intrinsic semiconductor

https://doi.org/10.1351/goldbook.08833
Semiconductor in which mobile charge carriers are generated solely by thermal excitation of electrons.
Notes:
  1. Intrinsic semiconductor is free of dopants, so that it has no energy states in the bandgap.
  2. Pure conjugated polymers such as poly(ethene-1,2-diyl) or poly(pyrrole-2,5-diyl) and other polymers with delocalized valence electrons such as polysilanes are examples of intrinsic semiconductors.
Source:
PAC, 2022, 94, 15. (Glossary of terms relating to electronic, photonic and magnetic properties of polymers (IUPAC Recommendations 2021)) on page 36 [Terms] [Paper]