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Thin film light-trapping enhanced quantum dot photovoltaic cells: an enabling technology for high power-to-weight ratio space solar arrays.

Total Cost €


EC-Contrib. €






Project "TFQD" data sheet

The following table provides information about the project.


Organization address
city: TORINO
postcode: 10129

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Project website
 Total cost 1˙008˙376 €
 EC max contribution 1˙008˙376 € (100%)
 Programme 1. H2020-EU.2.1.6. (INDUSTRIAL LEADERSHIP - Leadership in enabling and industrial technologies – Space)
 Code Call H2020-COMPET-2015
 Funding Scheme RIA
 Starting year 2016
 Duration (year-month-day) from 2016-01-01   to  2018-12-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    POLITECNICO DI TORINO IT (TORINO) coordinator 196˙472.00
4    UNIVERSITY COLLEGE LONDON UK (LONDON) participant 145˙000.00
5    TF2 DEVICES B.V. NL (NIJMEGEN) participant 100˙000.00
6    THALES ALENIA SPACE ITALIA SPA IT (ROMA) participant 65˙850.00
7    TTY-SAATIO FI (TAMPERE) participant 0.00


 Project objective

The project “Thin film light-trapping enhanced quantum dot photovoltaic cells: an enabling technology for high power-to-weight ratio space solar arrays” (TFQD) aims at developing a new generation of high-efficiency thin-film photovoltaic devices for future solar arrays, by exploiting cross-cutting Key Enabling Technologies as: advanced manufacturing, advanced materials, photonics. The core device is a thin-film III-V solar cell embedding quantum dots and photonic nanogratings to boost the efficiency beyond the thermodynamic limit of conventional single-junction devices. Combining the thin-film approach with the nanostructuring of semiconductor layers allows for a drastic improvement of power-to-weight ratio and mechanical flexibility with respect to currently available space solar cells. The incorporation of quantum dots provides improved radiation and temperature hardness. The TFQD device targets efficiency higher than 30% (AM0), at least an eightfold increase of power-to-weight ratio vs. triple junction III-V solar cells and very low bending radius, allowing for the development of rollable or inflatable solar arrays. Demonstration up to TRL4 will be carried out through on ground testing under representative in orbit conditions over a set of 44 prototypes. The consortium includes four academic partners having a strong position in modelling, epi-layer structuring and development and manufacturing of thin-film III-V solar cells, a SME able to quickly implement the new technology in their thin-film solar cell production line, and a company that is a European leader in satellite systems as early adopter of the developed devices to boost innovation in space solar panels. On account of wafer reuse and simplicity of the epitaxial structures, the TFQD solar cells are less expensive than the current state-of-the-art multi-junction solar cells, thus also important impact potential on terrestrial applications, as first in concentrating photovoltaic systems, is foreseen.


List of deliverables.
Project website Websites, patent fillings, videos etc. 2019-07-26 10:26:06
Initial dissemination and exploitation plan. Documents, reports 2019-07-26 10:26:06
Optimized nanostructured ARC with reflectivity less than 5% over the whole GaAs and QD spectrum Demonstrators, pilots, prototypes 2019-07-26 10:26:06
Solar cells Requirements Specification and Test Flow Specification Documents, reports 2019-07-26 10:26:06
First ELO processed regular and QD cells from UCL epilayers Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Optimized photon-recycling enhanced thin-film solar cell benchmark Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Wafer-based QD solar cell targeting open circuit voltage higher than 0.95 V and efficiency higher than 18% without AR coating Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Summary of the entire action, describing the overview of the results and their exploitation and dissemination, the conclusions on the action and its socio-economic impact Documents, reports 2019-07-26 10:26:05
Refined Test requirement specifications Documents, reports 2019-07-26 10:26:05
Batch of 44 1cm^2 TFQD solar cells available for space qualification test Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Wafer-based QD solar cell targeting 100 QD layers with density of 1e11 cm^-2 Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Interim plan for dissemination and exploitation: check of measures and update Documents, reports 2019-07-26 10:26:05
First photon-recycling enhanced thin-film solar cells from UCL layers Demonstrators, pilots, prototypes 2019-07-26 10:26:05
Fully-processed wafer-based QD solar cell benchmark from structures delivered by UCL Demonstrators, pilots, prototypes 2019-07-26 10:26:05

