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Univ.-Prof. DI Dr. Paul Hartmann

Funktion

Direktor MATERIALS

Telefon

+43(316)876-3001

E-Mail

Paul.Hartmann@joanneum.at

Adresse

Franz-Pichler-Straße 30, 8160, Weiz
+43 316 876-3000
materials@joanneum.at

Über die Person

Paul Hartmann ist seit 2010 Institutsdirektor des Instituts MATERIALS. Er schloss sein Studium der Technischen Physik 1991 an der TU Graz ab und absolvierte 1995 sein Doktoratsstudium an der KFU Graz, Institut für Experimentalphysik in Kooperation mit der AVL List Medical Instruments. Im Anschluss an sein Studium war er im F&E-Management bei AVL List Medial Instruments, Roche Diagnostics, Zumtobel LED und Tridonic tätig. Seit 2013 ist er Vorstandsmitglied von Photonics Austria, der österreichischen Plattform für Lichttechnologien. Im Zeitraum 2018 bis 2023 war er Universitätsprofessor für das Fach Technologien der Nanomaterialien an der TU Graz.

Publikationen

Materials
2025

Screen and stencil printed graphene heat spreaders on printed circuit boards for lowering of light emitting diode temperatures

Autor*innen: Reinhard Kaindl, David Dergez, Tushar Gupta, Songfeng Pei, Peng-Xiang Hou, Jinhong Du, Chang Liu, Bernhard Fickl, Martin Nastran, Ya Liu, Alexander Blümel, Dominik Eder, Johan Liu, Wencai Ren, Paul Hartmann, Wolfgang Waldhauser, Dietmar Kieslinger, Bernhard C. Bayer
Screen and stencil printed graphene heat spreaders on printed circuit boards for lowering of light emitting diode temperatures
Materials
2022

Finite Element Simulations of Filling and Demolding in Roll-to-Roll UV Nanoimprinting of Micro- and Nanopatterns

Autor*innen: Götz, Johannes; Alvarez Rueda, Asier; Ruttloff, Stephan; Kuna, Ladislav; Belegratis, Maria; Palfinger, Ursula; Nees, Dieter; Hartmann, Paul; Stadlober, Barbara
Finite Element Simulations of Filling and Demolding in Roll-to-Roll UV Nanoimprinting of Micro- and Nanopatterns
Materials
2021

Aerosol Jet Printing of Graphene and Carbon Nanotube Patterns on Realistically Rugged Substrates

Autor*innen: Kaindl, Reinhard; Gupta, Tushar; Blümel, Alexander; Pei, Songfeng; Hou, Peng-Xiang; Du, Jinhong; Liu, Chang; Patter, Paul; Popovic, Karl; Dergez, David; Elibol, Kenan; Schafler, Erhard; Liu, Johan; Eder, Dominik; Kieslinger, Dietmar; Ren, Wencai; Hartmann, Paul; Waldhauser, Wolfgang; Bayer, Bernhard C.
Aerosol Jet Printing of Graphene and Carbon Nanotube Patterns on Realistically Rugged Substrates
Materials
2017

Optical design of freeform micro-optical elements and their fabrication combining maskless laser direct write lithography and replication by imprinting

Autor*innen: Kuna, Ladislav; Leiner, Claude; Nemitz, Wolfgang; Reil, Frank; Hartmann, Paul; Wenzl, Franz-Peter; Sommer, Christian
Optical design of freeform micro-optical elements and their fabrication combining maskless laser direct write lithography and replication by imprinting
Materials
2016

The impact of the thermal conductivities of the color conversion elements of phosphor converted LEDs under different current driving schemes

Autor*innen: Fulmek, Paul; Nicolics, Johann; Nemitz, Wolfgang; Schweitzer, Susanne; Sommer, Christian; Hartmann, Paul; Schrank, Franz; Wenzl, Franz P.
The impact of the thermal conductivities of the color conversion elements of phosphor converted LEDs under different current driving schemes
Materials
2016

Multiscale optical simulation settings: challenging applications handled with an iterative ray-tracing FDTD interface method

