Which factor adversely affects the performance of a PIN diode when detecting light?

Increased temperature is a critical factor that adversely affects the performance of a PIN diode when detecting light. As the temperature rises, the intrinsic carrier concentration in the semiconductor material increases, leading to a higher level of noise and a reduction in the diode's overall sensitivity to light. This increased thermal energy can enhance the generation of charge carriers, which can lead to a degradation in the signal-to-noise ratio, impairing the diode's ability to accurately detect the incident light.

In low-temperature conditions, the performance of PIN diodes is generally improved, as thermal noise is minimized, allowing for better detection efficiency. Understanding the influence of temperature on the diode's responsiveness is crucial for optimizing its performance in various applications, including telecommunications and optical sensing.