Engineered Nanosystems
The group develops semiconductor devices for efficient energy conversion, including:
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Heat into light (electroluminescent cooling) + Heat into electrical power (thermophotonic power generation)
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Chemical energy into electrical power (chemovoltaic energy conversion)
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Electrical power into light (diffusion-driven devices)
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Metalorganic vapour-phase epitaxy (MOVPE) of III-V materials
The research is supported by a broad range of scientific and technological activities, including mathematical modelling, semiconductor material growth and processing, as well as the development and automation of experimental techniques.
Contact
The research group is led by Dr. Jani Oksanen.
Group members
Selected Publications
Thermophotonic cooling with light-emitting diodes
Toufik Sadi, Ivan Radevici, Jani Oksanen
2020
Nature Photonics
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
Pt-catalyzed chemovoltaic current generation from renewable alcohol fuels using GaAs/GaInP double heterojunctions
Mahdi Alizadeh, Shengyang Li, Jani Oksanen
2026
Electrochimica Acta
Voltage and efficiency characteristics of shifted-junction GaAs/GaInP thin-film solar cells and light emitters
Ahmad Shahahmadi, Rosalinda H. Van Leest, Pyry Kivisaari, Günther M.M.W. Bissels, Ivan Radevici, Jani Oksanen
2026
Applied Physics Letters
Back-Contacted GaInP/GaAs LED Structures by Ex-Situ Dopant Redistribution
Antti Myllynen, Seyed Ahmad Shahahmadi, Ivan Radevici, Jani Oksanen
2020
IEEE Transactions on Electron Devices
Electro-Optical Coupling in Double Diode Structures
Nicklas Anttu, Vilgailė Dagytė, Benoît Behaghel, Ivan Radevici, Toufik Sadi, Pyry Kivisaari, Jani Oksanen
2023
Physical Review Applied