![]() For Lead (II) sulfide material, the electromagnetic spectrum wavelength range will be For Indium gallium arsenide material, the electromagnetic spectrum wavelength range will be (800-2600) nm.For Germanium material, the electromagnetic spectrum wavelength range will be (400-1700) nm.For silicon material, the electromagnetic spectrum wavelength range will be (190-1100) nm.The required materials to make a photodiode and the range of electromagnetic spectrum wavelength range includes the following The linearity of the diode is good with respect to incident light.The main features of these diodes include the following. These diodes are widely used in applications where the detection of the presence of light, color, position, the intensity is required. The performance parameters of photodiode include responsivity, quantum efficiency, transit time or response time. The different parameters to be considered while selecting photodiode include noise, wavelength, reverse bias constraints, gain, etc. The selection of this diode can be done based on the application. Please refer to this link to know more about the Schottky diode.Įach type of photodiode has its own benefits and drawbacks. Thus, this kind of photodiode is frequently utilized in high bandwidth (BW) optical communication systems like fiber-optic links. The Schottky photodiode uses the Schottky diode, and it includes a small diode junction that means, there is small junction capacitance so, it operates at high speeds. Please refer to this link to know more about the Avalanche diode. So this technology is not appropriate for all applications. This kind of diode is used in low light areas due to its high gain levels. Please refer to this link to know more about the PIN diode. This diode gathers the light photons more powerfully as compared with standard PN photodiode because the wide intrinsic area between the P and N regions allows for more light to be collected, and in addition to this, it also offers a lower capacitance. PIN PhotodiodeĪt present, the most commonly used photodiode is a PIN type. Please refer to this link to know more about the PN diode. This diode is quite small but its sensitivity is not great as compared with others. The photodetection mainly happens in the depletion region of the diode. As compared with other types, its performance is not advanced, but at present, it is used in several applications. The first developed type of photodiode is the PN type. The types of photodiodes can be classified based on their construction and functions as follows. The working of different types of photodiodes works in a slightly different way, but the basic operation of these diodes remains the same. Photocurrent flows in the reverse direction.Īlthough there are numerous types of photodiode available in the market and they all work on the same basic principles, though some are improved by other effects. Under the forward bias condition, the conventional current will flow from the anode to the cathode, following the arrow in the diode symbol. See the following schematic diagram for the anode and cathode sides. The smaller end of the diode is the cathode terminal, while the longer end of the diode is the anode terminal. They have two terminals coming from the end. Some photodiodes will look like a light-emitting diode. Several diodes intended for use exactly as a photodiode will also use a PIN junction somewhat than the usual PN junction. Photodiodes are alike to regular semiconductor diodes, but that they may be either visible to let light reach the delicate part of the device. These diodes have a slow response time when the surface area of the photodiode increases. It comprises optical filters, built-in lenses, and also surface areas. A photodiode is one type of light detector, used to convert the light into current or voltage based on the mode of operation of the device.
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