Ultrawide-bandgap (6.14 eV) (AlGa)2O3/Ga2O3 heterostructure designed by lattice matching strategy for highly sensitive vacuum ultraviolet photodetection
نویسندگان
چکیده
One judiciously designed strategy of utilizing an ultrathin but conductive Ga2O3:Si nanolayer to prepare (AlGa)2O3 crystalline film is demonstrated. Benefiting from the existence nanolayer, a high-quality (Al0.68Ga0.32)2O3 sesquioxide with 68 at.% aluminum was epitaxially grown on sapphire substrates, which characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy and diffraction. Its bandgap broadened 6.14 eV, vacuum ultraviolet (VUV) (AlGa)2O3/Ga2O3:Si photodetector subsequently fabricated. The detector exhibits pretty high on-off ratio about 103, open-circuit voltage 1.0 V responsivity 8.1 mAW−1 at 0 bias voltage. performances imply that proposed valuable for improving quality also adjusting sesquioxides, expected facilitate their application in VUV photodetection.
منابع مشابه
Ultrawide‐Bandgap Semiconductors: Research Opportunities and Challenges
Ultrawide-bandgap (UWBG) semiconductors, with bandgaps significantly wider than the 3.4 eV of GaN, represent an exciting and challenging new area of research in semiconductor materials, physics, devices and applications. Because many figures-ofmerit for device performance scale nonlinearly with bandgap, these semiconductors have long been known to have potential compelling advantages over their...
متن کاملUltrawide Baseline Facade Matching for Geo-localization
Matching street-level images to a database of airborne images is hard because of extreme viewpoint and illumination differences. Color/gradient distributions or local descriptors fail to match forcing us to rely on the structure of self-similarity of patterns on facades. We propose to capture this structure with a novel “scale-selective self-similarity” (S) descriptor which is computed at each ...
متن کاملEnhancing ultraviolet spontaneous emission with a designed quantum vacuum: erratum.
We present a correction to parts of Fig. 5, Fig. 6 and Fig. 7, relating to the Purcell factors and Lamb shifts, due to an incorrect renormalization used in our custom Fortran code. The resulting corrections to some of the Q-factors are large, but do not affect the conclusions of the original manuscript.
متن کاملA highly sensitive ultraviolet sensor based on a facile in situ solution-grown ZnO nanorod/graphene heterostructure.
The weak photon absorption and fast carrier kinetics of graphene limit its application in photodetection. This limitation can be overcome by introducing photosensitive nanostructures to graphene. Herein we report the synthesis of a ZnO nanorod/graphene heterostructure by a facile in situ solution growth method. By combining the attributes of photosensitive ZnO nanorods and highly conductive gra...
متن کاملA hybrid organic semiconductor/silicon photodiode for efficient ultraviolet photodetection.
A method employing conjugated polymer thin film blends is shown to provide a simple and convenient way of greatly enhancing the ultraviolet response of silicon photodetectors. Hybrid organic semiconductor/silicon photodetectors are demonstrated using fluorene copolymers and give a quantum efficiency of 60% at 200 nm. The quantum efficiency is greater than 34% over the entire 200-620 nm range. T...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1698-3