On a discussion of extrinsic semiconductors have been mentioned that there are two types of semiconductor material namely extrinsic semiconductor type N andtype P. Before continuing your reading activities, help us to click the image on the side. On the semiconductor material of an atomic type is strongly influenced by the donors. On semiconductor of note that the 4A is the number of electronsand protons have almost the same so are classified into of semiconductor material (silicone, gemanium, etc.).

This is a N type semiconductor merger between atoms of the element class 4Awith elements in Group II and III thus forming new compounds in the form of a semiconductor. N-type semiconductor is a semiconductor material which the majority carriers are electrons.

Doping concentration is very small, with a comparison of impurity atoms(foreign) atoms of the original ranges from 1:100 to 1:1 million with the purpose of this is so that the ingredients are rich in a type of pembawamuatan (free electron or hole only) and to increase the electrical conductivity.

N type semiconductor is a semiconductor eksintrik, obtained from the intrinsicsemiconductor littered with foreign atoms that are like 5-Valent USA, Pb, p.comparison of impurity atoms Because atoms of the original is very small, then any impurity atoms are surrounded by (foreign) atoms. The 5 valence electronsfrom the atoms of the polluter is not bound in Covalent bonds so that it becomes free electrons.
Thus on this material the number of free electrons will increase number of atoms of the pengotornya so that the free electrons becomemajority charge carriers and the hole (that is formed due to the temperature) tominority charge carriers. Because these carriers are the electron free, free electrons are negatively charged, then semiconductors formed named semiconductor type n. in this case N short for negative words, i.e. the type of loadsof these. So does not mean that these negatively charged Semiconductor. Thissemiconductor remained neutral. Because atomic impurity gives the excesselectrons in a covalent bond, it is called the donor (donor atoms). After the donor gives an excess of electrons, positive ions, then it would be.

The State ties and ribbons N type semiconductor power If the concentration offree electrons in the N-type semiconductor is stated with Nn being revealed with holenya Pn concentration and concentration of donor atoms arerepresented by a Nd then apply:

According to the law of mass action result times the concentration of charge carriers is positive with a negative charge carriers in thermal equilibrium is aconstant that does not depend on donors and
aseptor the magnitude of N2 ^ 2. Then based on this law applies:

Types of electrical conductivity can be searched from the following relations:

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