Loreta A. Muscarella

Loreta A. Muscarella
Utrecht University | UU · Division of Inorganic Chemistry and Catalysis

Doctor of Philosophy

About

37
Publications
5,901
Reads
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600
Citations
Additional affiliations
January 2018 - December 2021
AMOLF
Position
  • PhD
September 2016 - March 2017
University of Amsterdam
Position
  • Intern
Description
  • The work aims to study lead-based perovskite, dopants to improve their optical, electronic and stability properties.Thin films layers were made with additives as morphology-controller. Solar cells devices were tested at TU/e.
March 2015 - July 2015
Sapienza University of Rome
Position
  • Intern
Description
  • "Synthesis and characterisation of Gold and Silver nanoparticles" for biotechnological applications. The work aimed to synthesize study nanoparticles stabilised by thiols and amines for drug delivery in human body.
Education
September 2015 - December 2017
Sapienza University of Rome
Field of study
  • Inorganic and Physical Chemistry
September 2012 - September 2015
Sapienza University of Rome
Field of study
  • Chemistry

Publications

Publications (37)
Article
Full-text available
We present a one-step method to produce air-stable, large grain mixed cationic lead perovskite films and powders under ambient condition. The introduction of 2.5 wt% of Zn(II), confirmed by X-Ray Diffraction (XRD), results in stable thin films which show the same absorption and crystal structure after two weeks of storage under ambient conditions....
Article
Full-text available
It is thought that growing large, oriented grains of perovskite can lead to more efficient devices. We study MAPbI3 films fabricated via Flash Infrared Annealing (FIRA) consisting of highly oriented, large grains. Domains observed in the SEM are often misidentified with crystallographic grains, but SEM images don’t provide diffraction information....
Article
Full-text available
The bandgap tunability of mixed-halide perovskites makes them promising candidates for light-emitting diodes and tandem solar cells. However, illuminating mixed-halide perovskites results in the formation of segregated phases enriched in a single halide. This segregation occurs through ion migration, which is also observed in single-halide composit...
Article
Full-text available
Mixing iodide and bromide in halide perovskite semiconductors is an effective strategy to tune their band gap; therefore, mixed-halide perovskites hold great promise for color-tunable LEDs and tandem solar cells. However, the band gap of mixed-halide perovskites is unstable under (sun-)light, since the halides segregate into domains of different ba...
Preprint
Full-text available
Hot-carrier cooling (HCC) in metal halide perovskites in the high-density regime is significantly slower compared to conventional semiconductors. This effect is commonly attributed to a hot-phonon bottleneck but the influence of the lattice properties on the HCC behaviour is poorly understood. Using pressure-dependent transient absorption spectrosc...
Article
Full-text available
Halide double perovskites, A2MIMIIIX6, offer a vast chemical space for obtaining unexplored materials with exciting properties for a wide range of applications. The photovoltaic performance of halide double perovskites has been limited due to the large and/or indirect bandgap of the presently known materials. However, their applications extend beyo...
Article
Full-text available
Layered Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) hybrid perovskite are promising materials for optoelectronic applications due to their modular structure. To fully exploit their functionality, mechanical stimuli could be used to control their properties without changing the composition. However, the responsiveness of these systems to pressure...
Article
Full-text available
Layered Hybrid Perovskites Mechanical pressure can be a tool for tailoring optoelectronic properties of layered hybrid perovskites without changing their composition. In article number 2108720, Bruno Ehrler, Jovana V. Milić, and co‐workers demonstrate that Dion–Jacobson and Ruddlesden–Popper perovskites based on 1,4‐phenylenedimethylammonium and be...
Article
Full-text available
Halide alloying in metal halide perovskites is a useful tool for optoelectronic applications requiring a specific bandgap. However, mixed-halide perovskites show ion migration in the perovskite layer, leading to phase segregation and reducing the long-term stability of the devices. Here, we study the ion migration process in methylammonium-based mi...
Article
Full-text available
Patterning materials with different properties in a single film is a fundamental challenge and essential for the development of next‐generation (opto)electronic functional components. This work introduces the concept of ion exchange lithography and demonstrates spatially controlled patterning of electrically insulating films and semiconductors with...
Article
Full-text available
Hot-carrier cooling (HCC) in metal halide perovskites above the Mott transition is significantly slower than in conventional semiconductors. This effect is commonly attributed to a hot-phonon bottleneck, but the influence of the lattice properties on the HCC behavior is poorly understood. Using pressure-dependent transient absorption spectroscopy,...
Article
Full-text available
Ion migration in perovskite layers can significantly reduce the long-term stability of the devices. While perovskite composition engineering has proven an interesting tool to mitigate ion migration, many optoelectronic devices require a specific bandgap and thus require a specific perovskite composition. Here, we look at the effect of grain size to...
Article
Full-text available
Understanding and controlling the crystallization of organic-inorganic perovskite materials is important for their function in optoelectronic applications. This control is particularly delicate in scalable single-step thermal annealing methods. In this work, the crystallization mechanisms of flash infrared-annealed perovskite films, grown on substr...
Article