Take a look to the deliverables list in detail:  detailed list of TFQD deliverables.


year authors and title journal last update
List of publications.
2016 Timo Aho, Arto Aho, Antti Tukiainen, Ville Polojärvi, Turkka Salminen, Marianna Raappana, Mircea Guina
Enhancement of photocurrent in GaInNAs solar cells using Ag/Cu double-layer back reflector
published pages: 251104, ISSN: 0003-6951, DOI: 10.1063/1.4972850
Applied Physics Letters 109/25 2019-07-26
2018 N. Gruginskie, S.C.W. van Laar, G. Bauhuis, P. Mulder, M. van Eerden, E. Vlieg, J.J. Schermer
Increased performance of thin-film GaAs solar cells by rear contact/mirror patterning
published pages: 10-18, ISSN: 0040-6090, DOI: 10.1016/j.tsf.2018.05.042
Thin Solid Films 660 2019-07-26
2018 F. Cappelluti, D. Kim, M. van Eerden, A.P. Cédola, T. Aho, G. Bissels, F. Elsehrawy, J. Wu, H. Liu, P. Mulder, G. Bauhuis, J. Schermer, T. Niemi, M. Guina
Light-trapping enhanced thin-film III-V quantum dot solar cells fabricated by epitaxial lift-off
published pages: 83-92, ISSN: 0927-0248, DOI: 10.1016/j.solmat.2017.12.014
Solar Energy Materials and Solar Cells 181 2019-07-26
2017 Rosalinda H. van Leest, Peter Mulder, Natasha Gruginskie, Simone C. W. van Laar, Gerard J. Bauhuis, Hyenseok Cheun, Heonmin Lee, Wonki Yoon, Remco van der Heijden, Ed Bongers, Elias Vlieg, John J. Schermer
Temperature-Induced Degradation of Thin-Film III–V Solar Cells for Space Applications
published pages: 702-708, ISSN: 2156-3381, DOI: 10.1109/jphotov.2016.2642642
IEEE Journal of Photovoltaics 7/2 2019-07-26
2018 A. P. Cédola, D. Kim, A. Tibaldi, M. Tang, A. Khalili, J. Wu, H. Liu, F. Cappelluti
Physics-Based Modeling and Experimental Study of Si-Doped InAs/GaAs Quantum Dot Solar Cells
published pages: 1-10, ISSN: 1110-662X, DOI: 10.1155/2018/7215843
International Journal of Photoenergy 2018 2019-07-26
2018 Natasha Gruginskie, Gerard Bauhuis, Peter Mulder, Elias Vlieg, John Schermer
published pages: , ISSN: , DOI:
VII Congresso Brasileiro de Energia Solar-CBENS 2018. 2018. yearly 2019-07-26
2018 Timo Aho, Mircea Guina, Farid Elsehrawy, Federica Cappelluti, Marianna Raappana, Antti Tukiainen, A. B. M. Khairul Alam, Ismo Vartiainen, Markku Kuittinen, Tapio Niemi
Comparison of metal/polymer back reflectors with half-sphere, blazed, and pyramid gratings for light trapping in III-V solar cells
published pages: A331, ISSN: 1094-4087, DOI: 10.1364/oe.26.00a331
Optics Express 26/6 2019-07-26
2018 Farid Elsehrawy, Tapio Niemi, Federica Cappelluti
Guided-mode resonance gratings for enhanced mid-infrared absorption in quantum dot intermediate-band solar cells
published pages: A352, ISSN: 1094-4087, DOI: 10.1364/OE.26.00A352
Optics Express 26/6 2019-07-26
2017 F. Cappelluti, G. Ghione, M. Gioannini, G. Bauhuis, P. Mulder, J. Schermer, M. Cimino, G. Gervasio, G. Bissels, E. Katsia, T. Aho, T. Niemi, M. Guina, D. Kim, J. Wu, H. Liu
Novel Concepts for High-Efficiency Lightweight Space Solar Cells
published pages: 3007, ISSN: 2267-1242, DOI: 10.1051/e3sconf/20171603007
E3S Web of Conferences 16 2019-07-26

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