Novel Omega-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity

	Novel Omega-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity
	Hu, M. X.; F. Teng; H. Y. Chen; M. M. Jiang; Y. Z. Gu; H. L. Lu; L. F. Hu and X. S. Fang
	2017
发表期刊	Advanced Functional Materials
卷号	27 期号:47
摘要	The design of nanostructure plays an important role in performance enhancement of low-dimensional optoelectronic devices. Herein, a novel photodetector (PD) based on electrospun SnO2 nanofibers with Omega-shaped ZnO shell (SnO2@ZnO) is fabricated. With 87.4% transmittance at 550 nm, SnO2@ZnO PD exhibits a high photo-to-dark current ratio up to 10(4) at around 280 nm. Owing to the additional Omega-shaped ZnO shell, SnO2@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 SnO2 PD. The enhancement is mainly attributed to type-II energy band structure. Furthermore, by changing the direction of incident light, SnO2@ZnO PD has a high UV selectivity with an UV-vis rejection ratio (R-250 nm/R-400 nm) as much as 2.0 x 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 Omega-shaped structure. With both theoretical simulations and experimental comparisons, it is demonstrated that the unique compact Omega-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.
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/58945
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Hu, M. X.,F. Teng,H. Y. Chen,et al. Novel Omega-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity[J]. Advanced Functional Materials,2017,27(47).
APA	Hu, M. X..,F. Teng.,H. Y. Chen.,M. M. Jiang.,Y. Z. Gu.,...&L. F. Hu and X. S. Fang.(2017).Novel Omega-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity.Advanced Functional Materials,27(47).
MLA	Hu, M. X.,et al."Novel Omega-Shaped Core-Shell Photodetector with High Ultraviolet Selectivity and Enhanced Responsivity".Advanced Functional Materials 27.47(2017).

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