UM
Back-to-back symmetric Schottky type UVA photodetector based on ternary alloy BeZnO
Su, Longxing; Zhu, Yuan; Xu, Xiaojie; Chen, Hongyu; Tang, Zikang; Fang, Xiaosheng
2018-08-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY C
ISSN2050-7526
Volume6Issue:29Pages:7776-7782
AbstractIn this work, a back-to-back symmetric Schottky type ultraviolet (UV) photodetector based on ternary alloy BeZnO was reported. High quality ternary alloy BeZnO was grown on a c-sapphire substrate via rf-plasma assisted molecular beam epitaxy (rf-MBE). The bandgap of BeZnO film was confirmed to be similar to 3.54 eV and two-mode phonon vibration behavior was found in the resonant Raman spectrum. According to the modified random element isodisplacement (MREI) model, the two-mode behavior is due to the smaller effective mass of the substituting element Be in comparison with that of ZnO. Subsequently, we fabricated a symmetric Schottky type photodetector through using the high work function metal Au as the electrodes. Due to the incorporation of Be, the dark current of the device under 10 V is as low as similar to 1 pA. The device showed a noticeable UV response with a response peak at 325 nm and a cut-off edge at 365 nm. At 5 V, the peak responsivity was as high as 10 mA W-1, which is the best result in BeZnO based photodetectors. Compared with ZnO-based photoconductive type photodetectors, the Schottky type device has a much faster response speed with a rise time of 1.48 ms and a decay time of 4 ms. Our findings provide a promising approach to realize a high performance UV photodetector based on novel ternary alloy BeZnO.
DOI10.1039/c8tc02255k
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000445742500009
PublisherROYAL SOC CHEMISTRY
The Source to ArticleWOS
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Su, Longxing,Zhu, Yuan,Xu, Xiaojie,et al. Back-to-back symmetric Schottky type UVA photodetector based on ternary alloy BeZnO[J]. JOURNAL OF MATERIALS CHEMISTRY C,2018,6(29):7776-7782.
APA Su, Longxing,Zhu, Yuan,Xu, Xiaojie,Chen, Hongyu,Tang, Zikang,&Fang, Xiaosheng.(2018).Back-to-back symmetric Schottky type UVA photodetector based on ternary alloy BeZnO.JOURNAL OF MATERIALS CHEMISTRY C,6(29),7776-7782.
MLA Su, Longxing,et al."Back-to-back symmetric Schottky type UVA photodetector based on ternary alloy BeZnO".JOURNAL OF MATERIALS CHEMISTRY C 6.29(2018):7776-7782.
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