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Endre Horvath

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Related publications (78)

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Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

László Forró, Bálint Náfrádi, Endre Horvath, Konrad Domanski, Márton Kollár, Pavao Roko Andricevic

Highly ordered, anodically grown TiO2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (

2019

Preparation of titania covered multi-walled carbon nanotube thin films

László Forró, Arnaud Magrez, Endre Horvath

The aim of this work was to investigate the effects of relative humidity on the formation of titania layers on the surface of multi-walled carbon nanotubes under regulated conditions in a sealed system. Reactive precursor compounds such as titanium (IV) ox ...

Elsevier Sci Ltd2015

Light-induced charge transfer at the CH3NH3PbI3/TiO2 interface-a low-temperature photo-electron paramagnetic resonance assay

László Forró, Andrzej Sienkiewicz, Bálint Náfrádi, Endre Horvath, Márton Kollár, Philippe Bugnon, Péter Szirmai, Pavao Roko Andricevic, Lidia Rocoffort de Vinnière, Anastasiia Glushkova, Konstantins Mantulnikovs

The performance of organic-inorganic metal halide perovskites-based (MHPs) photovoltaic devices critically depends on the design and material properties of the interface between the light-harvesting MHP layer and the electron transport layer (ETL). Therefo ...

2020

Methylammonium Lead Iodide for Efficient X-ray Energy Conversion

László Forró, Endre Horvath, Bálint Náfrádi

We report on photocurrent generation by X-ray irradiation in methylammonium lead iodide CH3NH3PbI3 single crystals. We observed 75% of charge collection efficiency in millimeter sized samples. This efficiency is partially due to the high photon absorption ...

American Chemical Society2015

Infrared and 2-Dimensional Correlation Spectroscopy Study of the Effect of CH3NH3PbI3 and CH3NH3SnI3 Photovoltaic Perovskites on Eukaryotic Cells

László Forró, Endre Horvath, Ryma Iness Benmessaoud

We studied the effect of the exposure of human A549 and SH-SY5Y cell lines to aqueous solutions of organic/inorganic halide perovskites CH3NH3PbI3 (MAPbI3) and CH3NH3SnI3 (MASnI3) at the molecular level by using Fourier transform infrared microspectroscopy ...

2020

Clean, cleaved surfaces of the photovoltaic perovskite

László Forró, Henrik Moodysson Rønnow, Jeremy Luterbacher, Bálint Náfrádi, Endre Horvath, Jan Hugo Dil, Stefan Peter Muff, Andrew Patton Weber, Márton Kollár, Luka Ciric, Benjamin Pierre Le Monnier

The surface of a material is not only a window into its bulk physical properties, but also hosts unique phenomena important for understanding the properties of a solid as a whole. Surface sensitive techniques, like ARPES (Angle-resolved photoemission spect ...

Nature Research2017

Long term stabilization of reaction center protein photochemistry by carbon nanotubes

László Forró, Arnaud Magrez, Endre Horvath

The long term stability and the redox interaction between single walled carbon nanotubes (SWNTs) and photosynthetic reaction center proteins (RCs) purified from purple bacterium Rhodobacter sphaeroides R-26 in the SWNT/RC complex has been investigated. The ...

2011

Ultrasensitive 1D field-effect phototransistors: CH3NH3PbI3 nanowire sensitized individual carbon nanotubes

László Forró, Bálint Náfrádi, Endre Horvath, Richard Gaal, Massimo Spina

Field-effect phototransistors were fabricated based on individual carbon nanotubes (CNTs) sensitized by CH3NH3PbI3 nanowires (MAPbI(3)NWs). These devices represent light responsivities of R = 7.7 x 10(5) A W-1 under low-lighting conditions in the nW mm(-2) ...

2016

Tuning of the Thermoelectric Figure of Merit of CH3NH3MI3 (M=Pb,Sn) Photovoltaic Perovskites

László Forró, Davor Pavuna, Endre Horvath, Bálint Náfrádi, Andrea Pisoni, Massimo Spina, Xavier François Mettan, Péter Krisztián Matus

The hybrid halide perovskites, the very performant compounds in photovoltaic applications, possess large Seebeck coefficient and low thermal conductivity, making them potentially interesting high figure of merit (ZT) materials. For this purpose, one needs ...

