Publications de Mahdi Zamani | EPFL Graph Search

Investigating the Effect of Crystal Morphology on Optoelectronic Properties of Zinc Phosphide Thin Films via Optical-pump Terahertz Probe Spectroscopy

Elias Zsolt Stutz, Jean-Baptiste Leran, Léa Buswell, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Zinc phosphide ( Zn3P2) is a promising earth-abundant material for solar cell applications but calls for the further understanding of its optoelectronic properties. In this work, we perform contact-free and noninvasive optical-pump terahertz probe (OPTP) s ...

IEEE2023

Carrier generation and collection in Zn3P2/InP heterojunction solar cells

Anna Fontcuberta i Morral, Franz-Josef Haug, Mahdi Zamani, Simon Robert Escobar Steinvall, Julien Hurni, Rajrupa Paul, Valerio Piazza, Mirjana Dimitrievska, Joel René Sapera

Zinc phosphide (Zn3P2) has been lauded as a promising solar absorber material due to its functional properties and the abundance of zinc and phosphorous. In the last 4 decades, there has not been any significant improvement in the efficiencies of Zn3P2-bas ...

ELSEVIER2023

Zn/P ratio and microstructure defines carrier density and electrical transport mechanism in earth-abundant Zn3-xP2+y thin films

Mihai Adrian Ionescu, Anna Fontcuberta i Morral, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Carlotta Gastaldi, Valerio Piazza, Mirjana Dimitrievska

Scalable and sustainable photovoltaic technologies require low-cost and earth-abundant semiconducting materials. Zinc phosphide is purported to be an absorber material with optimal photovoltaic properties. Herein we report the electrical properties of Zn3P ...

2023

Nanoscale Growth Initiation as a Pathway to Improve the Earth-Abundant Absorber Zinc Phosphide

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Growth approaches that limit the interface area between layers to nanoscale regions are emerging as a promising pathway to limit the interface defect formation due to mismatching lattice parameters or thermal expansion coefficient. Interfacial defect mitig ...

AMER CHEMICAL SOC2022

Showcasing the optical properties of monocrystalline zinc phosphide thin films as an earth-abundant photovoltaic absorber

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Léa Buswell, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Zinc phosphide, Zn3P2, is a semiconductor with a high absorption coefficient in the spectral range relevant for single junction photovoltaic applications. It is made of elements abundant in the Earth's crust, opening up a pathway for large deployment of so ...

2022

Raman tensor of zinc-phosphide (Zn3P2): from polarization measurements to simulation of Raman spectra

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Santhanu Panikar Ramanandan, Rajrupa Paul, Mirjana Dimitrievska, Mischa Samuel Flór

Zinc phosphide (Zn3P2) is a II–V compound semiconductor with promising photovoltaic and thermoelectric applications. Its complex structure is susceptible to facile defect formation, which plays a key role in further optimization of the material. Raman spec ...

2022

Stoichiometry modulates the optoelectronic functionality of Zinc Phosphide (Zn3-xP2+x)

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Maria Chiara Spadaro, Simon Robert Escobar Steinvall, Santhanu Panikar Ramanandan, Rajrupa Paul, Diego Armando Sandoval Salaiza, Mirjana Dimitrievska, Mischa Samuel Flór

Predictive synthesis–structure–property relationships are at the core of materials design for novel applications. In this regard, correlations between the compositional stoichiometry variations and functional properties are essential for enhancing the perf ...

2022

Modeling the Shape Evolution of Selective Area Grown Zn3P2 Nanoislands

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Vladimir Dubrovskii

Selective area growth of zinc phosphide (Zn3P2) on InP provides a pathway to high-quality semiconductor nanostructures and textured thin films made of earth-abundant elements. In the precoalescence stage, Zn3P2 emerges in the form of nanoislands undergoing ...

AMER CHEMICAL SOC2021

The path towards 1 µm monocrystalline Zn3 P2 films on InP: substrate preparation, growth conditions and luminescence properties

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Reza Zamani, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Semiconductors made with earth abundant elements are promising as absorbers in future large-scale deployment of photovoltaic technology. This paper reports on the epitaxial synthesis of monocrystalline zinc phosphide (Zn_3 P_2) films with thicknesses up to ...

2021

Rotated domains in selective area epitaxy grown Zn3P2: formation mechanism and functionality

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul

Zinc phosphide (Zn3P2) is an ideal absorber candidate for solar cells thanks to its direct bandgap, earth-abundance, and optoelectronic characteristics, albeit it has been insufficiently investigated due to limitations in the fabrication of high-quality ma ...