Organic semiconductors exhibit properties of individual molecules and extended crystals simultaneously. The strongly bound excitons they host are typically described in the molecular limit, but excitons can delocalize over many molecules, raising the question of how important the extended crystalline nature is. Using accurate Green's function based...
Article
Full-text available
Solar cells based on metal halide perovskites often show excellent efficiency but poor stability. This degradation of perovskites devices has been associated with the migration of mobile ions. MAPbBr3 perovskite materials are significantly more stable under ambient conditions than MAPbI3. In this work we use Transient Ion Drift (TID) to quantify th...
Preprint
Full-text available
The bandgap tunability of mixed-halide perovskites makes them promising candidates for light emitting diodes and tandem solar cells. However, illuminating mixed-halide perovskites results in the formation of segregated phases enriched in a single-halide. This segregation occurs through ion migration, which is also observed in single-halide composit...
Preprint
Full-text available
Organic semiconductors exhibit properties of individual molecules and extended crystals simultaneously. The strongly bound excitons they host are typically described in the molecular limit, but excitons can delocalize over many molecules, raising the question of how important the extended crystalline nature is. Using accurate Green's function based...
Preprint
Full-text available
Mixing iodide and bromide in halide perovskite semiconductors is an effective strategy to tune their bandgap, therefore mixed-halide perovskites hold great promise for color-tunable LEDs and tandem solar cells. However, the bandgap of mixed-halide perovskites is unstable under (sun-)light, since the halides segregate into domains of different bandg...
Article
III‐V semiconductor family has composition and size dependent optoelectronic properties ideal for a variety of applications in photonics and electronics. Due to the ever‐increasing demand for nanophotonic and nanoelectronic devices, new crystal growth techniques have been proposed to tackle economical disadvantages of the more traditional methods....
Preprint
p>III-V semiconductor family has composition and size dependent optoelectronic properties ideal for a variety of applications in photonics and electronics. Due to the ever-increasing demand for nanophotonic and nanoelectronic devices, new crystal growth techniques have been proposed to tackle economical disadvantages of the more traditional methods...
Article
We use ultrasensitive electron backscatter diffraction (EBSD) to map the local crystal orientations, grains, and grain boundaries in CH3NH3PbI3 (MAPI) perovskite thin films. Although the true grain structure is broadly consistent with the morphology visible in scanning electron microscopy (SEM), the inverse pole figure maps taken with EBSD reveal g...
Preprint
Full-text available
It is thought that growing large, oriented grains of perovskite can lead to more efficient devices. We study MAPbI3 films fabricated via Flash Infrared Annealing (FIRA) consisting of highly oriented, large grains. Domains observed in the SEM are often misidentified with crystallographic grains, but SEM images don't provide diffraction information....
Conference Paper
It is thought that growing large, oriented grains of perovskite can lead to more efficient devices. We compare two model systems, randomly oriented, small grain MAPbI3 films fabricated via antisolvent dripping (AS) and MAPbI3 films fabricated via Flash Infrared Annealing (FIRA) consisting of highly oriented, large grains. We measure the grain size,...
Article
Full-text available
In this work we employ vacuum deposited Au nanoparticles (~4 nm) to control the defect density on the surface of hydrothermally synthesized ZnO nanorod arrays (ZnO-NR) which are of interest for electron transport layers in perovskite solar cells. Using a combination of photoluminescence spectroscopy, X-ray photoelectron spectroscopy, and ultraviole...
Article
Ion migration in halide perovskite films leads to device degradation and impedes large scale commercial applications. We use transient ion-drift measurements to quantify activation energy, diffusion coefficient, and concentration of mobile ions in methylammonium lead triiodide (MAPbI3) perovskite solar cells, and find that their properties change c...
Article
Full-text available
Recent work of ten different groups shows that the application of zinc-halides in lead perovskite materials results in a contraction of the d-space, stronger interaction with the organic cation, improved crystallization with larger crystal domains, a Goldschmidt factor closer to unity, smoother and denser thin films and an even distribution of Zn(I...

Questions

Question (1)
Question
Hello everyone,
I have recently observed that during the acquisition of the EBSD map, the Kikuchi lines which were present and clearly visible before the scan, they disappear.
Before starting the scan I usually check in spot mode the presence of lines by clicking randomly in the region I will measure. However, if i stay few seconds on the same spot (or start a measurement), I see the lines disappear. I guess it is something due to the exposure to the electron beam. Funny enough, after they disappear, if I change spot and then I come back to the first one they are back until they disappear again. This is the first time that I have this problem. Someone has ideas about what could be the reason? The sample is a 100nm film of Ruthenium.

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Projects

Projects (3)
Project
We combine Electron Back-Scattered Diffraction (EBSD) equipped with a direct electron detection system - essential for electron beam sensitive materials - and other spatially resolved techniques (photoluminescence and lifetime) to investigate the effect of crystal orientation, grain size, local misorientations and other structural properties on the optoelectronics of perovskite.
Project
What is the role of pressure on the ultrafast charge dynamics of perovskite? Among all, pressure compress the unit cell but also changes the electron-phonon coupling in the material. We investigate how this affect charge carrier cooling in various perovskite compositions trying to understand the fundamental properties of the material as function of pressure.