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Advanced III-V Materials and Processes Enabling Ultrahigh-efficiency ( 50%) Photovoltaics

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Publications

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

Author(s): Marianna Raappana, Ville Polojärvi, Arto Aho, Jaakko Mäkelä, Timo Aho, Antti Tukiainen, Pekka Laukkanen, Mircea Guina
Published in: Corrosion Science, Issue 136, 2018, Page(s) 268-274, ISSN 0010-938X
DOI: 10.1016/j.corsci.2018.03.018

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

Author(s): Timo Aho, Mircea Guina, Farid Elsehrawy, Federica Cappelluti, Marianna Raappana, Antti Tukiainen, A. B. M. Khairul Alam, Ismo Vartiainen, Markku Kuittinen, Tapio Niemi
Published in: Optics Express, Issue 26/6, 2018, Page(s) A331, ISSN 1094-4087
DOI: 10.1364/oe.26.00a331

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

Author(s): Riku Isoaho, Arto Aho, Antti Tukiainen, Timo Aho, Marianna Raappana, Turkka Salminen, Jarno Reuna, Mircea Guina
Published in: Solar Energy Materials and Solar Cells, Issue 195, 2019, Page(s) 198-203, ISSN 0927-0248
DOI: 10.1016/j.solmat.2019.02.030

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

Author(s): J. Puustinen, J. Hilska, M. Guina
Published in: Journal of Crystal Growth, Issue 511, 2019, Page(s) 33-41, ISSN 0022-0248
DOI: 10.1016/j.jcrysgro.2019.01.010

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

Author(s): Jarno Reuna, Ville Polojärvi, Pertti Pääkkönen, Kimmo Lahtonen, Marianna Raappana, Timo Aho, Riku Isoaho, Arto Aho, Mika Valden, Mircea Guina
Published in: Optical Materials, Issue 96, 2019, Page(s) 109326, ISSN 0925-3467
DOI: 10.1016/j.optmat.2019.109326

Chapter 5 - Molecular Beam Epitaxy of Dilute Nitride Optoelectronic Devices

Author(s): Mircea Guina, Shu M. Wang, Arto Aho
Published in: Molecular Beam Epitaxy (Second Edition), 2018, Page(s) 73-94
DOI: 10.1016/B978-0-12-812136-8.00005-0

Power optimization and modelling of connections in solar panel consisting of concentrated photovoltaics multi-junction solar cells

Author(s): Eero Hyötylä
Published in: 2018

Metallin merkitys kontaktiresistanssissa (Conctact Resistance Study: The influense of metal interfaces)

Author(s): Ninja Kajas
Published in: 2018

Nonselective wet etching of III–V semiconductor materials with HIO3:HCl:H2O solutions

Author(s): Tomi Koikkalainen
Published in: 2018

Heat management in high-efficiency photovoltaics

Author(s): Lauri Hytönen
Published in: 2018

Aurinkokennon metallikontaktien valmistus sputteroimalla (Sputtering of metals for solar cell contacts)

Author(s): Teemu Hurmerinta
Published in: 2018

HOPEAKONTAKTIEN VALMISTAMINEN RESISTIIVISESTI HÖYRYSTÄMÄLLÄ III-V PUOLIJOHDEAURINKOKENNOIHIN (Thermal Evaporation of Silver, Bachelor of Science)

Author(s): Elina Anttola
Published in: 2019

Uudentyyppinen metallikontakti III–V-puolijohdeaurinkokennojen hyötysuhteen parantamiseksi (Novel front contact grid design for III–V-semiconductor solar cells − enhancing the conversion efficiency) - Master Thesis

Author(s): Ninja Kajas
Published in: 2019

Structured Metal/Polymer Back Reflectors for III–V Solar Cells

Author(s): Timo Aho, Tapio Niemi, Federica Cappelluti, Antti Tukiainen, Farid Elsehrawy, Mircea Guina
Published in: Light, Energy and the Environment, 2017, Page(s) JW5A.23
DOI: 10.1364/pv.2017.jw5a.23

Passivation of GaInP and AlInP surfaces for III-V solar cells

Author(s): Marianna Raappana, Ville Polojärvi, Timo Aho, Arto Aho, Riku Isoaho, Antti Tukiainen, Mircea Guina
Published in: 2017

Broadband Anti-reflective Coatings for Multi-junction Solar Cells

Author(s): Jarno Reuna, Ville Polojärvi, Timo Aho, Arto Aho, Riku Isoaho, Antti Tukiainen, Mircea Guina
Published in: 2017

Four Junction Dilute Nitride Solar Cells for Next Generation CPV-systems

Author(s): Arto Aho, Riku Isoaho, Timo Aho, Marianna Raappana, Ville Polojärvi, Antti Tukiainen, Mircea Guina
Published in: 2017

