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Improved light extraction and thermal management in thin-film GaAs LEDs using hemispherical ZnSe lenses
Ivan Radevici, Mouad Bikerouin, Benoît Behaghel, Seyed Ahmad Shahahmadi, Sergey Novikov, Luc M. Van der Krabben, Natasha Gruginskie, John J. Schermer, Jani Oksanen
2026
Applied Physics Letters
Voltage and efficiency characteristics of shifted-junction GaAs/GaInP thin-film solar cells and light emitters
Seyed Ahmad Shahahmadi, Rosalinda H. Van Leest, Pyry Kivisaari, Günther M.M.W. Bissels, Ivan Radevici, Jani Oksanen
2026
Applied Physics Letters
Generalization of the two-diode IV model for background-doped thermophotonic LEDs
Jasper van Gastel, Pyry Kivisaari, Seyed Ahmad Shahahmadi, Benoît Behaghel, Natasha Gruginskie, Luc van der Krabben, Jani Oksanen, Elias Vlieg, John J. Schermer
2026
Solar Energy Materials and Solar Cells
Low-loss resonant nonlinear nanophotonics in the visible spectral range using wafer-bonded crystalline AlInP
R. Kolkowski, S. A. Shahahmadi, S. Novikov, J. Oksanen, A. C. Liapis, H. Bai, T. Stolt, M. Kaivola, A. Shevchenko
2025
Nonlinear nanophotonics with Mie-resonant nanostructures based on wafer-bonded crystalline AlInP - a low-loss χ(2) material
R. Kolkowski, S. A. Shahahmadi, S. Novikov, J. Oksanen, A. C. Liapis, H. Bai, T. Stolt, M. Kaivola, A. Shevchenko
2025
19th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2025
Resonant nanostructures based on AlInP-a low-loss material platform for nonlinear nanophotonics
Radoslaw Kolkowski, Seyed Ahmad Shahahmadi, Serguei Novikov, Jani Oksanen, Andreas C. Liapis, Huayu Bai, Timo Stolt, Matti Kaivola, Andriy Shevchenko
2025
ELO-compatible back reflectors for light management in thin-film GaAs-based LEDs
Luc M. van der Krabben, Rosalinda H. van Leest, Seyed Ahmad Shahahmadi, Günther M.M.W. Bissels, Jani Oksanen, Elias Vlieg, John J. Schermer
2025
Solar Energy Materials and Solar Cells
Temperature Dependence of Reaction Kinetics in a Hybrid GaAs Solar-Fuel Cell Device
Mahdi Alizadeh, Shengyang Li, Seyed Ahmad Shahahmadi, Jani Oksanen
2024
Journal of Physical Chemistry Letters
Elucidating the effects of Cr–S variations in Cr-doped CZTS for intermediate band solar cell applications
Megat Mohd Izhar Sapeli, Puvaneswaran Chelvanathan, Yulisa Yusoff, Kazi Sajedur Rahman, Md Khan Sobayel Rafiq, Seyed Ahmad Shahahmadi, Nowshad Amin
2024
Optical Materials
Pushing the limits of non-radiative recombination suppression in GaAs/GaInP light emitting diodes by doping profile engineering
Ahmad Shahahmadi, Pyry Kivisaari, Benoît Behaghel, Ivan Radevici, Sami Suihkonen, Jani Oksanen
2024
Applied Physics Letters