How does a fast recovery diode achieve high-frequency rectification?

  What are the functions of fast recovery diodes in circuits? How can fast recovery diodes achieve high-frequency rectification?
  Fast recovery diodes belong to the high-frequency rectifier diodes in rectifier diodes. The reason why they are called fast recovery diodes is that ordinary rectifier diodes generally operate at low frequencies (such as a mains frequency of 50Hz), with operating frequencies below 3kHz.
  A rectifier diode is a semiconductor device used to convert alternating current into direct current. The most important characteristic of a diode is its unidirectional conductivity. In a circuit, current can only flow in from the positive pole of a diode and out from the negative pole. Usually it contains a PN junction with two terminals, positive and negative. The carriers in the P region are holes, while the carriers in the N region are electrons, forming a certain potential barrier between the P and N regions. When a positive voltage is applied to the P region relative to the N region, the potential barrier decreases

Storage carriers are generated near both sides of the barrier, which can pass through high currents and have a low voltage drop (typically 0.7V), known as forward conduction state. If the opposite voltage is applied, the barrier increases and can withstand high reverse voltage, resulting in a small reverse current (called reverse leakage current), which is called reverse blocking state. Rectifiers have obvious unidirectional conductivity, allowing fast recovery diodes to achieve high-frequency rectification.