Giant Enhancement of Photoluminescence Emission in WS2-Two-Dimensional Perovskite Heterostructures

Arky Yang, Jean Christophe Blancon, Wei Jiang, Hao Zhang, Joeson Wong, Ellen Yan, Yi Rung Lin, Jared Crochet, Mercouri G. Kanatzidis, Deep Jariwala, Tony Low, Aditya D. Mohite, Harry A. Atwater

Research output: Contribution to journalArticlepeer-review

69 Scopus citations


Transition metal dichalcogenides (TMDCs) and two-dimensional organic and inorganic hybrid lead halide perovskites (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 properties not observed in single components. However, TMDCs exhibit poor emission efficiency due to defect states and direct-to-indirect interband transition, and 2DPVSKs suffer from poor stability in ambient atmosphere. Here we report that fabrication of TMDC-on-2DPVSK heterostructures using a solvent-free process leads to novel optical transitions unique to the heterostructure which arise from the hybrid interface and exhibit a strong photoluminescence. Moreover, a two orders of magnitude enhancement of the photoluminescence as compared to WS2 emission is observed. The TMDC on top of 2DPVSK also significantly improves the stability as compared to bare 2DPVSK. Enhanced emission can be explained by electronic structure modification of TMDC by novel interfacial interactions between TMDC and 2DPVSK materials, which shows promise of the heterostructure for high efficiency and stable optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)4852-4860
Number of pages9
JournalNano letters
Issue number8
StatePublished - Aug 14 2019

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.


  • Two dimensional materials
  • heterostructure
  • interface
  • perovskite
  • photoluminescence
  • transition metal dichalcogenide


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