Phototransistors
Source: YouTube Bipolar Phototransistors Phototransistors are semiconductor-based photodetectors that can be classified into bipolar phototransistors and field-effect phototransistors (photoFETs). Bipolar phototransistors operate on the principle of amplifying collector current when light hits the base-collector junction. This amplification results in higher responsivity compared to photodiodes. However, the detection bandwidth of bipolar phototransistors is limited by the […]