Ultrathin Ruddlesden-Popper Perovskite Heterojunction for Sensitive Photodetection

Qundong Fu; Xiaolei Wang; Fucai Liu; Yuxin Dong; Zirui Liu; Shoujun Zheng; Apoorva Chaturvedi; Jiadong Zhou; Peng Hu; Zhuqing Zhu; Fang Bo; Yi Long; Zheng Liu

doi:10.1002/smll.201902890

Ultrathin Ruddlesden-Popper Perovskite Heterojunction for Sensitive Photodetection

Small. 2019 Sep;15(39):e1902890. doi: 10.1002/smll.201902890. Epub 2019 Aug 7.

Authors

Qundong Fu^{1

2}, Xiaolei Wang³, Fucai Liu⁴, Yuxin Dong³, Zirui Liu⁵, Shoujun Zheng⁶, Apoorva Chaturvedi¹, Jiadong Zhou¹, Peng Hu⁷, Zhuqing Zhu⁸, Fang Bo⁹, Yi Long¹, Zheng Liu¹

Affiliations

¹ Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
² CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza, Singapore, 637553, Singapore.
³ Institute of Modern Optics, Key Laboratory of Optical Information Science and Technology, Nankai University, Tianjin, 300350, China.
⁴ School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.
⁵ School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China.
⁶ Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences and The Photonics Institute, Nanyang Technological University, Singapore, 637371, Singapore.
⁷ School of Physics, Northwest University, Xi'an, 710069, P. R. China.
⁸ Key Laboratory of Optoelectronic Technology of Jiangsu Province, School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, Jiangsu, China.
⁹ The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics Institute, and School of Physics, Nankai University, Tianjin, 300457, China.

PMID: 31390149
DOI: 10.1002/smll.201902890

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.

Keywords: 2D materials; Ruddlesden-Popper; organic-inorganic perovskites; photodetectors.

Abstract

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