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Giant Enhancement of Photoluminescence Emission in WS2-2D Perovskite Heterostructures

Yang, Arky and Blancon, Jean-Christophe and Jiang, Wei and Zhang, Hao and Wong, Joeson and Yan, Ellen and Lin, Yi-Rung and Crochet, Jared and Kanatzidis, Mercouri G. and Jariwala, Deep and Low, Tony and Mohite, Aditya D. and Atwater, Harry A. (2019) Giant Enhancement of Photoluminescence Emission in WS2-2D Perovskite Heterostructures. Nano Letters . ISSN 1530-6984. (In Press)

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Transition metal dichalcogenides (TMDCs) and two-dimensional organic and inorganic hybrid lead halide perov-skites (2DPVSKs) have emerged as highly promising materials for ultralight and ultrathin optoelectronics application. They both exhibit tunability of electronic properties such as band structure, and they can form heterostructures with various types of two-dimensional materials for novel physical proper-ties not observed in single components. However, TMDCs exhibit poor emission due to defect states and direct-to-indirect interband transition, and 2DPVSKs suffer from poor stability in ambient atmosphere. Here we report that fabrica-tion of TMDC-on-2DPVSK heterostructures using a solvent-less process, leads to novel optical transitions unique to the heterostructure, which arise from the hybrid interface and ex-hibit a strong photoluminescence. Moreover a two orders of magnitude enhancement of the photoluminescence as com-pared to WS2 emission is observed. The TMDC on top of 2DPVSK also significantly improves the stability as com-pared to bare 2DPVSK. Enhanced emission can be explained by electronic structure modification of TMDC by novel inter-facial interactions between TMDC and 2DPVSK materials, which shows promise of the heterostructure for high efficiency and stable optoelectronic devices.

Item Type:Article
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URLURL TypeDescription
Wong, Joeson0000-0002-6304-7602
Jariwala, Deep0000-0002-3570-8768
Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2019 American Chemical Society. Publication Date:June 24, 2019. This work is part of the 'Photonics at Thermodynamic Limits' Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0019140. We also acknowledge Northrop Grumman for financial support of instrumentation. A.Y and J.W. acknowledges financial support from a Resnick Institute Fellowship. A.D.M and J.C.B acknowledge support by DOE-EERE DE-FOA-0001647 program. We acknowledge support from the Beckman Institute of the California Institute of Technology to the Molecular Materials Research Center. We are grateful to Prof. George R. Rossman for technical help, discussions, and support. We thank Prof. Jacky Even for useful discussions concerning the perovskite surface termination.
Group:Resnick Sustainability Institute
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0019140
Northrop Grumman CorporationUNSPECIFIED
Resnick Sustainability InstituteUNSPECIFIED
Department of Energy (DOE)DE-FOA-0001647
Caltech Beckman InstituteUNSPECIFIED
Subject Keywords:Two dimensional materials; perovskite; transition metal dichalcogenide; heterostructure; interface; photoluminescence
Record Number:CaltechAUTHORS:20190624-131401605
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Official Citation:Giant Enhancement of Photoluminescence Emission in WS2-2D Perovskite Heterostructures. Arky Qin Yang, Jean-Christophe Blancon, Wei Jiang, Hao Zhang, Joeson Wong, Ellen X. Yan, Yi Rung Lin, Jared J. Crochet, Mercouri G. Kanatzidis, Deep Jariwala, Tony Low, Aditye Mohite, and Harry A Atwater. Nano Letters. Just Accepted Manuscript. DOI: 10.1021/acs.nanolett.8b05105
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96668
Deposited By: Tony Diaz
Deposited On:25 Jun 2019 17:40
Last Modified:25 Jun 2019 17:40

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