Publications by Endre Horvath | EPFL Graph Search

Tuning the color of high-karat gold in Au-TiO2 nanoparticle composites all the way to black

László Forró, Claudio Grimaldi, Endre Horvath, Andrzej Sienkiewicz

For centuries, artisans have harnessed gold nanoparticles to imbue their creations with the vibrant hues that captivate the eye through interactions with visible light. In modern times, these distinct optoelectronic characteristics have pivoted toward the ...

Cell Press2024

Perovskite-based detector for reactor dosimetry monitoring

László Forró, Andreas Pautz, Endre Horvath, Pavel Frajtag, Péter Szirmai, Márton Kollár

Hybrid halide perovskites have demonstrated significant efficiency in detecting a broad spectrum of high-energy radiation, including X-rays, gamma rays (γ-rays), and neutrons. Given the common occurrence of mixed radiation fields, we investigated the perfo ...

EDP Sciences2024

Effect of the Deposition of Vanadium-Oxide on the Photocatalytic Activity of TiO2 Nanotubes and Its Photodiode Performance Interfaced with CH3NH3PbI3 Single Crystal

László Forró, Endre Horvath, Pavao Roko Andricevic

In this study, we report the influence of vanadium oxide (VO), as a photosensitive component, on the photoactivity of TiO2 nanotubes (TNTs). A series of TNTs of varying tube diameter were synthesized by the anodization of titanium foils at different voltag ...

MDPI2023

Solar water purification with photocatalytic nanocomposite filter based on TiO2 nanowires and carbon nanotubes

László Forró, Luca Rossi, Andrzej Sienkiewicz, Endre Horvath, Florian Frédéric Vincent Breider, Dominique Grandjean, Miriam Gaál

Water contamination due to environmental conditions and poor waste management in certain areas of the world represents a serious problem in accessing clean and safe drinking water. This problem is especially critical in electricity-poor regions, where adva ...

2022

High-pressure investigations in CH3NH3PbX3 (X = I, Br, and Cl): Suppression of ion migration and stabilization of low-temperature structure

László Forró, Endre Horvath, Márton Kollár

Hybrid organic-inorganic halide perovskites represent a promising next-generation photovoltaic material with drawbacks for structure stability and composition concerns. Demonstrations of ion migration and molecular dynamics suggest room for structural cont ...

AMER PHYSICAL SOC2022

Fast Lead-Free Humidity Sensor Based on Hybrid Halide Perovskite

László Forró, Dragan Damjanovic, Endre Horvath, Alla Arakcheeva, Márton Kollár, Pavao Roko Andricevic, Trpimir Ivsic

An environmentally friendly analog of the prominent methylammonium lead halide perovskite, methylammonium bismuth bromide (MA3Bi2Br9), was prepared and investigated in the form of powder, single crystals and nanowires. Complete characterization via synchro ...

2022

“Forbidden” Polarisation and Extraordinary Piezoelectric Effect in Organometallic Lead Halide Perovskites

László Forró, Dragan Damjanovic, Endre Horvath, Márton Kollár, Lukas Riemer

Organometallic lead halide perovskites are highly efficient materials for solar cells and other optoelectronic applications due to their high quantum efficiency and exceptional semiconducting properties. A peculiarity of these perovskites is the substantia ...

2022

Ultrasensitive 3D Aerosol-Jet-Printed Perovskite X-ray Photodetector

László Forró, Endre Horvath, Alla Arakcheeva, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic, Anastasiia Glushkova

X-ray photon detection is important for a wide range of applications. The highest demand, however, comes from medical imaging, which requires cost-effective, high-resolution detectors operating at low-photon flux, therefore stimulating the search for novel ...

2021

Highly flexible CH3NH3PbI3 micro- and nanowires

László Forró, Luca Rossi, Endre Horvath, Luka Ciric, Massimo Spina, Márton Kollár, Raphaël Foschia

CH3NH3PbI3 is known to be very efficient in photon to electron conversion, which makes it extremely popular in opto-electronic applications ranging from solar cells to photodetectors. The material is very brittle in bulk, single crystalline, and thin film ...

AIP Publishing2021

Fighting Health Hazards in Lead Halide Perovskite Optoelectronic Devices with Transparent Phosphate Salts

László Forró, Endre Horvath, Márton Kollár, Pavao Roko Andricevic, Xavier François Mettan

Organic-inorganic lead halide perovskite (CH3NH3PbI3) solar cells have surpassed 25% power conversion efficiency, being ready for industrial-scale production of cheap photovoltaic (PV) panels. In this action, the major hurdle is its lead content, which in ...

AMER CHEMICAL SOC2021