Autor*innen: Leiner, Claude; Nemitz, Wolfgang; Schweitzer, Susanne; Kuna, Ladislav; Wenzl, Franz P.; Hartmann, Paul; Satzinger, Valentin; Sommer, Christian
Multiscale optical simulation settings: challenging applications handled with an iterative ray-tracing FDTD interface method
Materials
2015

Simulation based experimental study of the temperature and power density distribution in a high-power LED

Autor*innen: Fulmek, Paul; Nemitz, Wolfgang; Wenzl, Franz Peter; Schweitzer, Susanne; Hartmann, Paul; Nicolics, Johann
Simulation based experimental study of the temperature and power density distribution in a high-power LED
Materials
2015

Chromaticity coordinate maintenance of phosphor converted LEDs by a self-compensation approach

Autor*innen: Nemitz, Wolfgang; Sommer, Christian; Schweitzer, Susanne; Hartmann, Paul; Fulmek, Paul; Nicolics, Johann; Wenzl, Franz P.
Chromaticity coordinate maintenance of phosphor converted LEDs by a self-compensation approach
Materials
2014

A comprehensive discussion on colour conversion element design of phosphor converted LEDs

Autor*innen: Schweitzer, Susanne; Sommer, Christian; Hartmann, Paul; Fulmek, Paul; Nicolics, Johann; Pachler, Peter; Hoschopf, Hans; Schrank, Franz; Langer, Gregor; Wenzl, Franz P.
A comprehensive discussion on colour conversion element design of phosphor converted LEDs
Materials
2014

A Simulation Procedure Interfacing Ray-Tracing and Finite-Difference Time-Domain Methods for a Combined Simulation of Diffractive and Refractive Optical Elements

Autor*innen: Leiner, Claude; Schweitzer, Susanne; Wenzl, Franz-Peter; Hartmann, Paul; Hohenester, Ulrich; Sommer, Christian
A Simulation Procedure Interfacing Ray-Tracing and Finite-Difference Time-Domain Methods for a Combined Simulation of Diffractive and Refractive Optical Elements
Materials
2014

Multiple interfacing between classical ray-tracing and wave-optical simulation approaches: a study on applicability and accuracy

Autor*innen: Leiner, Claude; Nemitz, Wolfgang; Schweitzer, Susanne; Wenzl, Franz P.; Hartmann, Paul; Hohenester, Ulrich; Sommer, Christian
Multiple interfacing between classical ray-tracing and wave-optical simulation approaches: a study on applicability and accuracy
Materials
2014

Plasma Polymerization Inside Tubes in Hexamethyldisiloxanes and Ethyne Glow Discharges: Effects of Deposition Atmosphere on Wetting and Ageing in Solvents

Autor*innen: Lackner, Juergen M.; Wiesinger, Martin; Kaindl, Reinhard; Waldhauser, Wolfgang; Heim, Daniel; Hartmann, Paul
Plasma Polymerization Inside Tubes in Hexamethyldisiloxanes and Ethyne Glow Discharges: Effects of Deposition Atmosphere on Wetting and Ageing in Solvents
Materials
2013

On the Thermal Load of the Color-Conversion Elements in Phosphor-Based White Light-Emitting Diodes

Autor*innen: Fulmek, Paul; Sommer, Christian; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Langer, Gregor; Nicolics, Johann; Wenzl, Franz P.
On the Thermal Load of the Color-Conversion Elements in Phosphor-Based White Light-Emitting Diodes
Materials
2013

The impact of the non-linearity of the radiant flux on the thermal load of the color conversion elements in phosphor converted LEDs under different current driving schemes

Autor*innen: Wenzl, Franz P.; Sommer, Christian; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Langer, Gregor; Fulmek, Paul; Nicolics, Johann
The impact of the non-linearity of the radiant flux on the thermal load of the color conversion elements in phosphor converted LEDs under different current driving schemes
Materials
2013

TRIBOLOGY OF BIO-INSPIRED NANOWRINKLED FILMS ON ULTRASOFT SUBSTRATES

Autor*innen: Lackner, Juergen M.; Waldhauser, Wolfgang; Major, Lukasz; Teichert, Christian; Hartmann, Paul
TRIBOLOGY OF BIO-INSPIRED NANOWRINKLED FILMS ON ULTRASOFT SUBSTRATES
Materials
2013

