Physics
Physics
Problem
Si is used more as semiconductor than Ge because: a. Si is cheaper than Ge b. It is found in abundance c. Less leakage of current in Si d. All of the aboveIntuitive explanation
Silicon's band gap is larger than germanium's, which means Si requires more energy to excite electrons into the conduction band—this keeps the intrinsic carrier concentration much lower at room temperature. Fewer thermally-generated charge carriers mean less unwanted leakage current and better control over doping, making Si devices more reliable and efficient for practical applications across a wider temperature range.
Intuitive explanation
Silicon's band gap is larger than germanium's, which means Si requires more energy to excite electrons into the conduction band—this keeps the intrinsic carrier concentration much lower at room temperature. Fewer thermally-generated charge carriers mean less unwanted leakage current and better control over doping, making Si devices more reliable and efficient for practical applications across a wider temperature range.