Organic solar cells

 At the OPV research group at SDU NanoSYD, we are doing research and development within new types of organic solar cells. The work encompass new ways to improve device efficiency, device stability and device up-scaling. This includes research and development activities on:

  • Stabilization of organic solar cells through additive mixing
  • Development of novel interface layers from metal-oxide thin-films
  • Plasmonics and up-conversion for improved light-absorption
  • Device integration and up-scaling through Roll-to-Roll (R2R) processing                                              

 Solar cells at the OPV group, SDU NanoSYD (top left) are fabricated and characterized using various different methods and techniques. The equipment portfolio encompasses amongst others a glovebox-connected cluster deposition system, including both organic and thermal evaporation plus reactive sputtering (top middle). The electrical characterization equipment includes besides standard J-V and Quantum Efficiency (QE) measurements also a dedicated lifetime measurement setup (top right).

 The facilities include also a complete R2R processing lab that uses both R2R sputter deposition, R2R slot-die coating and R2R lamination for developing large-scale, flexible solar cell devices. One main aim of the SDU NanoSYD OPV group is to bridge research in laboratory scale solar cell technology to development of up-scaled R2R modules, using technology transfer from a complete set of complementary and interconnected processing techniques  (lab2fab).

People in the OPV group

Morten Madsen, Associate Professor          
Vida Engmann, Assistant Professor
Elodie Destouesse, Postdoc
Mina Mirsafaei, PhD student
Mehrad Ahmadpour, PhD student
Bhushan Ramesh Patil, PhD student
Golnaz Sherafatipour, PhD student
Pawel Cielecki, PhD student
Jani Lamminaho, R2R engineer
Arkadiusz Jaroslaw Goszczak, Executive Officer
Michela Prete, Master student
Christoph David Leonhardt, Master student

Funded projects

Mechanical and photochemical stabilization of
flexible organic solar cells
(Compliant-PV), Villum Foundation
Project duration: 1 January 2017 - 31 December 2019
University partners: Aarhus University, Department of Chemistry, Technical University of Denmark, DTU Chemical Engineering

RollFlex – An innovation project center for Roll-to-Roll processed flexible devices, Interreg 5A
Project duration: 1 April 2016 - 31 March 2019
Click on the image to read the project brochure online.
University partners: Christian-Albrechts-Universität zu Kiel, SDU/MCI/Innovation and Design Engineering
Industry partner: Stensborg A/S, FUMT R&D, LEAP Technology, Polyteknik A/S, Rako Etiketten, Max Steier GmbH
Other: Fraunhofer FEP, Furgy, Clean, Sønderborg Vækstråd, NINa, Udviklingsråd Sønderjylland, WTSH

High-efficiency solar cells by spectral transformation using nano-optical enhancement (SunTune), InnovationsFonden
Project duration: 1 May 2015 - 30 April 2019
University partners: Institut for Fysik og Astronomi/iNANO, Aarhus Universitet, Institut for Ingeniørvidenskab, Aarhus Universitet, DTU Mekanik, Danmarks Tekniske Universitet, International Solar Energy Research Center, Konstanz
Industry partner: Racell – Saphire Group, EnergiMidt A/S

Stabilization of Organic Solar Cells by Ternary Blending Active Layers with Stabilizing Additives (Stabil-O), The Danish Research Council for Technology and Production Sciences (DFF FTP)
Project duration: 1 June 2015 - 31 May 2017 (Vida Engmann)
University partners: National Institute of Standards and Technology, Eberhard Karls Universität Tübingen 

Thin-film Hybrid Interfaces: a training initiative for the design of next-generation energy devices (THINFACE), Initial Training Network (ITN FP7)
Project duration: 1 September 2013 – 31 August 2017
University partners: Uni Milano-Bicocca, Technical University of Graz, Uni Pierre & Marie Curie, Uni Autonoma De Madrid, CIC NanoGUNE
Industry partner: NOVALED, Danfoss

