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Self-Driven WSe2/Bi2O2Se Van der Waals Heterostructure Photodetectors with High Light On/Off Ratio and Fast Response
P. Luo; F. Wang; J. Qu; K. Liu; X. Hu; K. Liu and T. Zhai
2021
发表期刊Advanced Functional Materials
ISSN1616301X
卷号31期号:8
摘要Benefiting from the superior electron mobility and good air-stability, the emerging layered bismuth oxyselenide (Bi2O2Se) nanosheet has received considerable attention with the promising prospects for electronics and optoelectronics applications. However, the high charge carrier concentration and bolometric effect of Bi2O2Se give rise to the high dark current and relatively slow photoresponse, which severely impede further improvement of the performance of Bi2O2Se based photodetectors. Here, a WSe2/Bi2O2Se Van der Waals p-n heterostructure is reported with a pronounced rectification ratio of 105 and a low reverse dark current of 1011 A, as well as an enhanced light on/off ratio up to 618 under 532nm light illumination. The device also exhibits a fast response speed of 2.6 s and a broadband detection capability from 365 to 2000nm due to the efficient charge separation and strong interlayer coupling at the interface of the two flakes. Importantly, the built-in potential in the WSe2/Bi2O2Se heterostructure offers a competitive self-powered photodetector with the light on/off ratio above 105 and a photovoltaic responsivity of 284mA W1. The WSe2/Bi2O2Se heterostructure shows promising potentials for high-performance self-driven photodetector applications. 2020 Wiley-VCH GmbH
DOI10.1002/adfm.202008351
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条目标识符http://ir.ciomp.ac.cn/handle/181722/65616
专题中国科学院长春光学精密机械与物理研究所
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P. Luo,F. Wang,J. Qu,et al. Self-Driven WSe2/Bi2O2Se Van der Waals Heterostructure Photodetectors with High Light On/Off Ratio and Fast Response[J]. Advanced Functional Materials,2021,31(8).
APA P. Luo,F. Wang,J. Qu,K. Liu,X. Hu,&K. Liu and T. Zhai.(2021).Self-Driven WSe2/Bi2O2Se Van der Waals Heterostructure Photodetectors with High Light On/Off Ratio and Fast Response.Advanced Functional Materials,31(8).
MLA P. Luo,et al."Self-Driven WSe2/Bi2O2Se Van der Waals Heterostructure Photodetectors with High Light On/Off Ratio and Fast Response".Advanced Functional Materials 31.8(2021).
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