RP Photonics logo
RP Photonics
Encyclopedia
Technical consulting services on lasers, nonlinear optics, fiber optics etc.
Profit from the knowledge and experience of a top expert!
Powerful simulation and design software.
Make computer models in order to get a comprehensive understanding of your devices!
Success comes from understanding – be it in science or in industrial development.
The famous Encyclopedia of Laser Physics and Technology – available online for free!
The ideal place for finding suppliers for many photonics products.
Advertisers: Make sure to have your products displayed here!
… combined with a great Buyer's Guide!
VLib part of the
Virtual
Library

p–i–n Photodiodes

<<<  |  >>>  |  Feedback

Buyer's Guide

The ideal place to find suppliers for photonics products: high-quality information, simple and fast, respects your privacy!

12 suppliers for p-i-n photodiodes are listed.

Your are not yet listed? Get your entry!

Ask RP Photonics for advice on photodiodes, e.g. the optimum choice of a photodiode and an electronic preamplifier.

Definition: photodiodes with a p–i–n semiconductor structure

German: PIN-Photodioden

Category: photonic devices

How to cite the article; suggest additional literature

A p–i–n photodiode, also called PIN photodiode, is a photodiode with an intrinsic (i) (i.e., undoped) region in between the n- and p-doped regions. Most of the photons are absorbed in the intrinsic region, and carriers generated therein can efficiently contribute to the photocurrent. In Figure 1, the electrodes are shown in black: the cathode is a flat electrode, whereas the anode has the form of a ring (of which two opposite parts are seen in the shown cross section). The positive pole of the (reverse) bias voltage is connected to the cathode. On top of the p region, there is an anti-reflection coating.

p–i–n photodiode

Figure 1: Schematic drawing of a p–i–n photodiode. The green layer is an anti-reflection coating.

Compared with an ordinary p–n photodiode, a p–i–n photodiode has a thicker depletion region, which allows a more efficient collection of the carriers and thus a larger quantum efficiency, and also leads to a lower capacitance and thus to higher detection bandwidth.

The most common p–i–n diodes are based on silicon. They are sensitive throughout the visible spectral region and in the near infrared up to ≈ 1 μm. At longer wavelengths, the absorption efficiency and thus the responsivity drops sharply, but the parameters of this cut-off depend on the thickness of the i region.

For longer wavelengths up to ≈ 1.7 μm (or with extended spectral response up to 2.6 μm), InGaAs p–i–n diodes are available, although at significantly higher prices (particularly for large active areas). Germanium p–i–n diodes can be an alternative.

The fastest p–i–n photodiodes have bandwidths of the order of tens of gigahertz. Their active areas typically have a diameter of only a few hundred microns. Some of them are available in fiber-coupled form and can be applied e.g. in receivers for optical fiber communications.

See also: photodiodes, metal–semiconductor–metal photodetectors

In the RP Photonics Buyer's Guide, 12 suppliers for p-i-n photodiodes are listed.

How do you rate this article?

Your general impression: don't know poor satisfactory good excellent
Technical quality: don't know poor satisfactory good excellent
Usefulness: don't know poor satisfactory good excellent
Readability: don't know poor satisfactory good excellent
Comments:

Found any errors? Suggestions for improvements? Do you know a better web page on this topic?

Spam protection: (enter the value of 5 + 8 in this field!)

If you want a response, you may leave your e-mail address in the comments field, or directly send an e-mail.

If you like our website, you may also want to get our newsletters!

If you like this article, share it with your friends and colleagues, e.g. via social media:

arrow

The Transparent Laser

The dream of each laser developer, and not only of each laser scientist: have a transparent laser, where you can look into any components and see e.g.

… and this at any location and time, with arbitrary resolution!

If you had this, finally you could

Absolutely marvelous, but only a dream?!?

Good news: such transparent lasers can be made! See our presentation:

presentation

– Show all banners –

– Get your own banner! –