Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Eviathar Ziffer"'
Autor:
Anton Muhin, Martin Guttmann, Verena Montag, Norman Susilo, Eviathar Ziffer, Luca Sulmoni, Sylvia Hagedorn, Neysha Lobo-Ploch, Jens Rass, Leonardo Cancellara, Shaojun Wu, Tim Wernicke, Michael Kneissl
Publikováno v:
physica status solidi (a). :2200458
Publikováno v:
Journal of Building Engineering. 42:103082
Estimating the total heat flux passing through layers of materials is commonly used to determine the performance and potential of thermal isolation for general building design. The thermal properties of building glazing have been studied theoreticall
Autor:
Michael Kneissl, Tim Wernicke, Martin Guttmann, Luca Sulmoni, Anna Susilo, Norman Susilo, Eviathar Ziffer
Publikováno v:
Journal of Physics D: Applied Physics. 54:335101
The light extraction efficiency (LEE), external quantum efficiency (EQE), and current–voltage characteristics of deep ultraviolet light emitting diodes (DUV-LEDs) with different aluminum mole fractions in the p-AlGaN layers have been investigated.
Autor:
Eviathar Ziffer, E. Mickein, Christian Kuhn, J. R. Aparici, Norman Susilo, Michael Kneissl, Anton Muhin, Martin Guttmann, Luca Sulmoni, Tim Wernicke
Publikováno v:
Applied Physics Letters. 117:252101
Mg-doped AlGaN short-period superlattices with a high aluminum mole fraction are promising to fabricate highly efficient deep UV light emitting diodes. We present a robust and easy-to-implement experimental method for quantification of the vertical c
Autor:
Tim Wernicke, Michael Kneissl, Sylvia Hagedorn, Sebastian Walde, Norman Susilo, Sven Einfeldt, Neysha Lobo Ploch, Hyun Kyong Cho, Markus Weyers, Johannes Glaab, Eviathar Ziffer, Jan Ruschel
Publikováno v:
Applied Physics Letters. 117:241104
The impact of different AlN/sapphire template technologies [i.e., planar, epitaxial lateral overgrown (ELO), and high temperature annealed sputtered ELO] is studied with respect to the operation-induced degradation of 265 nm UVC LEDs. UVC LEDs with i
Autor:
Sylvia Hagedorn, Tim Wernicke, Jens Rass, Michael Kneissl, Eviathar Ziffer, Martin Guttmann, Shaojun Wu, Markus Weyers, Norman Susilo, Martin Albrecht, Leonardo Cancellara, Neysha Lobo Ploch, Sebastian Walde, Luca Sulmoni, Carsten Netzel
Publikováno v:
Photonics Research. 8:589
We report on the performance of AlGaN-based deep ultraviolet light-emitting diodes (UV-LEDs) emitting at 265 nm grown on stripe-patterned high-temperature annealed (HTA) epitaxially laterally overgrown (ELO) aluminium nitride (AlN)/sapphire templates
Autor:
Sebastian Walde, Tim Wernicke, Norman Susilo, Eviathar Ziffer, Markus Weyers, L. Matiwe, T. Straubinger, Pierre-Marie Coulon, Carsten Hartmann, Carol Trager-Cowan, Jonas Weinrich, Philip A. Shields, Anna Mogilatenko, A. Alasmari, Carsten Netzel, Gunnar Kusch, Robert W. Martin, Sylvia Hagedorn, Michael Kneissl, M. Bickermann, G. Naresh-Kumar
Publikováno v:
Walde, S, Hagedorn, S, Coulon, P, Mogilatenko, A, Netzel, C, Weinrich, J, Susilo, N, Ziffer, E, Matiwe, L, Hartmann, C, Kusch, G, Alasmari, A, Naresh-kumar, G, Trager-cowan, C, Wernicke, T, Straubinger, T, Bickermann, M, Martin, R W, Shields, P A, Kneissl, M & Weyers, M 2020, ' AlN overgrowth of nano-pillar-patterned sapphire with different offcut angle by metalorganic vapor phase epitaxy ', Journal of Crystal Growth, vol. 531, 125343 . https://doi.org/10.1016/j.jcrysgro.2019.125343
We present overgrowth of nano-patterned sapphire with different offcut angles by metalorganic vapor phase epitaxy. Hexagonal arrays of nano-pillars were prepared via Displacement Talbot Lithography and dry-etching. 6.6 µm crack-free and fully coales
Autor:
Michael Kneissl, Sebastian Walde, Christiane Becker, Carsten Netzel, Sylvia Hagedorn, Eviathar Ziffer, Nadine Tillner, Norman Susilo, Ralph-Stephan Unger, Hans-Jürgen Lugauer, Phillip Manley, Markus Weyers, Tim Wernicke
Publikováno v:
physica status solidi (a). 217:1900796
BMBF, 03ZZ0134B, Zwanzig20 - Advanced UV for Life - Verbundvorhaben: UV Power; TP2: Entwicklung von high-power UVB-LEDs um 300 nm
Autor:
Sylvia Hagedorn, Ina Ostermay, Eviathar Ziffer, Michael Kneissl, Sven Einfeldt, Markus Weyers, Jens Rass, Hyun Kyong Cho, Norman Susilo, Martin Guttmann, Tim Wernicke
Publikováno v:
IEEE Photonics Technology Letters. :1-1
P-type contacts with a high reflectivity in the ultraviolet spectral region made of molybdenum/aluminum (Mo/Al) on AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) emitting at 265 nm have been investigated. Optimized Mo/Al contacts are s
Autor:
Christian Kuhn, Martin Martens, Michael Kneissl, Sven Einfeldt, Tim Wernicke, Jens Rass, Markus Weyers, V. Kueller, Eviathar Ziffer, Tino Simoneit, Arne Knauer
Publikováno v:
Applied Physics Letters. 108:151108
Current injection into AlGaN-based laser diode structures with high aluminum mole fractions for deep ultraviolet emission is investigated. The electrical characteristics of laser diode structures with different p-AlGaN short period superlattice (SPSL