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- W4295168997 abstract "Photodetectors based on n ‐Mg 0.25 Zn 0.75 O/p‐Si heterojunctions are not only suitable for integration with existing semiconductor technology, but also circumvent the difficulty of stable p‐type doping in Mg x Zn 1– x O. However, the use of Si leads to photoresponse in the visible part of the light spectrum, which renders n ‐Mg x Zn 1– x O/p‐Si heterojunction devices unsuitable for visible blind UV photodetection. Herein, it is demonstrated that the visible photoresponse in the n ‐Mg 0.25 Zn 0.75 O/p‐Si photodetectors can be significantly suppressed by inserting a thin interlayer of MgO at the heterojunction. The MgO layer serves as a blocking layer for the drift of photo‐excited electrons from p‐Si to n ‐Mg 0.25 Zn 0.75 O, thereby limiting the visible photoresponse. It is found that on increasing the thickness of the MgO interlayer from 3 to 15 nm, the UV to visible rejection ratio increases from ≈25 to 200. This enhancement in the UV to visible rejection ratio demonstrates that n ‐Mg 0.25 Zn 0.75 O/p‐Si heterojunction devices with MgO interlayer are promising for visible‐blind UV photodetection applications." @default.
- W4295168997 created "2022-09-11" @default.
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- W4295168997 date "2022-09-23" @default.
- W4295168997 modified "2023-10-14" @default.
- W4295168997 title "Blocking Si‐Induced Visible Photoresponse in <i>n</i> ‐Mg <sub> <i>x</i> </sub> Zn <sub> 1– <i>x</i> </sub> O/p‐Si Heterojunction UV Photodetectors Using MgO Barrier Layer" @default.
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- W4295168997 doi "https://doi.org/10.1002/pssa.202200285" @default.
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