American Chemical Society2015

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, Veljko Djokic, Milica Vasiljevic

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

Optical detection of charge dynamics in CH3NH3PbI3/carbon nanotube composites

László Forró, Bálint Náfrádi, Endre Horvath, Márton Kollár, Pavao Roko Andricevic

We have investigated the optical absorption of metallic and semiconducting carbon nanotubes/CH3NH3PbI3 micro- and nanowire composites. Upon visible light illumination semiconducting carbon nanotube based samples show a photo-induced doping, originating fro ...

2017

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

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

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

Morphology and Photoluminescence of CH3NH3PbI3 Deposits on Nonplanar, Strongly Curved Substrates

László Forró, Endre Horvath, Andrzej Sienkiewicz, Márton Kollár, Luka Ciric, Anastasiia Glushkova, Konstantins Mantulnikovs, Péter Krisztián Matus

2018

Tuning ferromagnetism at room temperature by visible light

László Forró, Bálint Náfrádi, Endre Horvath, Massimo Spina, Andrea Pisoni, Péter Szirmai, Xavier François Mettan

Most digital information today is encoded in the magnetization of ferromagnetic domains. The demand for ever-increasing storage space fuels continuous research for energy-efficient manipulation of magnetism at smaller and smaller length scales. Writing a b ...

National Academy of Sciences2020

Thermal coarsening of individual titanate nanowires and their assemblies: Surface vs. bulk diffusion

László Forró, Luca Rossi, Endre Horvath, Massimo Spina, Sergiy Katrych, Laurent Syavoch Bernard, Lidia Rocoffort de Vinnière

The thermal coarsening of titanate nanowires was investigated from room temperature to 1000 degrees C by AFM, SEM, XRD and Raman spectroscopy. Phase transformation kinetics and the external morphology were studied in two configurations: i) as individual an ...

2020

Rapid thickness reading of CH3NH3PbI3 nanowire thin films from color maps

László Forró, Bálint Náfrádi, Claudio Grimaldi, Endre Horvath, Massimo Spina

Hybrid halide perovskite photovoltaic materials show a remarkable light conversion efficiency in various optoelectronic devices. In the fabrication of these solar cells, light emitting diodes, laser and photodetector prototypes the thickness of the perovsk ...

Wiley-VCH Verlag2016

Electron Microscopy Investigation of Coated Multiwall Carbon Nanotubes Prepared by Reactive Ball Milling

László Forró, Endre Horvath, Jin Won Seo

Homogeneous and stable inorganic coating of SiO2, Al2O3 and TiO2 was obtained on the surface of multiwall carbon nanotubes (MWNTs) by mechanically mixing them with precursor compounds in a planetary ball mill and by subsequent hydrolysis. Detailed studies ...

AMER SCIENTIFIC PUBLISHERS2019

Magnetic-photoconductive material, magneto-optical data storage device, magneto-optical data storage system, and light-tunable microwave components comprising a photoconductive-ferromagnetic device

László Forró, Endre Horvath, Bálint Náfrádi

The present invention concerns a magnetic-photoconductive material including orientable magnetic moments or spins, the material being configured to generate photo-carriers permitting to orientate or re-orientate the magnetic moments or spins at a material ...

2016

Photosynthetic reaction centre/carbon nanotube bundle composites

László Forró, Arnaud Magrez, Endre Horvath, Dóra Fejes-Kajtár

Since their discovery, carbon nanotubes (CNTs) have attracted intense attention to broad range of potential applications. In contrast to the 1D isolated single-walled carbon nanotubes (SWCNT), 2D films or bundles made of thousands of tubes have been introd ...

Wiley-V C H Verlag Gmbh2014

Microengineered CH3NH3PbI3 Nanowire/Graphene Phototransistor for Low-Intensity Light Detection at Room Temperature

László Forró, Arnaud Magrez, Bálint Náfrádi, Endre Horvath, Richard Gaal, Massimo Spina, Mario Joe Lehmann, Laurent Syavoch Bernard

The first hybrid phototransistors are reported where the performance of a network of photoactive CH3NH3PbI3 nanowires is enhanced by CVD-grown monolayer graphene. These devices show responsivities as high as ≈2.6 × 106 A W- ...

2015