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Photodiodes & Phototransistors

Photodiodes and Phototransistors

Excelitas utilizes Silicon and InGaAs materials for their photodiodes to provide detection from 220 nm to 1700 nm. These devices are offered in a variety of sizes to meet customer sensitivity and speed requirements.

Phototransistors are examples of photodiode-amplifier combinations integrated within a single silicon chip.

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Photodiodes are unique among light detectors in that when illuminated, they generate an output which is proportional to light level. They are solid state light detector that consists of a shallow diffused P-N junction with connections provided to the outside world. When the top surface is illuminated, photons of light penetrate into the silicon to a depth determined by the photon energy and are absorbed by the silicon generating electron-hole pairs. The electron-hole pairs are free to diffuse (or wander) throughout the bulk of the photodiode until they recombine. The average time before recombination is the “minority carrier lifetime”.

Phototransistors are solid state light detectors that possess internal gain. This makes them much more sensitive than photodiodes of comparably sized area. These devices can be used to provide either an analog or digital output signal. The phototransistor can be viewed as a photodiode whose output photocurrent is fed into the base of a conventional small signal transistor. While not required for operation of the device as a photodetector, a base connection is often provided allowing the designer the option of using base current to bias the transistor. The typical gain of a phototransistor can range from 100 to over 1500.

Product List
  
  
  
  
CR50DECERLED Ceramic SMD Photo PIN Diode (Si), Wide Viewing AngleDatasheet
CR50TECERLED Ceramic SMD Photo Transistor, Wide Viewing AngleDatasheet
VTB100AHSilicon photodiode in plastic molded sidelooker package, blue enhanced,very low dark current, wide field of viewApplication NoteDatasheet
VTB1012BHSilicon photodiode in hermetic TO-46 flat window package with IR blocking filter , blue enhanced, very low dark current, intermediate field of viewApplication NoteDatasheet
VTB1012HSilicon photodiode in hermetic TO-46 flat window package, blue enhanced, very low dark current, intermediate field of viewApplication NoteDatasheet
VTB1013HSilicon photodiode in hermetic TO-46 flat window package, blue enhanced, very low dark current, intermediate field of viewApplication NoteDatasheet
VTB1013BHSilicon photodiode in hermetic TO-46 flat window package with IR blocking filter , blue enhanced, very low dark current, intermediate field of viewApplication NoteDatasheet
VTB1112HSilicon photodiode in hermetic TO-46 lensed package, blue enhanced, very low dark current, narrow field of viewApplication NoteDatasheet
VTB1113HSilicon photodiode in hermetic TO-46 lensed package, blue enhanced, very low dark current, narrow field of viewApplication NoteDatasheet
VTB1112BHSilicon photodiode in hermetic TO-46 lensed package with IR blocking filter, blue enhanced, very low dark current, narrow field of viewApplication NoteDatasheet
VTB1113BHSilicon photodiode in hermetic TO-46 lensed package with IR blocking filter, blue enhanced, very low dark current, narrow field of viewApplication NoteDatasheet
VTB4051HSilicon photodiode on ceramic substrate coated with clear epoxy, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB5051HSilicon photodiode in hermetic TO-5 flat window package, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB5051UVHSilicon photodiode in TO-5 hermetic package with UV transmiting flat window, UV enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB5051BHSilicon photodiode in hermetic TO-5 flat window package with IR blocking filter, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB5051JHSilicon photodiode in a three lead TO-5 hermetic package with flat window, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB5051UVJHSilicon photodiode in three lead TO-5 hermetic package with UV transmiting flat window, UV enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061HSilicon photodiode in hermetic TO-8 flat window package, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061CIEHSilicon photodiode in hermetic TO-8 flat window package with human eye response filter, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061BHSilicon photodiode in hermetic TO-8 flat window package with IR blocking filter, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061UVHSilicon photodiode in TO-8 hermetic package with UV transmiting flat window, UV enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061JHSilicon photodiode in a three lead TO-8 hermetic package with flat window, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB6061UVJHSilicon photodiode in three lead TO-8 hermetic package with UV transmiting flat window, UV enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB8341HSilicon photodiode on ceramic substrate coated with clear epoxy, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTP8440HSilicon photodiode on 8 mm ceramic substrate coated with epoxy, fast response, low dark current, wide field of view.Application NoteDatasheet
VTB8440HSilicon photodiode on 8mm ceramic substrate coated with clear epoxy, blue enhanced, very low dark current, wide field of viewApplication Note
VTB8441HSilicon photodiode on 8mm ceramic substrate coated with clear epoxy, blue enhanced, very low dark current, wide field of viewApplication Note
VTB8440BHSilicon photodiode on 8mm ceramic substrate coated with IR blocking filter, blue enhanced, very low dark current, wide field of viewApplication Note
VTB8441BHSilicon photodiode on 8mm ceramic substrate coated with IR blocking filter, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
VTB9412HSilicon photodiode on 6mm ceramic substrate coated with clear epoxy, blue enhanced, very low dark current, wide field of viewApplication NoteDatasheet
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