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ANHARMONIC SIGNED

Anharmonic Semiconductors

Total Cost €

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EC-Contrib. €

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Partnership

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 ANHARMONIC project word cloud

Explore the words cloud of the ANHARMONIC project. It provides you a very rough idea of what is the project "ANHARMONIC" about.

self    discoveries    modulated    charges    electric    desirable    electronic    probe    interactions    scheme    resolved    polar    binding    showed    spectroscopy    quantify    lifetimes    edge    frequency    density    gives    mobility    photovoltaic    impedance    optical    perovskites    inorganic    healing    excellent    semiconductors    conventional    solid    liquid    strategy    coupled    raman    tool    elucidating    energies    perovskite    amplitude    combination    words    relationship    terahertz    crystals    carriers    hypothezise    induce    spectroscopic    mechanism    local    fluctuations    beneficial    anharmonicity    behave    spectroscopies    defect    methodology    recent    anharmonic    decreases    scs    organic    screening    mobilities    band    carrier    engineering    microscopic    ionic    photoluminescence    molecule    apart    reflectance    perform    lattice    exciton    property    compare    investigation    motions    dielectric    solids    material    small    outcome    localize    exhibit    dynamics    time    crystalline    generalize    fundamental    stimulated    halide   

Project "ANHARMONIC" data sheet

The following table provides information about the project.

Coordinator
WEIZMANN INSTITUTE OF SCIENCE 

Organization address
address: HERZL STREET 234
city: REHOVOT
postcode: 7610001
website: www.weizmann.ac.il

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Israel [IL]
 Total cost 1˙700˙000 €
 EC max contribution 1˙700˙000 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2019-STG
 Funding Scheme ERC-STG
 Starting year 2019
 Duration (year-month-day) from 2019-11-01   to  2024-10-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    WEIZMANN INSTITUTE OF SCIENCE IL (REHOVOT) coordinator 1˙700˙000.00

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 Project objective

Recent studies of halide perovskite semiconductors (SCs) showed that they exhibit a unique combination of very-low defect density, self-healing properties and low exciton binding energies that result in excellent photovoltaic activity.

I hypothezise that the fundamental property that sets the halide perovskites apart from conventional SCs and gives rise to their beneficial properties is strongly anharmonic lattice dynamics. Large amplitude, local polar fluctuations that result from lattice anharmonicity localize the electronic states and enhance the screening of electric charges within the material. In other words, in some aspects, halide perovskites behave more like a liquid than a crystalline solid. Stimulated by the recent discoveries on halide perovskites, I aim to generalize our understanding of the relationship between lattice anharmonicity and the electronic properties of SCs. The potential outcome of this investigation will be a novel scheme to design SCs with desirable properties where lattice anharmonicity is used as a new material-engineering tool.

My strategy is to perform comparative studies in both inorganic ionic crystals and small-molecule organic crystals. We will use low-frequency Raman spectroscopy to quantify anharmonic lattice dynamics and compare between different crystals to identify the factors that induce anharmonicity in solids. Photoluminescence, reflectance, time-resolved terahertz and impedance spectroscopies will be used to probe the SCs optical properties, carrier mobilities and lifetimes, and their dielectric response. I expect to find that as anharmonicity increases, the dielectric response and carrier lifetimes increase while carrier mobility decreases. Finally, we will develop a modulated Raman spectroscopic methodology that will identify specific lattice motions that are coupled to band-edge carriers, thus elucidating the microscopic mechanism of carrier-lattice interactions.

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The information about "ANHARMONIC" are provided by the European Opendata Portal: CORDIS opendata.

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