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DI Dr. Christian Sommer

Funktion

Forschungsgruppenleitung

Forschungsgruppe

MATERIALS:

Licht und Optische Technologien

Telefon

+43 316 876-3201

E-Mail

Christian.Sommer@joanneum.at

Adresse

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

Publikationen

Materials
2023

The impact of plasmonic electrodes on the photocarrier extraction of inverted organic bulk heterojunction solar cells

Autor*innen: Florian Kolb, Mirella El Gemayel, Imran Khan, Jakub Dostalek, Roman Trattnig, Christian Sommer & Emil J. W. List-Kratochvil
The impact of plasmonic electrodes on the photocarrier extraction of inverted organic bulk heterojunction solar cells
Materials
2022

A combined optical-electronic simulation approach for a comprehensive discussion of the performance of visible light positioning under tunable lighting conditions

Autor*innen: Zahiri-Rad, Saman; Lichtenegger, Felix; Leiner, Claude; Weiss, Andreas Peter; Sommer, Christian; Leitgeb, Erich
A combined optical-electronic simulation approach for a comprehensive discussion of the performance of visible light positioning under tunable lighting conditions
Materials
2022

Compact angle diversity receiver concept for visible light positioning

Autor*innen: Lichtenegger, Felix; Leiner, Claude; Sommer, Christian; Weiss, Andreas; Kröpfl, Andreas; Zahiri-Rad, Saman
Compact angle diversity receiver concept for visible light positioning
Materials
2022

Origination of free-form micro-optical elements using one- andtwo-photon grayscale laser lithography

Autor*innen: Lamprecht, Bernhard; Ulm, Andreas; Lichtenegger, Philip; Leiner, Claude; Nemitz, Wolfgang; Sommer, Christian
Origination of free-form micro-optical elements using one- andtwo-photon grayscale laser lithography
Materials
2022

Light guidance film for bifacial photovoltaic modules

Autor*innen: Zauner, Markus; Muehleisen, Wolfgang; Holzmann, Dominik; Baumgart, Marcus; Oreski, Gernot; Feldbacher, Sonja; Feichtner, Markus; Nemitz, Wolfgang; Leiner, Claude; Sommer, Christian; Reil, Frank
Light guidance film for bifacial photovoltaic modules
Materials
2022

Multipitched plasmonic nanoparticle grating for broadband light enhancement in white light-emitting organic diodes

Autor*innen: Auer-Berger, Manuel; Tretnak, Veronika; Sommer, Christian; Wenzl, Franz-Peter; Krenn, Joachim R.; List-Kratochvil, Emil J. W.
Multipitched plasmonic nanoparticle grating for broadband light enhancement in white light-emitting organic diodes
Materials
2022

Human activity recognition based on fusing inertial sensors with an optical receiver

Autor*innen: Salem, Ziad; Lichtenegger, Felix; Weiss, Andreas Peter; Leiner, Claude; Sommer, Christian; Wenzl, Franz-Peter
Human activity recognition based on fusing inertial sensors with an optical receiver
Materials
2022

Combining Optical and Electronic simulation models for the assessment of Visible Light Positioning Systems

Autor*innen: Zahiri-Rad, Saman; Weiss, Andreas P.; Wenzl, Franz P.; Lichtenegger, Felix; Leiner, Claude; Sommer, Christian; Leitgeb, Erich
Combining Optical and Electronic simulation models for the assessment of Visible Light Positioning Systems
Materials
2021

Application Example: Freeform micro-optical elements on light management foils for direct-lit applications

Autor*innen: Leiner, Claude; Trattnig, Roman; Postl, Markus; Palfinger, Ursula; Neudorfsky, Jürgen; Stacher, Christian; Sommer, Christian
Application Example: Freeform micro-optical elements on light management foils for direct-lit applications
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
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

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
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
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

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

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
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

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
2007

Low-Voltage Organic Thin-Film Transistors with High-k Nanocomposite Gate Dielectrics for Flexible Electronics and Optothermal Sensors

Autor*innen: Zirkl, M.; Haase, A.; Fian, A.; Schön, H.; Sommer, C.; Jakopic, G.; Leising, G.; Stadlober, B.; Graz, I.; Gaar, N.; Schwödiauer, R.; Bauer-Gogonea, S.; Bauer, S.
Low-Voltage Organic Thin-Film Transistors with High-k Nanocomposite Gate Dielectrics for Flexible Electronics and Optothermal Sensors
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
Materials

Low-temperature preparation of nanostructured porous sol-gel anti-reflective coating for near-infrared wavelengths

Autor*innen: Nastaran Hayati-Roodbari,, Simon Chwatal, Georg Jakopic, Wolfgang Nemitz, Philip Lichtenegger, Frank Reil, Philipp Melchior, Roman Trattnig, Christian Sommer
Low-temperature preparation of nanostructured porous sol-gel anti-reflective coating for near-infrared wavelengths
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