ORCID Profile
0000-0003-4078-4965
Current Organisation
Politechnika Wrocławska
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Publisher: American Chemical Society (ACS)
Date: 29-01-2019
Publisher: American Chemical Society (ACS)
Date: 04-09-2019
Publisher: Wiley
Date: 23-07-2023
Abstract: 2D Ruddlesden‐Popper metal‐halide perovskites feature particularly strong excitonic effects, making them a fascinating playground for studying exciton physics. A complete understanding of the properties of this quasi‐particle is crucial to fully exploit the tremendous potential of 2D perovskites (2DP) in light emission applications. Despite intense investigations, some of the exciton properties remain elusive to date, for ex le, the energy‐ordering of the exciton states within the so‐called fine structure manifold. Using optical spectroscopy, it demonstrates that in the archetypical 2DP (PEA) 2 PbI 4 , in contradiction to theoretical predictions, the energy of the bright out‐of‐plane exciton state is higher than that of two in‐plane states. Having elucidated the order of exciton fine structure, it determines the g ‐factor of the dark exciton transition, together with the values of the electron and hole g ‐factors in the direction parallel to the c ‐axis of the crystal. In this way, it provides for the first time, a complete picture of the exciton fine structure in (PEA) 2 PbI 4 2DP.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7EE00685C
Abstract: The authors directly show that grain size and quality have a negligible impact on the excitonic characteristics of perovskite semiconductors.
Publisher: American Physical Society (APS)
Date: 04-08-2022
Publisher: American Chemical Society (ACS)
Date: 17-07-2018
Publisher: American Chemical Society (ACS)
Date: 02-02-2022
DOI: 10.1021/ACS.NANOLETT.1C04197
Abstract: Hexagonal boron nitride (hBN) is widely used as a protective layer for few-atom-thick crystals and heterostructures (HSs), and it hosts quantum emitters working up to room temperature. In both instances, strain is expected to play an important role, either as an unavoidable presence in the HS fabrication or as a tool to tune the quantum emitter electronic properties. Addressing the role of strain and exploiting its tuning potentiality require the development of efficient methods to control it and of reliable tools to quantify it. Here we present a technique based on hydrogen irradiation to induce the formation of wrinkles and bubbles in hBN, resulting in remarkably high strains of ∼2%. By combining infrared (IR) near-field scanning optical microscopy and micro-Raman measurements with numerical calculations, we characterize the response to strain for both IR-active and Raman-active modes, revealing the potential of the vibrational properties of hBN as highly sensitive strain probes.
Publisher: American Chemical Society (ACS)
Date: 13-05-2022
Location: France
No related grants have been discovered for Alessandro Surrente.