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Moiré superlattices in twisted two-dimensional halide perovskites.
Zhang, Shuchen; Jin, Linrui; Lu, Yuan; Zhang, Linghai; Yang, Jiaqi; Zhao, Qiuchen; Sun, Dewei; Thompson, Joshua J P; Yuan, Biao; Ma, Ke; Park, Jee Yung; Lee, Yoon Ho; Wei, Zitang; Finkenauer, Blake P; Blach, Daria D; Kumar, Sarath; Peng, Hailin; Mannodi-Kanakkithodi, Arun; Yu, Yi; Malic, Ermin; Lu, Gang; Dou, Letian; Huang, Libai.
Affiliation
  • Zhang S; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Jin L; Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, China.
  • Lu Y; Department of Chemistry, Purdue University, West Lafayette, IN, USA.
  • Zhang L; School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
  • Yang J; School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing, China.
  • Zhao Q; School of Materials Engineering, Purdue University, West Lafayette, IN, USA.
  • Sun D; Department of Chemistry, Purdue University, West Lafayette, IN, USA.
  • Thompson JJP; Department of Chemistry, Purdue University, West Lafayette, IN, USA.
  • Yuan B; Department of Physics, Philipps-Universität Marburg, Marburg, Germany.
  • Ma K; School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
  • Akriti; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Park JY; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Lee YH; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Wei Z; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Finkenauer BP; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Blach DD; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA.
  • Kumar S; Department of Chemistry, Purdue University, West Lafayette, IN, USA.
  • Peng H; Department of Chemistry, Purdue University, West Lafayette, IN, USA.
  • Mannodi-Kanakkithodi A; Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
  • Yu Y; School of Materials Engineering, Purdue University, West Lafayette, IN, USA.
  • Malic E; School of Physical Science and Technology, ShanghaiTech University, Shanghai, China.
  • Lu G; Department of Physics, Philipps-Universität Marburg, Marburg, Germany.
  • Dou L; Department of Physics and Astronomy, California State University Northridge, Northridge, CA, USA.
  • Huang L; Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA. dou10@purdue.edu.
Nat Mater ; 2024 Jun 21.
Article in En | MEDLINE | ID: mdl-38906993
ABSTRACT
Moiré superlattices have emerged as a new platform for studying strongly correlated quantum phenomena, but these systems have been largely limited to van der Waals layer two-dimensional materials. Here we introduce moiré superlattices leveraging ultrathin, ligand-free halide perovskites, facilitated by ionic interactions. Square moiré superlattices with varying periodic lengths are clearly visualized through high-resolution transmission electron microscopy. Twist-angle-dependent transient photoluminescence microscopy and electrical characterizations indicate the emergence of localized bright excitons and trapped charge carriers near a twist angle of ~10°. The localized excitons are accompanied by enhanced exciton emission, attributed to an increased oscillator strength by a theoretically predicted flat band. This research showcases the promise of two-dimensional perovskites as unique room-temperature moiré materials.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nat Mater Journal subject: CIENCIA / QUIMICA Year: 2024 Document type: Article Affiliation country: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nat Mater Journal subject: CIENCIA / QUIMICA Year: 2024 Document type: Article Affiliation country: United States