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- W2766144865 abstract "Abstract The design of nanostructure plays an important role in performance enhancement of low‐dimensional optoelectronic devices. Herein, a novel photodetector (PD) based on electrospun SnO 2 nanofibers with Ω‐shaped ZnO shell (SnO 2 @ZnO) is fabricated. With 87.4% transmittance at 550 nm, SnO 2 @ZnO PD exhibits a high photo‐to‐dark current ratio up to 10 4 at around 280 nm. Owing to the additional Ω‐shaped ZnO shell, SnO 2 @ZnO PD possesses a responsivity of nearly 100 A W −1 under 5 V bias and the illumination of 250 nm light, which is 30‐time enhancement of pristine SnO 2 PD. The enhancement is mainly attributed to type‐II energy band structure. Furthermore, by changing the direction of incident light, SnO 2 @ZnO PD has a high UV selectivity with an UV–vis rejection ratio ( R 250 nm / R 400 nm ) as much as 2.0 × 10 3 at 5 V bias under back illumination, which is fourfold higher than that under face illumination. The UV selectivity improvement may be attributed to light confinement in the Ω‐shaped structure. With both theoretical simulations and experimental comparisons, it is demonstrated that the unique compact Ω‐shaped nanostructure does contribute to photon trapping and gaining process, especially in back‐illumination configuration. The approach can be easily extended to other materials, preparing novel building blocks for optoelectronic devices." @default.
- W2766144865 created "2017-11-10" @default.
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- W2766144865 date "2017-10-25" @default.
- W2766144865 modified "2023-10-15" @default.
- W2766144865 title "Novel Ω-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity" @default.
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- W2766144865 doi "https://doi.org/10.1002/adfm.201704477" @default.
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