Publications related to Enhanced photon emission from site- and energy-controlled InGaAs/GaAs quantum dots coupled to GaAs nanowires

Related publications (15)

Grayscale nanopatterning for strain-engineered 2D materials

Semiconductor innovation is shifting from traditional dimensional scaling toward novel architectures and materials as lithography nears its physical limits. FinFETs and GAAFETs have marked key milestones, with scaling now progressing through 3D stacking. M ...

EPFL2025

Exciton migration in two-dimensional materials

Giovanni Consalvo Cistaro

Excitons play an essential role in the optical response of two-dimensional materials. These are bound states showing up in the band gaps of many-body systems and are conceived as quasiparticles formed by an electron and a hole. By performing real-time simu ...

Nature Portfolio2024

In Situ Synthesis of CuxO/N Doped Graphdiyne with Pyridine N Configuration for Ammonia Production via Nitrate Reduction

Sophia Haussener, Jian Li, Roberto Valenza

Electroreduction of nitrate to ammonia provides an interesting pathway for wastewater treatment and valorization. Cu-based catalysts are active for the conversion of NO3− to NO2− but suffer from an inefficient hydrogenation process of NO2−. Herein, CuxO/N- ...

2024

Interactions between aluminium and fired passivating contacts during fire-through metallization

Christophe Ballif, Franz-Josef Haug, Aïcha Hessler-Wyser, Mario Joe Lehmann, Sofia Libraro

Replacing silver metallization with earth-abundant materials in Si solar cells is a critical step towards the sustainable growth of photovoltaics. In this work, we investigate fire-through processes using Al for the metallization of solar cells with p-type ...

ELSEVIER2023

Efficient and Stable Perovskite Solar Cells by Tailoring of Interfaces

Mohammad Khaja Nazeeruddin, Jianxing Xia

The interface tailoring is crucial for the efficiency and stability of Perovskite Solar Cells (PSCs). The reported interface engineering primarily focuses on the energy level turning and trap state passivation to improve the photovoltaic performance of PSC ...

Wiley-V C H Verlag Gmbh2023

Halide exchange in the passivation of perovskite solar cells with functionalized ionic

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Rosario Scopelliti, Andreas Züttel, Farzaneh Fadaei Tirani, Zhaofu Fei, Yi Zhang, Hiroyuki Kanda, Bin Ding, Wen Luo, Mo Li, Mousa Abdulla M E Abuhelaiqa

Applying additives to perovskite precursor solutions is an effective way to passivate perovskite films for the construction of perovskite solar cells (PSCs) with increased power-conversion efficiencies (PCEs) and enhanced stabilities. Ionic liquids (ILs) w ...

ELSEVIER2022

Ultrarapid crystallization of low-dimensional perovskite with excellent stability for future high-throughput fabrication

Mohammad Khaja Nazeeruddin, Yi Zhang

Perovskite solar cells (PSCs) as an emerging photovoltaic technique have achieved exceptional power conversion efficiency (PCE) up to 25.7% after fast development over the past decade. But currently some critical issues are still not well addressed in term ...

ELSEVIER2022

Porous Nitride Light-Emitting Diodes

Anna Fontcuberta i Morral, Nicolas Tappy

A porous InGaN/GaN blue light-emitting diode is demonstrated using selective area sublimation. Transmission electron microscopy reveals that the structure is porous down to the Si substrate; however, the porosity is higher in the GaN buffer, while smaller ...

2022

Interfacial passivation of wide-bandgap perovskite solar cells and tandem solar cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Hiroyuki Kanda, Cristina Roldán Carmona

Perovskite/silicon tandem solar cells offer the potential to surpass the power conversion efficiency (PCE) of single-junction solar devices beyond the Shockley-Queisser limit at relatively low costs. However, obtaining wide-bandgap materials that provide i ...

Royal Society of Chemistry2021

Towards industrialization of perovskite solar cells using slot die coating

Frank Nüesch, Jakob Heier

Carbon-based hole transport layer-free carbon mesoscopic perovskite solar cells (MPSCs) are considered to be cell architectures with high potential for commercialization, due to their enhanced stability. In the standard process for large area and module fa ...

Royal Society of Chemistry2020

Photovoltaic organic interface for neuronal stimulation in the near-infrared

Diego Ghezzi, Marta Jole Ildelfonsa Airaghi Leccardi, Laura Ferlauto, Naïg Aurelia Ludmilla Chenais, Elodie Geneviève Zollinger

Organic materials, such as conjugated polymers, are attractive building blocks for bioelectronic interfaces. In particular, organic semiconductors show excellent performance in light-mediated excitation and silencing of neuronal cells and tissues. However, ...

2020

Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites

Michael Graetzel

Halide perovskites possess enormous potential for various optoelectronic applications. Presently, a clear understanding of the interplay between the lattice and electronic effects is still elusive. Specifically, the weakly absorbing tail states and dual em ...

Springer2019

Dataset for "Tuning adatom mobility and nanoscale segregation by twin formation and polytypism"

Anna Fontcuberta i Morral, Federico Matteini, Luca Francaviglia

Nanoscale variations in the composition of an AlxGa1−xAs shell around a GaAs nanowire affect the nanowire functionality and can lead to the formation of localized quantum emitters. These composition fluctuations can be the consequence of variations of crys ...

Zenodo2018

Additive Fabrication of Silicon Pillars on Monocrystalline Silicon by Direct Laser Melting

Marie Camille Laëtitia Le Dantec

Additive Manufacturing (AM) is an emerging part production technology that offers many ad-vantages such as high degree of customization, material savings and design of 3D highly complex structures. However, AM is a complex multiphysics process. Therefore, ...

EPFL2018

Integration of High-performance Optoelectronic Nanowire-based Devices at Optical Fiber Tips

Fabien Sorin, Wei Yan, Inès Richard

We establish a facile and robust approach to integrate high-performance monocrystalline semiconducting nanowire-based optoelectronic devices at optical fiber tips. The multi-functional fibers exhibit excellent optical and optoelectronic properties, leading ...

OSA Publishing2018