Journal ArticleUnknown
Discovery of Type II Interlayer Trions
Authors
Author Affiliations
Nanjing University of Aeronautics and Astronautics, Southwest University of Science and Technology, Ningbo University, Ningbo University of Technology, ...
Published InAdvanced Materials
Year2022
Citations19
Abstract
Abstract In terms of interlayer trions, electronic excitations in van der Waals heterostructures (vdWHs) can be classified into Type I (i.e., two identical charges in the same layer) and Type II (i.e., two identical charges in the different layers). Type I interlayer trions are investigated theoretically and experimentally. By contrast, Type II interlayer trions remain elusive in vdWHs, due to inadequate free charges, unsuitable band alignment, reduced Coulomb interactions, poor interface quality, etc. Here, the first observation of Type II interlayer trions is reported by exploring band alignments and choosing an atomically thin organic–inorganic system—monolayer WSe 2 /bilayer pentacene heterostructure (1L + 2L HS). Both positive and negative Type II interlayer trions are electrically tuned and observed via PL spectroscopy.…
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