GaInNAsSb-based Four Junction Solar Cells on GaAs and Ge Substrates

Author(s): Arto Aho, Riku Isoaho, Marianna Raappana, Ville Polojärvi, Lauri Hytönen, Timo Aho, Antti Tukiainen, Mircea Guina
Published in: 2018

Multijunction solar cells: path to conversion efficiencies exceeding 50%

Author(s): Marianna Raappana, Arto Aho, Ville Polojärvi, Timo Aho, Riku Isoaho, Lauri Hytönen, Antti Tukiainen, Mircea Guina
Published in: 2018

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

Author(s): Timo Aho, Mircea Guina, F. Elsehrawy, F. Cappelluti, Marianna Raappana, Antti Tukiainen, A B M Khairul Alam, I. Vartiainen, M. Kuittinen, and T. Niemi
Published in: 2018

Comparison of ‘shallow’ and ‘deep’ junction architectures for MBE-grown InAs/GaAs quantum dot solar cells

Author(s): Antti Tukiainen, Jari Lyytikäinen, Timo Aho, Eero Halonen, Marianna Raappana, Federica Cappelluti, and Mircea Guina
Published in: 2018

High N-concentration GaInNAsSb materials for III–V solar cells with bandgaps below 0.8 eV

Author(s): Riku Isoaho, Arto Aho, Severi Mäkelä, Lauri Hytönen, Mircea Guina
Published in: 2018

Dilute Nitride Solar Cells - Technology Developments Towards 50% Efficiency




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

Author(s): Riku Isoaho, Arto Aho, Antti Tukiainen, Mircea Guina
Published in: 2017

Design considerations on GaInNAs solar cells with back surface reflectors

Author(s): Antti Tukiainen, Arto Aho, Timo Aho, Ville Polojärvi, Mircea Guina
Published in: 2017

High Efficiency Lattice Matched Four-Junction Solar Cells on GaAs

Author(s): Arto Aho, Riku Isoaho, Marianna Raappana, Timo Aho, Ville Polojärvi, Antti Tukiainen, Mircea Guina
Published in: The 20th European Workshop on Molecular Beam Epitaxy - EuroMBE 2019, Issue Feb 17th to 20th, 2019, 2019

Novel III-V Heterostructures for High Efficiency Solar Cells

Author(s): Ville Polojärvi, Arto Aho, Antti Tukiainen, Marianna Raappana, Timo Aho, Riku Isoaho, Mircea Guina
Published in: Optics and Photonics days 2017 - Oulu, Finland, 2017

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

Author(s): Arto Aho, Arttu Hietalahti, Mircea Guina, Marianna Raappana, Riku Isoaho, Timo Aho, Ville Polojarvi, Antti Tukiainen, Elina Anttola, Severi Makela, Jarno Reuna
Published in: 2019 European Space Power Conference (ESPC), 2019, Page(s) 1-3
DOI: 10.1109/espc.2019.8932092

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

Author(s): Marianna Raappana, Arto Aho, Timo Aho, Riku Isoaho, Elina Anttola, Ninja Kajas, Ville Polojarvi, Antti Tukiainen, Mircea Guina
Published in: 2019 European Space Power Conference (ESPC), 2019, Page(s) 1-3
DOI: 10.1109/espc.2019.8932002

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

Author(s): Timo Aho, Antti Tukiainen, Sanna Ranta, Farid Elsehrawy, Marianna Raappana, Riku Isoaho, Arto Aho, Federica Cappelluti, Mircea Guina
Published in: 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), 2019, Page(s) 2593-2596
DOI: 10.1109/pvsc40753.2019.8981170

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

Author(s): Arto Aho, Mircea Guina, Riku Isoaho, Marianna Raappana, Timo Aho, Ville Polojarvi, Antti Tukiainen, Elina Anttola, Severi Makela, Jarno Reuna
Published in: 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), 2019, Page(s) 0041-0044
DOI: 10.1109/pvsc40753.2019.8980658

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

Author(s): Riku Isoaho, Arto Aho, Antti Tukiainen, Timo Aho, Marianna Raappana, Turkka Salminen, Jarno Reuna, Mircea Guina
Published in: 2019 European Space Power Conference (ESPC), 2019, Page(s) 1-3
DOI: 10.1109/espc47532.2019.9049263

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

Author(s): Timo Aho, Antti Tukiainen, Farid Elsehrawy, Sanna Ranta, Marianna Raappana, Arto Aho, Riku Isoaho, Federica Cappelluti, Mircea Guina
Published in: 2019 European Space Power Conference (ESPC), 2019, Page(s) 1-4
DOI: 10.1109/espc47532.2019.9049262