Intrinsic semiconductors are pure semiconductors that are impurity-free.
The most common intrinsic semiconductors are Silicon (Si) and Germanium (Ge).
At room temperature, intrinsic semiconductor shows almost negligible conductivity.
The conductivity of an intrinsic semiconductor depends on temperature.
Reference Source:
[1] Intrinsic Semiconductor | Electrical4U. Electrical4U. Published February 24, 2012. Accessed February 17, 2022. https://www.electrical4u.com/intrinsic-semiconductor/
[2] Intrinsic Semiconductors – Undoped Semiconductors, Definition, Working Mechanism. BYJUS. Published December 6, 2017. Accessed February 17, 2022. https://byjus.com/physics/intrinsic-semiconductors/
[3] Difference Between Intrinsic and Extrinsic Semiconductor (with Comparison Chart) – Electronics Desk. Electronics Desk. Published February 5, 2019. Accessed February 17, 2022. https://electronicsdesk.com/difference-between-intrinsic-and-extrinsic-semiconductor.html