Improvement of Color Temperature Constancy of Phosphor Converted LEDs by Adaption of the Thermo-Optic Coefficients of the Color Conversion Materials

Autor*innen: Schweitzer, Susanne; Sommer, Christian; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Wenzl, Franz P.
Improvement of Color Temperature Constancy of Phosphor Converted LEDs by Adaption of the Thermo-Optic Coefficients of the Color Conversion Materials
Materials
2013

WITHDRAWN: Bio-inspired wear protection of soft materials by hard films: Mechanical and tribological properties of nacre and multilayer Ti–TiN films

Autor*innen: Lackner, Juergen M; Waldhauser, W.; Hartmann, P.; Major, L.; Kot, Marcin
WITHDRAWN: Bio-inspired wear protection of soft materials by hard films: Mechanical and tribological properties of nacre and multilayer Ti–TiN films
Materials
2012

White light quality of phosphor converted light-emitting diodes: A phosphor materials perspective of view

Autor*innen: Sommer, Christian; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Wenzl, Franz P.
White light quality of phosphor converted light-emitting diodes: A phosphor materials perspective of view
Materials
2012

Hemocompatibility of Inorganic Physical Vapor Deposition (PVD) Coatings on Thermoplastic Polyurethane Polymers.

Autor*innen: Lackner, Juergen M.; Waldhauser, Wolfgang; Hartmann, Paul; Bruckert, Franz; Weidenhaupt, Marianne; Major, Roman; Sanak, Marek; Wiesinger, Martin; Heim, Daniel
Hemocompatibility of Inorganic Physical Vapor Deposition (PVD) Coatings on Thermoplastic Polyurethane Polymers.
Materials
2012

Femtosecond laser processing as a versatile tool for advanced solid state lighting sources: From efficacy enhancement to colour temperature control

Autor*innen: Kuna, Ladislav; Sommer, Christian; Reil, Frank; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Wenzl, Franz P.
Femtosecond laser processing as a versatile tool for advanced solid state lighting sources: From efficacy enhancement to colour temperature control
Materials
2012

Biomimetic approaches for designing blood-contacting surfaces for artificial vessels - a review

Autor*innen: J.M. Lackner, P. Hartmann, W. Waldhauser, R. Major
Biomimetic approaches for designing blood-contacting surfaces for artificial vessels - a review
Materials
2012

Biomimetic design for cell-contacting surfaces

Autor*innen: J.M. Lackner, J. Kreith, W. Waldhauser, P. Hartmann, C. Teichert, F. Schmied, L. Major, J. Keckes
Biomimetic design for cell-contacting surfaces
Materials
2012

Self-assembling (nano-)wrinkling topography formation in low-temperature vacuum deposition on soft polymer surfaces

Autor*innen: Lackner, J. M.; Waldhauser, W.; Hartmann, P.; Miskovics, O.; Schmied, F.; Teichert, C.; Schöberl, T.
Self-assembling (nano-)wrinkling topography formation in low-temperature vacuum deposition on soft polymer surfaces
Materials
2012

The phosphor’s optical properties–chromaticity coordinate relationship of phosphor converted white LEDs

Autor*innen: Sommer, C.; Hartmann, P.; Pachler, P.; Hoschopf, H.; Wenzl, F. P.
The phosphor’s optical properties–chromaticity coordinate relationship of phosphor converted white LEDs
Materials
2011

The Impact of Light Scattering on the Radiant Flux of Phosphor-Converted High Power White Light-Emitting Diodes

Autor*innen: Sommer, Christian; Reil, Frank; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Hoschopf, Hans; Wenzl, Franz P.
The Impact of Light Scattering on the Radiant Flux of Phosphor-Converted High Power White Light-Emitting Diodes
Materials
2011

Nanoimprinted complementary organic electronics: Single transistors and inverters

Autor*innen: Rothländer, Thomas; Palfinger, Ursula; Stadlober, Barbara; Haase, Anja; Gold, Herbert; Palfinger, Christian; Domann, Gerhard; Kraxner, Johanna; Jakopic, Georg; Hartmann, Paul
Nanoimprinted complementary organic electronics: Single transistors and inverters
Materials
2011

