Publications

Publications 2019

Performance Study of Lattice-Matched Multijunction Solar Cells Incorporating GaInNAsSb Junctions with 0.7 - 1.4 eV Bandgap

Arto Aho, Riku Isoaho, Marianna Raappana, Timo Aho, Ville Polojärvi, Antti Tukiainen, Elina Anttola, Severi Mäkelä, Jarno Reuna, and Mircea Guina

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High Efficiency Lattice-Matched 4J Space Solar Cells on GaAs

Arto Aho, Marianna Raappana, Riku Isoaho, Timo Aho, Ville Polojärvi, Antti Tukiainen, Elina Anttola, Severi Mäkelä, Jarno Reuna, Arttu Hietalahti, Mircea Guina

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Narrow Bandgap Dilute Nitride Materials for 6- junction Space Solar Cells

Riku Isoaho, Arto Aho, Antti Tukiainen, Timo Aho, Marianna Raappana, Turkka Salminen, Jarno Reuna, Mircea Guina

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Back Reflector with Diffractive Gratings for Light- Trapping in Thin-Film III-V Solar Cells

Timo Aho, Antti Tukiainen, Farid Elsehrawy, Sanna Ranta, Marianna Raappana, Arto Aho, Riku Isoaho, Federica Cappelluti, Mircea Guina

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Performance of Solar Cell Grids based on Ag, Au, and Al for Cost-Effective Manufacturing

Marianna Raappana, Arto Aho, Timo Aho, Riku Isoaho, Elina Anttola, Ninja Kajas, Ville Polojärvi, Antti Tukiainen, Mircea Guina

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Enhancement of EQE for MBE grown InAs/GaAs Quantum Dot Solar Cell with Back Reflector

Timo Aho, Antti Tukiainen, Sanna Ranta, Farid Elsehrawy, Marianna Raappana, Riku Isoaho, Arto Aho, Federica Cappelluti, and Mircea Guina

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Influence of ex-situ annealing on the properties of MgF2 thin films deposited by electron beam evaporation

Jarno Reuna, Ville Polojärvi, Pertti Pääkkönen, Kimmo Lahtonen, Marianna Raappana, Timo Aho, Riku Isoaho, Arto Aho, Mika Valden and Mircea Guina, Optical Materials

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Photovoltaic properties of low-bandgap (0.7-0.9 eV) lattice-matched GaInNAsSb solar junctions grown by molecular beam epitaxy on GaAs

Riku Isoaho, Arto Aho, Antti Tukiainen, Timo Aho, Marianna Raappana, Turkka Salminen, Jarno Reuna, and Mircea Guina, Solar Energy Materials and Solar Cells

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Analysis of GaAsBi growth regimes in high resolution with respect to As/Ga ratio using stationary MBE growth

J. Puustinen, J. Hilska, M. Guina, Journal of Crystal Growth

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Publications 2018

Lattice‐matched four‐junction tandem solar cell including two dilute nitride bottom junctions

Arto Aho Riku Isoaho Lauri Hytönen Timo Aho Marianna Raappana Ville Polojärvi Antti Tukiainen Jarno Reuna Severi Mäkelä Mircea Guina, Progress in Photovoltaics

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Dilute nitride triple junction solar cells for space applications: Progress towards highest AM0 efficiency

Arto Aho Riku Isoaho Antti Tukiainen Gabriele Gori Roberta Campesato Mircea Guina, Progress in Photovoltaics

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Metal/Polymer Back Reflectors with Diffraction Gratings for Light Trapping in III-V Solar Cells

Aho, T, Guina, M, Elsehrawy, F, Cappelluti, F, Raappana, M, Tukiainen, A, Khairul Alam, ABM, Vartiainen, I, Kuittinen, M & Niemi, IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC): A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC

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Comparison of metal/polymer back reflectors with half-sphere, blazed, and pyramid gratings for light trapping in III-V solar cells

Aho, T, Guina, M, Elsehrawy, F, Cappelluti, F, Raappana, M, Tukiainen, A, Khairul Alam, ABM, Vartiainen, I, Kuittinen, M & Niemi, T, Optics Express

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Wet etching of dilute nitride GaInNAs, GaInNAsSb, and GaNAsSb alloys lattice-matched to GaAs

Marianna Raappana, Ville Polojärvi, Arto Aho, Jaakko Mäkelä, Timo Aho, Antti Tukiainen, Pekka Laukkanen, MirceaGuina, Corrosion Science

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Chapter 5 - Molecular Beam Epitaxy of Dilute Nitride Optoelectronic Devices

Mircea Guina, Shu M. Wang, Arto Aho, Molecular Beam Epitaxy From Research to Mass Production Book • 2nd Edition • 2018

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Publications 2017

Design considerations on GaInNAs solar cells with back surface reflectors

Antti Tukiainen, Arto Aho, Timo Aho, Ville Polojärvi, Mircea Guina, 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC)

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Temperature dependent characteristics of GaInP/GaAs/GaInNAsSb solar cell under simulated AM0 spectra

Riku Isoaho, Arto Aho, Antti Tukiainen, Mircea Guina, 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC)

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Performace of Dilute Nitride Triple Junction Space Solar Cell Grown by MBE

Arto Aho, Riku Isoaho, Antti Tukiainen, Ville Polojärvi, Marianna Raappana, Timo Aho, Mircea Guina, E3S Web of Conferences

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Publications 2016

Enhancement of Photocurrent in GaInNAs Solar Cells using Ag/Cu Double-Layer Back Reflector' Applied Physics Letters

Aho, T, Aho, A, Tukiainen, A, Polojärvi, V, Salminen, T, Raappana, M & Guina, Applied Physics Letters

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