A Comparison Study of the Optical Measurement Sensitivity of the Phototransistor and Photodiode

Abstract

Depending on the amount of light they receive, the light-sensitive circuit elements generate electrical signals such as current, voltage, and resistance. Thus, these sensors are widely used in light measurement systems, light control systems, and opto-couplers. In this study underhand, the electrical values produced by the application of increasing light on the photodiodes and phototransistors are analysed. According to values obtained, the 9.44 standard deviation shows that photodiode has a better performance than phototransistor in terms of light sensitivity.