On the Adjustment of the Color Temperature of White Light-Emitting Diodes by Femtosecond Laser Patterning

Autor*innen: Wenzl, Franz P.; Kuna, Ladislav; Sommer, Christian; Reil, Frank; Krenn, Joachim R.; Pachler, Peter; Hartmann, Paul
On the Adjustment of the Color Temperature of White Light-Emitting Diodes by Femtosecond Laser Patterning
Materials
2010

The Impact of Inhomogeneities in the Phosphor Distribution on the Device Performance of Phosphor-Converted High-Power White LED Light Sources

Autor*innen: Sommer, Christian; Reil, Frank; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Tasch, Stefan; Wenzl, Franz P.
The Impact of Inhomogeneities in the Phosphor Distribution on the Device Performance of Phosphor-Converted High-Power White LED Light Sources
Materials
2009

The Effect of the Phosphor Particle Sizes on the Angular Homogeneity of Phosphor-Converted High-Power White LED Light Sources

Autor*innen: Sommer, Christian; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Schweighart, Marko; Tasch, Stefan; Wenzl, Franz P.
The Effect of the Phosphor Particle Sizes on the Angular Homogeneity of Phosphor-Converted High-Power White LED Light Sources
Materials
2009

Surface Texturing of High-Power Flip-Chip LEDs by Femtosecond Laser Direct Structuring

Autor*innen: Kuna, Ladislav; Haase, Anja; Reil, Frank; Sommer, Christian; Krenn, Joachim R.; Hartmann, Paul; Pachler, Peter; Tasch, Stefan; Wenzl, Franz Peter
Surface Texturing of High-Power Flip-Chip LEDs by Femtosecond Laser Direct Structuring
Materials
2008

Tailoring of the Color Conversion Elements in Phosphor-Converted High-Power LEDs by Optical Simulations

Autor*innen: Sommer, Christian; Wenzl, Franz-Peter; Hartmann, Paul; Pachler, Peter; Schweighart, Marko; Tasch, Stefan; Leising, GÜnther
Tailoring of the Color Conversion Elements in Phosphor-Converted High-Power LEDs by Optical Simulations
Materials
2008

Improvement of light extraction from high-power flip-chip light-emitting diodes by femtosecond laser direct structuring of the sapphire backside surface

Autor*innen: Kuna, Ladislav; Haase, A.; Sommer, Christian; Zinterl, Ernst; Krenn, Joachim; Wenzl, Franz; Pachler, Peter; Hartmann, Paul; Tasch, Stefan; Leising, Guenther
Improvement of light extraction from high-power flip-chip light-emitting diodes by femtosecond laser direct structuring of the sapphire backside surface
Materials
2008

Confocal microscopy as a tool for the study of the emission characteristics of high-power LEDs

Autor*innen: Kuna, L.; Sommer, C.; Zinterl, E.; Wenzl, F. P.; Pachler, P.; Hartmann, P.; Tasch, S.; Leising, G.
Confocal microscopy as a tool for the study of the emission characteristics of high-power LEDs
Materials
2008

Volume structuring of high power LED encapsulates by femtosecond laser direct writing

Autor*innen: Kuna, L.; Sommer, C.; Zinterl, E.; Krenn, J. R.; Pachler, P.; Hartmann, P.; Tasch, S.; Leising, G.; Wenzl, F. P.
Volume structuring of high power LED encapsulates by femtosecond laser direct writing
Materials
2007

Silicate phosphors and white LED technology - Improvements and opportunities - art. no. 66690O

Autor*innen: Sommer, Christian; Wenzl, Franz; Hartmann, Paul; Pachler, Peter; Schweighart, Marko; Leising, Guenther; Tasch, Stefan
Silicate phosphors and white LED technology - Improvements and opportunities - art. no. 66690O
Materials
2007

Emission characteristics of high power LEDs studied by confocal microscopy

Autor*innen: Kuna, L.; Sommer, C.; Zinterl, E.; Wenzl, F. P.; Pachler, P.; Hartmann, P.; Tasch, S.; Leising, G.
Emission characteristics of high power LEDs studied by confocal microscopy
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