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Single-crystal diamond grown through high-power-density epitaxy used for a high-performance radiation detector
- Source :
- Science China Materials; 20240101, Issue: Preprints p1-6, 6p
- Publication Year :
- 2024
-
Abstract
- Radiation detectors are important device-level characterization tools of the carrier dynamics of diamond as an ultrawide-bandgap semiconductor. Herein, a high-quality single-crystal diamond was grown on a high-temperature and high-pressure diamond substrate through microwave plasma chemical vapor deposition. We achieved the enhancement of microwave power density by compressing a plasma ball and optimizing the carbon-hydrogen ratio (C/H) within the plasma and thus considerably diminished the impurity and dislocation densities of the diamond epilayer. The full width at half maximum of the X-ray (004) reflection rocking curve was 15 arcsec, and no impurity emission bands were detectable in the photoluminescence spectrum at room temperature (25°C). The radiation detector made from this 200-µm-thick diamond epifilm demonstrated an Ī±-particle response with a charge collection efficiency of 97.03% and energy resolutions of 2.1% for electrons and 97.86% and 1.5% for holes. Furthermore, the product of mobility and lifetime of electrons and holes reached 8 × 10ā5and 4.1 × 10ā4cm2Vā1, respectively. The epitaxial method reduces costs while fulfilling the stringent requirements of radiation detection for commercial applications.
Details
- Language :
- English
- ISSN :
- 20958226 and 21994501
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Science China Materials
- Publication Type :
- Periodical
- Accession number :
- ejs66643490
- Full Text :
- https://doi.org/10.1007/s40843-024-2955-x