Authors: Pei Li, Song Li, Péter Udvarhelyi, Bing Huang, Adam Gali
Published: 2025-05-28
Source: Full article
AbstractPoint defects may introduce defect levels into the fundamental bandgap of the host semiconductors that alter the electrical properties of the material. As a consequence, the in‐gap defect levels and states automatically lower the threshold energy of optical excitation associated with the optical gap of the host semiconductor. It is, therefore, a common assumption that solid‐state defect emitters in semiconductors ultimately alter the conductivity of the host. This study demonstrate, on a particular defect in 4H silicon carbide, that an unrecognized class of point defects exists that are optically active but electrically inactive in the ground state.