Title: Strong interlayer coupling and long-lived interlayer excitons in two-dimensional perovskite derivatives and transition metal dichalcogenides van der Waals heterostructures

Journal Article · · Materials Today
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [2];  [2]; ORCiD logo [2];  [2];  [2];  [2]; ORCiD logo [2]; ORCiD logo [2];  [5];  [2];  [4]; ORCiD logo [2]
  1. Rice Univ., Houston, TX (United States); Fudan Univ., Shanghai (China)
  2. Rice Univ., Houston, TX (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM); Hong Kong Polytechnic University, Hong Kong (China)
  4. Texas A & M Univ., College Station, TX (United States)
  5. Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)

Two-dimensional (2D) van der Waals (vdW) heterostructures offer new platforms for exploring novel physics and diverse applications ranging from electronics and photonics to optoelectronics at the nanoscale. The studies to date have largely focused on transition-metal dichalcogenides (TMDCs) based samples prepared by mechanical exfoliation method, therefore it is of signi ficant interests to study high-quality vdW heterostructures using novel materials prepared by a versatile method. Here, we report a two-step vapor phase growth process for the creation of high-quality vdW heterostructures based on perovskites and TMDCs, such as 2D Cs3Bi2I9/MoSe2, with a large lattice mismatch. Supported by experimental and theoretical investigations, we discover that the Cs3Bi2I9/MoSe2 vdW heterostructure possesses hybrid band alignments consisting of type -I and type-II heterojunctions because of the existence of defect energy levels in Cs3Bi2I9. More importantly, we demonstrate that the type-II heterojunction in the Cs3Bi2I9/MoSe2 vdW heterostructure not only shows a higher interlayer exciton density, but also exhibits a longer interlayer exciton lifetime than traditional 2D TMDCs based type-II heterostructures. We attribute this phenomenon to the reduced overlap of electron and hole wavefunctions caused by the large lattice mismatch. Finally, our work demonstrates that it is possible to directly grow high-quality vdW heterostructures based on entirely different materials which provide promising platforms for exploring novel physics and cutting-edge applications, such as optoelectronics, valleytronics, and high-temperature super fluidity.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES); Welch Foundation
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2480511
Journal Information:
Materials Today, Journal Name: Materials Today Vol. 74; ISSN 1369-7021
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Bismuth Based Hybrid Perovskites A 3 Bi 2 I 9 (A: Methylammonium or Cesium) for Solar Cell Application journal September 2015
Defects as a factor limiting carrier mobility in WSe2: A spectroscopic investigation journal September 2016
Heterostructures based on two-dimensional layered materials and their potential applications journal July 2016
Lead-free, air-stable ultrathin Cs3Bi2I9 perovskite nanosheets for solar cells journal September 2018
Controlled Growth of Two-Dimensional Heterostructures: In-Plane Epitaxy or Vertical Stack journal August 2022
2D Heterostructures for Ubiquitous Electronics and Optoelectronics: Principles, Opportunities, and Challenges journal February 2022
Chemical Vapor Deposition Growth and Applications of Two-Dimensional Materials and Their Heterostructures journal January 2018
Poor Photovoltaic Performance of Cs 3 Bi 2 I 9 : An Insight through First-Principles Calculations journal August 2017
Helicity-Resolved Raman Scattering of MoS 2 , MoSe 2 , WS 2 , and WSe 2 Atomic Layers journal March 2015
Probing Interlayer Interactions in Transition Metal Dichalcogenide Heterostructures by Optical Spectroscopy: MoS 2 /WS 2 and MoSe 2 /WSe 2 journal July 2015
Interlayer Exciton Optoelectronics in a 2D Heterostructure p–n Junction journal January 2017
Interfacial Charge Transfer Circumventing Momentum Mismatch at Two-Dimensional van der Waals Heterojunctions journal May 2017
Long-Lived Direct and Indirect Interlayer Excitons in van der Waals Heterostructures journal August 2017
Probing the Interlayer Exciton Physics in a MoS 2 /MoSe 2 /MoS 2 van der Waals Heterostructure journal September 2017
Robust Interlayer Coupling in Two-Dimensional Perovskite/Monolayer Transition Metal Dichalcogenide Heterostructures journal July 2020
Interlayer Exciton Transport in MoSe2/WSe2 Heterostructures journal January 2021
Upconversion Photovoltaic Effect of WS2/2D Perovskite Heterostructures by Two-Photon Absorption journal May 2021
Charge Transfer Excitons at van der Waals Interfaces journal June 2015
Chemical Vapor Deposition Growth of Crystalline Monolayer MoSe2 journal April 2014
High-temperature superfluidity with indirect excitons in van der Waals heterostructures journal July 2014
Observation of long-lived interlayer excitons in monolayer MoSe2–WSe2 heterostructures journal February 2015
Vapour phase growth and grain boundary structure of molybdenum disulphide atomic layers journal June 2013
Vertical and in-plane heterostructures from WS2/MoS2 monolayers journal September 2014
Giant magnetic splitting inducing near-unity valley polarization in van der Waals heterostructures journal November 2017
Cleaning interfaces in layered materials heterostructures journal December 2018
High phase-purity 1T′-MoS2- and 1T′-MoSe2-layered crystals journal April 2018
Molecularly thin two-dimensional hybrid perovskites with tunable optoelectronic properties due to reversible surface relaxation journal September 2018
Dipolar interactions between localized interlayer excitons in van der Waals heterostructures journal April 2020
Interlayer valley excitons in heterobilayers of transition metal dichalcogenides journal August 2018
Ultrafast dynamics in van der Waals heterostructures journal November 2018
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices journal February 2019
General synthesis of two-dimensional van der Waals heterostructure arrays journal March 2020
Dielectric properties of hexagonal boron nitride and transition metal dichalcogenides: from monolayer to bulk journal March 2018
Van der Waals heterostructures journal July 2022
Inch-size Cs3Bi2I9 polycrystalline wafers with near-intrinsic properties for ultralow-detection-limit X-ray detection journal January 2022
Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure journal June 2017
Exciton correlations in coupled quantum wells and their luminescence blue shift journal November 2009
Extended Spatial Coherence of Interlayer Excitons inMoSe2/WSe2Heterobilayers journal July 2023
Atomically thin two-dimensional organic-inorganic hybrid perovskites journal September 2015
Valley-polarized exciton dynamics in a 2D semiconductor heterostructure journal February 2016
Electrical control of interlayer exciton dynamics in atomically thin heterostructures journal November 2019
Perovskite-transition metal dichalcogenides heterostructures: recent advances and future perspectives journal January 2022