High-performance 4H-SiC based metal-semiconductor-metal ultraviolet photodetectors with AlO SiO films
Applied Physics Letters, ISSN: 0003-6951, Vol: 92, Issue: 25
2008
- 40Citations
- 15Captures
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Article Description
4H-silicon carbide (SiC) metal-semiconductor-metal (MSM) ultraviolet (UV) photodetectors with AlO SiO (A/S) films employed as antireflection/passivation layers have been demonstrated. The devices showed a peak responsivity of 0.12 AW at 290 nm and maximum external quantum efficiency of 50% at 280 nm under 20 V electrical bias, which were much larger than conventional MSM detectors. The redshift of peak responsivity and response restriction effect were found and analyzed. The A/S/4H-SiC MSM photodetectors were also shown to possess outstanding features including high UV to visible rejection ratio, large photocurrent, etc. These results demonstrate A/S/4H-SiC photodetectors as a promising candidate for OEIC applications. © 2008 American Institute of Physics.
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