PDB-C150SMF

Photodiode or PDB-C150SMF is a kind of electrical signal output photodetector, which is often used for optoelectronic or optical instrument detection. In current application field, it is usually used in system control, imaging and instrumentation, communication receiver, photoelectric switch, imaging or motion detection and so on.

The photodiode was proposed in the early 1950s and then developed in order to replace the traditional photomultiplier. After decades of development, photodiode has become the most popular kind of photodetector. Especially PDB-C150SMF has a wide-range application including measuring the intensity or luminosity, integration, detection of motion, imaging and other activities.

PDB-C150SMF consists of four main parts: a sensitive cavity, a photoconductor, a metal plug, and a baffle. The sensitive cavity is the most important part of the photodiode, which can convert light into electric signal. When the light is converted, an electron-hole pair is generated in the sensitive cavity. The photoconductor is composed of a semiconductor material which has an intrinsic electrical rectification property, enabling it to detect very small light signals. The metal plug plays a role of protecting the sensitive cavity which is filled with an electrolytic solution. The baffle can reduce the effect of stray light and the output signal to be detected.

In addition to the four main components, PDB-C150SMF also has two types of electrodes, the anode and the cathode. The anode electrode is located at the end of the sensitive cavity, which is used to receive electron-hole pair. The cathode electrode is located at the bottom of the sensitive cavity and is used to deliver electric charges from the anode electrode.

The working principle of PDB-C150SMF is based on the photoconduction mechanism. When the photons with energy higher than the bandgap enter the photoresistor, the electron-hole pairs are generated in the semiconductor material. Then these electron-hole pairs are accelerated forward under the electric field and finally collected at the anode electrode. The current signal at the anode is proportional to the light intensity, which is then converted to the output voltage or current signal. During this process, the metal plug in the sensitive cavity can absorb the electric charges, ensuring that the measured signal is clean and reliable.

As can be seen, PDB-C150SMF has a wide range of application, which makes it suitable for various optoelectronic or optical instrument detection. This device is also low cost, low noise and because it has a good linearity can detect very small light signals. In conclusion, PDB-C150SMF is a reliable and precise photodiode used for optoelectronic or optical instrument detection.