The price of solar panels power application technology - P and small solar street lamp type

1. Solar panel prices n-type semiconductor if in pure silicon crystal doped impurity phosphorus (a small amount of 5 price Or arsenic, antimony, etc. ) , due to the number of phosphorus atoms were much less than the silicon atoms, hence the entire structure basically remain unchanged, just some location on the silicon atom replaced by phosphorus atoms



1. Solar panel prices n-type semiconductor 【 Also known as electronic semicoductor. 】

if in pure silicon crystal doped impurity phosphorus (a small amount of 5 price Or arsenic, antimony, etc. ) , due to the number of phosphorus atoms were much less than the silicon atoms, hence the entire structure basically remain unchanged, just some location on the silicon atom replaced by phosphorus atoms. Because the phosphorous has 5 valence electrons, so a phosphorus atoms and the adjacent four silicon atoms form a covalent bond 【 Covalent bond ( covalent bond） , is one of the types of chemical bonds, two or more of the outer electrons of the atoms together to use them, ideally reach the state of the electron saturation of the relatively stable chemical structure is called a covalent bond, or covalent bonds between atoms by sharing electrons formed by the interaction. 】 , also 1 extra valence electrons, the valence electrons are not bound in a covalent bond, only attracted by the phosphorus nuclei, so it is a much smaller force binding, it is easy to break free of phosphorus nuclei attract and become free electrons, which greatly increased the number of silicon crystal electron carrier. Because the price of 5 impurity atoms can provide a free electrons, mixed with 5 price of impurity atoms is known as the donor; So a price of 4 semiconductor impurities mixed with 5 price, become electrically conductive type of semiconductor, also known as N type semiconductor. In this kind of n-type semiconductor materials, in addition to the result of the doped impurity a large number of free electrons, and produce a small amount of electronic - due to thermal excitation Hole pair. Hole relative to the number of the number of electrons is very few, so called the hole minority carrier, and electronic called majority carrier.

　2. P type semiconductor 【 P type semiconductor, also known as hole type semiconductor. 】

also, price of solar panels if in pure silicon crystal doped can capture electronic 3 price of impurities, such as boron 【 About 200 BC, ancient Egypt, Rome, the king of Babylon had made of boron the sand glass and welding gold. 】 ( Or aluminum, gallium or indium, etc. ) , the price of these 3 only three valence electrons, the outermost layers of the impurity atom when it and the adjacent silicon atoms form covalent bonds, also lacks a valence electrons, and therefore to appear on a covalent bond a hole, the hole can accept foreign electronic filling. And silicon atoms near total of valence electrons under thermal excitation, it is easy to transfer to the position, so the covalent bonding on the silicon atoms in a cavity, boron atoms after accepting a valence electrons also boron form negatively charged ions. In this way, each boron atoms can accept a valence electrons, in near a hole at the same time, thereby greatly increasing the number of silicon crystal hole carrier. Due to the price of 3 is referred to as acceptor impurity atoms can accept electronic impurities, so the impurities mixed with 3 price 4 price of semiconductor, also known as the P type semiconductor. In the P type semiconductor, of course, in addition to impurities mixed people produce a large number of holes, thermal excitation can produce a small amount of electronic - Hole pair, but relatively speaking, the number of electrons is much smaller. In contrast to the n-type semiconductor, for P type semiconductor cavitation street lamp controller is majority carrier, and electronics for the minority carrier.