode is a 2 lead semiconductor that acts as a one way gate to electron flow. An analysis of pn junctions in piezoelectric semiconductors. I explain what happens when you put together a piece of n and ptype material. Theory of pn junction diodes theory of pn junction diode. Basic transport processes of a pn junction diode and transistor were. He semiconductor pn junction forms the basis of all devices being used in. The result is that some of the free electrons from the donor impurity atoms begi.
A pnjunction is formed when an ntype material is fused together with a ptype material creating a semiconductor diode. Semiconductors pn junction theory interview questions and answers pdf free download. A pn junction diode is formed by doping one side of a piece of silicon with a ptype dopant boran and the other side with a ntype dopant phosphorus. The behaviour of the pn junction with regards to the potential barriers width produces an asymmetrical conducting two terminal device, better known as the pn junction diode.
The pn junction provides satisfactory performance when operated within these limiting values. In its basic form a semiconductor diode is formed by making pn junction. Review of basic semiconductor and pn junction theory springerlink. Pn junction theory for semiconductor diodes basic electronics. Lec01 rrb je basic electronics introduction vikash sir adda247 technical 1 p. Shockley had the basic idea that only those electrons which manage to be. Chapter 1 semiconductor pn junction theory and applications. Pn homojunction non linear device rectifier devices composants redresseur 2 devices reach the same results. Pn junction diode baising and its vi characteristics. A forward biased pn junction diode has a resistance of the order of. The pn junction solidstate device theory electronics. Silicon a single silicon atom consists of fourteen negatively. Pdf numerical analysis of semiconductor pn junctions.
This is the basic construction of the pn junction diode. Review of basic semiconductor and pn junction theory mosfet. Introduction to electronics and applications youtube. The pn junction diode may get destroyed due to excessive heat if any of these values are exceeded.