Ultrathin Ruddlesden-Popper Perovskite Heterojunction for Sensitive Photodetection

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Qundong FuZheng Liu

Abstract

Thanks to their unique optical and electric properties, 2D materials have attracted a lot of interest for optoelectronic applications. Here, the emerging 2D materials, organic-inorganic hybrid perovskites with van der Waals interlayer interaction (Ruddlesden-Popper perovskites), are synthesized and characterized. Photodetectors based on the few-layer Ruddlesden-Popper perovskite show good photoresponsivity as well as good detectivity. In order to further improve the photoresponse performance, 2D MoS2 is chosen to construct the perovskite-MoS2 heterojunction. The performance of the hybrid photodetector is largely improved with 6 and 2 orders of magnitude enhancement for photoresponsivity (104 A W-1 ) and detectivity (4 × 1010 Jones), respectively, which demonstrates the facile charge separation at the interface between perovskite and MoS2 . Furthermore, the contribution of back gate tuning is proved with a greatly reduced dark current. The results demonstrated here will open up a new field for the investigation of 2D perovskites for optoelectronic applications.

References

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Nov 13, 2018·Advanced Materials·Qundong FuZheng Liu

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Citations

Dec 22, 2020·Advanced Materials·Hsin-Ping WangJr-Hau He
Jul 7, 2021·ACS Applied Materials & Interfaces·Miriam KarpińskaPaulina Plochocka
Aug 21, 2021·The Journal of Physical Chemistry Letters·Haizhen WangDehui Li
Sep 15, 2020·ACS Applied Materials & Interfaces·Qixing WangAndrew T S Wee
Jan 28, 2020·ACS Applied Materials & Interfaces·Yuanzhi WeiJizheng Wang

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