Production of next-generation energy devices, SDU2020
Project duration: 1 January 2014 – 30 June 2017
University partners: Department of Physics, Chemistry and Pharmacy, SDU, and Department of Biochemistry and Molecular Biology (Membrane Biophysics and biophotonics group), SDU

High efficiency solar cells for PV devices, Fabrikant Mads Clausen Foundation
Project duration: 1 September 2013 – 31 August 2014

Cross-border electro-mobility – development and deployment of new technologies enabling sustainable electric mobility’ (eMOTION), INTERREG 4A
Project duration: 1 October 2011 – 30 September 2014
Leadpartner: UdviklingsRåd Sønderjylland
University partners: SDU – Institute of Technology and Innovation, Flensburg University of Applied Sciences, University of Applied Sciences Kiel, Christian-Albrechts-Universität zu Kiel


25. Numerical Analysis on Effects of Experimental Ga Grading on Cu(In,Ga)Se2 Solar Cell Performance, Y. Liu, B. Li, S. Lin, W. Liu, J. Adam, M. Madsen, H.-G. Rubahn and Y. Sun, Under review  (2017)

24. Modeling Multi-junction Solar Cells by Non-Local Tunneling and Sub-Cell Analysis, Y. Liu, M. Ahmadpour, J. Adam, J. Kjelstrup-Hansen, H.-G. Rubahn and M. Madsen, Under review (2017)

23. Inhibiting Photooxidative Degradation in Organic Solar Cells using Stabilizing Additives, V. Turkovic and M. Madsen, Book chapter in 'Devices from Hybrid and Organic Materials', Ed. V. Turkovic, M. Madsen, H.-G. Rubahn, part of the 'World Scientific Reference of Hybrid Materials' book series, In Press (2017)

22. Cu(II) and Zn(II) based Phthalocyanine as Hole selective layers for Perovskite Solar Cells, L. Calio, J. Follana-Berná, S. Kazim, M. Madsen, H.-G. Rubahn, Á. Sastre-Santos and S. Ahmad, Sustainable Energy Fuels, 2017, DOI: 10.1039/C7SE00367F (2017)

21. Work Function Mapping of MoOx Thin-Films for Application in Electronic Devices, A. L. F. Cauduro, R. dos Reis, G. Chen, A. K. Schmid, H.-G. Rubahn and M. Madsen,  Ultramicroscopy, DOI: 10.1016/j.ultramic.2017.03.025 (2017)

20. ITO with embedded silver grids as transparent conductive electrodes for large area organic solar cells, B. R. Patil, M. Mirsafaei, P. P. Cielecki, A. L. F. Cauduro, J. Fiutowski, H.-G. Rubahn and M. Madsen, Nanotechnology, 28, 405303 ( 2017)

19. 4P-NPD ultra thin-films as efficient exciton blocking layers in inverted DBP/C70 based organic solar cells, B. R. Patil, Y. Liu, T. Qamar, H.-G. Rubahn and M. Madsen, J. Phys. D: Appl. Phys., 50, 385101 (2017)

18. Current Matching in Multifold DBP/C70 Organic Solar Cells with Open Circuit Voltages of up to 6.44 V, M. Ahmadpour, Y. Liu, H.-G. Rubahn and M. Madsen, IEEE J. Photovolt., 7, 1319 (2017)

17. Electrical properties of organic solar cells with nano-structured bottom electrodes, M. Mirsafaei, A. H. Fallahpour, P. Lugli, H.-G. Rubahn, J. Adam and M. Madsen, Sci. Rep., 7, 5300 (2017)

16. Crystalline Molybdenum Oxide Thin-Films for Application as Interfacial Layers in Optoelectronic Devices, A. L. F. Cauduro, R. dos Reis, G. Chen, A. K. Schmid, C. Méthivier, H.-G. Rubahn, L. Bossard-Giannesini, H. Cruguel, N. Witkowski and M. Madsen, ACS Appl. Mater. Interfaces, 9, 7717 (2017)

