„Perovskite-based van der Waals heterostructures for
photodetector applications (PeroVanHDet)”
POLONEZ BIS -3
Principal
Investigator:
dr Samrat Das Adhikari
Kasprzaka 44/52
01-224 Warsaw
Building 3, Room
W09A
Project
description:
2D perovskite heterostructures are in the
forefront of current research for photodetector (PD) application because of
their outstanding optoelectronic performances and synergies of the conjugated
semiconductor band alignments. Their
magnificent optical and electronic properties fulfil the criteria for the
potential photodetector candidate. In the present day, perovskite materials are
very promising in terms of their easy and low-cost preparation method, outstanding
visible absorption and emission and their efficient solar to power conversion
efficiencies. Tremendous achievements in 2D semiconductor heterojunctions have
been obtained in photodetector applications. Perovskite semiconductors forms atomic
thin-layer to thicker nanoplatelets to micron-sized 2D sheets, which are
considered to be effective as an active layer for the PD application. In this
context, several concepts are employed in this proposal to explore the
opportunities of perovskite heterostructure-based PDs. Heterojunction in
semiconductors define a conjugation of two different material with dissimilar bandgaps,
which combines through lattice matching between their crystals. Experimental
synthesis experiences some difficulties of lattice matching between two
individual semiconductors, which indeed restricts potential band conjugation
and hence fails to provide esteemed synergies. In this point, 2D materials are
very interesting for the formation of van der Waals heterojunction between two
different semiconductor nanosheets provided their hybrid organic-inorganic
structure, surface charges in the lateral direction of the nanoplatelets, etc.
Interestingly, 2D perovskites contribute thickness dependent bandgap tuning,
where with the increase of thickness of the platelets, bandgap decreases.
Therefore, coexistence of 2D hybrid organic-inorganic perovskites with
different thickness in solution or thin film form van der Waals
heterostructures. This phenomenon is quite interesting to explore the heterostructure-based
PD applications. Apart from this, treatment of 2D perovskite nanoplatelets and transition
metal dichalcogenides (TMDC) is liable to form van der Waals heterostructure,
which has proven to provide some enhanced performances. Inspired from this
concept, this project will be on the discovery of new heterojunction with
different thickness of perovskites and TMDC semiconductors altering their
thickness to optimize the best PD performance.
Project
Location:
Institute of Physical Chemistry Polish Academy of Sciences
Research group no. 26, Semiconducting Materials and Optoelectronic Devices
https://ichf.edu.pl/en/groups/semiconducting-materials-and-optoelectronic-devices
The research topics of the Research group no. 26 focus on the fabrication and physicochemical characterization of laboratory solar cells and photodetectors based on halide perovskites.
Publications:
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Project news:
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This research is part of the project No.
2022/47/P/ST5/03261 co-funded by the National
Science Centre and the European Union’s Horizon 2020
research and innovation
programme under the Marie Sk³odowska-Curie grant
agreement No. 945339.