Speaker
Description
Silicon carbide detectors exhibit good detection performance and are being considered for detection applications. However, the presence of surface electrode of detector limits the application of low-penetration particle detectors and photodetectors. A graphene-optimized 4H-SiC detector has been fabricated to expand the application of SiC detectors. Its electrical properties and the charge collection performance of α particles are reported. The effective doping concentration of lightly doped 4H-SiC epitaxial layer is about 4.5 × 1013cm-3, approaching the limit of the lowest doping level by the SiC epitaxial growth technique. The rising time of the graphene-optimized ring electrode detector is reduced by 24% at 200 V, compared to ring electrode detector. The charge collection efficiency (CCE) of graphene optimized 4H-SiC PIN is 99.22%. When the irradiation dose is 2× 1011 neq/cm2, the irradiation has a small impact on the rising time and uniformity of the rising time for the graphene-optimized 4H-SiC detectors. This study proves that graphene has a certain radiation resistance. Graphene-optimized 4H-SiC detectors can not only reduce the signal rise time, but also improve uniformity of signal rise time and stability of charge collection. This research will expand the application of detectors in fields such as X-ray, low energy ions, UV light detection, particle physics, medical dosimetry, the transient current technique (TCT) measurements, heavy-ion detection and nuclear reactor detection.
| Type of presentation (in-person/online) | online presentation (zoom) |
|---|---|
| Type of presentation (I. scientific results or II. project proposal) | I. Presentation on scientific results |
