What is a silicon photodiode? The basic structure, characteristics, working principle, applications, detection methods, installation and development history of silicon photodiodes 2

3、 Working principle:

The working principle of silicon photodiodes is based on the internal photoelectric effect. When light shines on the window layer, the energy of photons excites the charge carriers in the PN junction, thereby changing the current of the PN junction. This current change can be measured and analyzed through external circuits.

4、 Application:

Silicon photodiodes are widely used in fields such as photoelectric measurement, optical communication, and photoelectric conversion. Specific applications include:

1. Optoelectronic measurement: used for light intensity measurement, spectral analysis, optical power detection, etc.

2. Optical communication: Used for receiving optical signals, optical sensors, and optoelectronic conversion devices in optical communication systems.

3. Optoelectronic conversion: used for solar cells, optocouplers, optoelectronic modulators, etc.

5、 Testing method:

The detection methods for silicon photodiode usually include the following:

1. Photocurrent detection method: detects the intensity of optical signals by measuring the photocurrent generated by silicon photodiodes under illumination. Usually, current amplifiers are used to amplify photocurrent signals and display and record them through oscilloscopes or data acquisition systems.diode

2. Photovoltage detection method: detects the intensity of light signals by measuring the photovoltaic voltage generated by silicon photodiodes under illumination. Compared with photocurrent detection method, photovoltaic detection method can provide higher sensitivity and dynamic range.diode