ROYAL SOC CHEMISTRY2021

Crystalline Order in Compound Semiconductors in Nanoscale Structures and Thin Films

Mahdi Zamani

Semiconductors materials and devices are essential building blocks for many of the technologies deeply embedded in modern life. Improving the performance of semiconductor devices requires a deeper understanding of the fundamental mechanisms controlling the ...

EPFL2021

Raman spectroscopy and lattice dynamics calculations of tetragonally-structured single crystal zinc phosphide (Zn3P2) nanowires

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Earth-abundant and low-cost semiconductors, such as zinc phosphide (Zn3P2), are promising candidates for the next generation photovoltaic applications. However, synthesis on commercially available substrates, which favors the formation of defects, and cont ...

2020

Towards defect-free thin films of the earth-abundant absorber zinc phosphide by nanopatterning

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Reza Zamani, Martin George Friedl, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Valerio Piazza

Large-scale deployment of thin-film photovoltaics will be facilitatedthrough earth-abundant components. Herein, selective area epitaxyand lateral overgrowth epitaxy are explored for the growth of zincphosphide (Zn3P2), a promising earth-abundant absorber. ...

2021

van der Waals Epitaxy of Earth-Abundant Zn3P2 on Graphene for Photovoltaics

Cyril Cayron, Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Nicolas Philippe Laurent Humblot, Roland Logé, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Shreyas Sanjay Joglekar

Earth-abundant semiconducting materials are a potential solution for large-scale deployment of solar cells at a lower cost. Zinc phosphide (Zn3P2) is one such Earth-abundant material with optoelectronic properties suitable for photovoltaics. Herein, we rep ...

2020

PriFi: Low-Latency Anonymity for Organizational Networks

Jean-Pierre Hubaux, Ludovic Barman, Ennan Zhai, Italo Ivan Dacosta Petrocelli, Bryan Alexander Ford, Mahdi Zamani, Apostolos Pyrgelis

Organizational networks are vulnerable to traffic-analysis attacks that enable adversaries to infer sensitive information from the network traffic – even if encryption is used. Typical anonymous communication networks are tailored to the Internet and are p ...

2020

Dataset for "Towards defect-free thin films of the earth-abundant absorber zinc phosphide by nanopatterning"

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Reza Zamani, Martin George Friedl, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Valerio Piazza

Raw data associated with the publication "Towards defect-free thin films of the earth-abundant absorber zinc phosphide by nanopatterning", first published in Nanoscale Advances on the 23nd November 2020. ...

Zenodo2020

Dataset for "Heterotwin Zn3P2 superlattice nanowires: the role of indium insertion in the superlattice formation mechanism and their optical properties"

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Nicolas Tappy, Reza Zamani, William Craig Carter, Mahdi Zamani, Lea Ghisalberti, Simon Robert Escobar Steinvall, Rajrupa Paul

Raw data associated with the publication "Heterotwin Zn3P2 superlattice nanowires: the role of indium insertion in the superlattice formation mechanism and their optical properties", published in Nanoscale on the 22nd October 2020. ...

Zenodo2020

Multiple morphologies and functionality of nanowires made from earth-abundant zinc phosphide

Thomas La Grange, Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Nicolas Tappy, Reza Zamani, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul

Semiconductors made of earth-abundant elements, such as zinc phosphide, have the potential to substitute less abundant, highly functional compound semiconductors such as InAs or InP. Compound semiconductors in the form of nanowires could revolutionise appl ...

2020

3D Ordering at the Liquid-Solid Polar Interface of Nanowires

Cécile Hébert, Duncan Thomas Lindsay Alexander, Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Nicolas Tappy, Martin George Friedl, Michele Ceriotti, Luca Francaviglia, Giulio Imbalzano, Mahdi Zamani, Lea Ghisalberti, Sara Marti Sanchez

The nature of the liquid-solid interface determines the characteristics of a variety of physical phenomena, including catalysis, electrochemistry, lubrication, and crystal growth. Most of the established models for crystal growth are based on macroscopic t ...

Wiley2020

Dataset for "Raman spectroscopy and lattice dynamics calculations of tetragonally-structured single crystal zinc phosphide (Zn3P2) nanowires"

Anna Fontcuberta i Morral, Elias Zsolt Stutz, Jean-Baptiste Leran, Mahdi Zamani, Simon Robert Escobar Steinvall, Rajrupa Paul, Mirjana Dimitrievska

Earth-abundant and low-cost semiconductors, such as zinc phosphide (Zn3P2), are promising candidates for the next generation photovoltaic applications. However, synthesis on commercially available substrates, which favors the formation of defects, and cont ...

Zenodo2020