![Phototransistors](https://mobicheckin-assets.s3.amazonaws.com/uploads/events/647747350824f13e47fd4158/guests/65a555de756a0b093c291b3a/guest_products/65c4a47cad3d9a49d57c56f9/illustration/medium_fototransistor.jpg)
Phototransistors are semiconductor devices that amplify the current generated by the photovoltaic effect using junctions; these optical components offer similar performance to the photodiode but are much more sensitive to light. Specifically, a phototransistor is a semiconductor device that can detect light levels and alter the current flow between the emitter and collector according to the amount of light received.