The diode consists of a PN junction, and the properties of the PN junction lead to the unidirectional conduction properties of the diode.
Near the interface of P-type and N-type semiconductors, due to the large concentration of free electrons in N-type region, negatively charged free electrons will diffuse from N-region to P-region with low electron concentration. As a result of diffusion, the side close to P-region in PN junction is negatively charged, while the side close to N-region is positively charged, thus forming an electric field pointing to P-region in N region, namely the electric field in PN junction. The internal electric field will also block the continued diffusion of most carriers, also known as the barrier layer.
In fact, diodes that conduct electricity in one direction are widely used. In life, there are numerous examples of one-way conduction. For example, the one-way gate when entering the subway entrance is also equivalent to the effect of a diode, the positive guide is on, the reverse is not on. If you insist on the reverse pass, it may cause damage to the gate.
The above is the related introduction of the one-way conduction characteristics of diodes. I hope to help you. There is a need for diodes and other electronic components of friends can contact us oh ~
Why is a diode unidirectional
Diode is a highly common component in electronic circuit, commonly used, diode characteristics are positive pilot pass, reverse cut-off.
When a positive voltage is added to the positive end of the diode and a negative voltage is added to the negative end, the diode will be switched on and a current will flow through the diode. When a negative voltage is added to the positive end of the diode, the diode will be cut off and the current will no longer flow through the diode. This is commonly referred to as the diode single - pass characteristic.
As for why? Today, Phoenix-1622150 Xiaobian to explain to you.
The diode consists of a PN junction, and the properties of the PN junction lead to the unidirectional conduction properties of the diode.
Near the interface of P-type and N-type semiconductors, due to the large concentration of free electrons in N-type region, negatively charged free electrons will diffuse from N-region to P-region with low electron concentration. As a result of diffusion, the side close to P-region in PN junction is negatively charged, while the side close to N-region is positively charged, thus forming an electric field pointing to P-region in N region, namely the electric field in PN junction. The internal electric field will also block the continued diffusion of most carriers, also known as the barrier layer.
In fact, diodes that conduct electricity in one direction are widely used. In life, there are numerous examples of one-way conduction. For example, the one-way gate when entering the subway entrance is also equivalent to the effect of a diode, the positive guide is on, the reverse is not on. If you insist on the reverse pass, it may cause damage to the gate.
The above is the related introduction of the one-way conduction characteristics of diodes. I hope to help you. There is a need for diodes and other electronic components of friends can contact us oh ~
The diode consists of a PN junction, and the properties of the PN junction lead to the unidirectional conduction properties of the diode.
Near the interface of P-type and N-type semiconductors, due to the large concentration of free electrons in N-type region, negatively charged free electrons will diffuse from N-region to P-region with low electron concentration. As a result of diffusion, the side close to P-region in PN junction is negatively charged, while the side close to N-region is positively charged, thus forming an electric field pointing to P-region in N region, namely the electric field in PN junction. The internal electric field will also block the continued diffusion of most carriers, also known as the barrier layer.
In fact, diodes that conduct electricity in one direction are widely used. In life, there are numerous examples of one-way conduction. For example, the one-way gate when entering the subway entrance is also equivalent to the effect of a diode, the positive guide is on, the reverse is not on. If you insist on the reverse pass, it may cause damage to the gate.
The above is the related introduction of the one-way conduction characteristics of diodes. I hope to help you. There is a need for diodes and other electronic components of friends can contact us oh ~