15. Enhanced absorption in organic thin-films from imprinted concave nanostructures, A. J. Goszczak, H.-G. Rubahn and M. Madsen, Mater. Sci,  23, 6 (2017)

14. Periodically arranged colloidal gold nanoparticles for enhanced light harvesting in organic solar cells, M. Mirsafaei, A. L. F. Cauduro, C. Kunstmann-Olsen, A. M. Davidson, S. Hassing, M. A. B. Hedegaard, H.-G. Rubahn, J. Adam and M. Madsen, SPIE Proc. 9898, 989810 (2016)

13. Long-Term Stabilization of Organic Solar Cells using UV Absorbers, V. Turkovic, S. Engmann, N. Tsierkezos, H.
Hoppe, M. Madsen, H.-G. Rubahn, U. Ritter and G. Gobsch, J. Phys. D: Appl. Phys, 49, 125604 (2016)

12. Long-Term Stabilization of Organic Solar Cells using Hydoperoxide Decomposers as Additives, V. Turkovic, S. Engmann, N. Tsierkezos, H.
Hoppe, M. Madsen, H.-G. Rubahn, U. Ritter and G. Gobsch, Appl. Phys. A, 122, 255 (2016)

11. Nanoscale Aluminum concaves for light-trapping in organic thin-films, A. J. Goszczak, J. Adam, P. P. Cielecki, J. Fiutowski, H.-G. Rubahn and M. Madsen, Opt. Commun., 370, 135 (2016)

10. The Role of Charge Transfer State on the Reduced Langevin Recombination in Organic Solar Cells: A Theoretical Study,
Y. Liu, K. Zojer, B. Lassen, J. Kjelstrup-Hansen, H.-G. Rubahn and M. Madsen, J. Phys. Chem. C, 119, (2015) 26588

9. Nanoscale concave structures for field enhancement in organic thin films, A. J. Goszczak, J. Adam, P. P. Cielecki, J. Fiutowski, H.-G. Rubahn and M. Madsen. SPIE Proc, 9547 (2015) 954731

8. Organiske solceller: En lys fremtid med solenergi, V. Engmann and M. Madsen. Dansk Kemi, 96 (2015) 24-26

7. Tuning the optoelectronic properties of amorphous MoOx films by reactive sputtering, A. L. F. Cauduro, Z. E. Fabrim, M. Ahmadpour, P. F. Fichtner, S. Hassing, H.-G. Rubahn and M. Madsen. Appl. Phys. Lett, 106 (2015) 202101 

6. Crystallites of α-Sexithiophene in Bilayer Small Molecule Organic Solar Cells Double Efficiency, M. Radziwon, A. L. F. Cauduro, M. Madsen and H.-G. Rubahn. Journal of Nanomaterials, 482372 (2014)

5. Growth of alpha-sexithiophene nanostructures on C60 thin film layers, M. Radziwon, M. Madsen, F. Balzer, R. Resel and H.-G. Rubahn. Thin Solid Films, 558 (2014) 165

4. Flexible PCPDTBT:PCBM solar cells with integrated grating structures, R.M. de Oliveira Hansen, Y. Liu, M. Madsen, and H.-G. Rubahn. Proc. SPIE, 8830 (2013) 883021

3. Flexible organic solar cells including efficiency enhancing grating structures
. R.M. de Oliveira Hansen, Y. Liu, M. Madsen, and H.-G. Rubahn.  Nanotechnology, 24 (2013) 145301

2. Organisk Energiteknologi på vej frem, M. Madsen and J. Kjelstrup-Hansen. Aktuel Naturvidenskab, 5 (2013) 14-16

1. Efficiency enhancement of ITO-free organic polymeric solar cells by light trapping. R. M. de Oliveira Hansen, M. Schiek, Y. Liu, M. Madsen, and H.-G. Rubahn. Proc. SPIE, 8438 (2012) 843813

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