Publications by Márton Kollár

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

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

Ultralong Charge Carrier Recombination Time in Methylammonium Lead Halide Perovskites

László Forró, Andrzej Sienkiewicz, Márton Kollár, Ferenc Simon

Due to their exceptional photovoltaic properties, metal halide perovskites (MHPs) are extensively studied for their potential applications in solar cells. In recent years, the power conversion efficiencies of MHPs-based solar cells rapidly increased from t ...

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

Hybrid halide perovskite neutron detectors

László Forró, Andreas Pautz, Endre Horvath, Andrzej Sienkiewicz, Pavel Frajtag, Bálint Náfrádi, Márton Kollár, Pavao Roko Andricevic

Interest in fast and easy detection of high-energy radiation (x-, gamma-rays and neutrons) is closely related to numerous practical applications ranging from biomedicine and industry to homeland security issues. In this regard, crystals of hybrid halide pe ...

Nature Portfolio2021

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

László Forró, Endre Horvath, Andrzej Sienkiewicz, Bálint Náfrádi, Philippe Bugnon, Péter Szirmai, Márton Kollár, Pavao Roko Andricevic, 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