Hello Physics Forums, This is my first time posting so apologies for any mistakes or misunderstand of forum etiquette here. I am having difficulty understanding a phenomenon known as "dark current" I've tried for a few hours to research it but most of what i find is very vague on the subject and still leaves me with many questions. There is very little information i can find in the way of explanations. I have a basic understand of semiconductor physics but i'm stumped at understanding exactly how dark current occurs in the physical sense. If anyone could shed some light on this for me, it would be greatly appreciated. Once again i apologise if i have posted in the wrong section or violated any forum regulations. Many thanks.