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Mayté Caldès (CR-HDR), Nicolas Barreau (MC-HDR), Catherine Guillot-Deudon (IR), Philippe Deniard (DR), Sylvie Harel (MC), Stéphane Jobic (DR), Alain Lafond (PR), Camille Latouche (MC), Michaël Paris (IR), Angélica Thoméré (PhD student)

Thin film technology offers significant potential for low-cost high-efficiency photovoltaic (PV) devices. Chalcogenide based material are good candidates as absorbers in solar cells. We are involved in the crystal chemistry investigation of these compounds such as Cu(In,Ga)Se2 and Cu2ZnSnS4 as well as in the design of new photovoltaic chalcogenides. The main goal is to evidence the structure-properties relationship.


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  • Mayté Caldès (CR-HDR), Nicolas Barreau (MC-HDR), Catherine Guillot-Deudon (IR), Philippe Deniard (DR), Sylvie Harel (MC), Stéphane Jobic (DR), Alain Lafond (PR), Camille Latouche (MC), Michaël Paris (IR).
  • Angélica Thoméré (PhD student) "Research of new high-gap chalcogenide absorbers (~ 1.7eV) for thin-film solar cells".


Bourdais, S.; Choné, C.; Delatouche, B.; Jacob, A.; Larramona, G.; Moisan, C.; Lafond, A.; Donatini, F.; Rey, G.; Siebentritt, S.; et al. Is the Cu/Zn Disorder the Main Culprit for the Voltage Deficit in Kesterite Solar Cells? Adv. Energy Mater. 2016, 6, 1502276.

Paris, M.; Larramona, G.; Bais, P.; Bourdais, S.; Lafond, A.; Choné, C.; Guillot-Deudon, C.; Delatouche, B.; Moisan, C.; Dennler, G. 119Sn MAS NMR to Assess the Cationic Disorder and the Anionic Distribution in Sulfoselenide Cu2ZnSn(SxSe1–x)4 Compounds Prepared from Colloidal and Ceramic Routes.
J. Phys. Chem. C 2015, 119, 26849–26857.

Choubrac, L.; Lafond, A.; Paris, M.; Guillot-Deudon, C.; Jobic, S. The Stability Domain of the Selenide Kesterite Photovoltaic Materials and NMR Investigation of the Cu/Zn Disorder in Cu2ZnSnSe4 (CZTSe).
Phys. Chem. Chem. Phys. 2015, 17, 15088–15092.

Scragg, J. J. S.; Choubrac, L.; Lafond, A.; Ericson, T.; Platzer-Björkman, C. A Low-Temperature Order-Disorder Transition in Cu2ZnSnS4 Thin Films. Applied Physics Letters 2014, 104, 41911.

Paris, M.; Choubrac, L.; Lafond, A.; Guillot-Deudon, C.; Jobic, S. Solid-State NMR and Raman Spectroscopy To Address the Local Structure of Defects and the Tricky Issue of the Cu/Zn Disorder in Cu-Poor, Zn-Rich CZTS Materials.
Inorg. Chem. 2014, 53, 8646–8653.

Lafond, A.; Choubrac, L.; Guillot-Deudon, C.; Fertey, P.; Evain, M.; Jobic, S. X-Ray Resonant Single-Crystal Diffraction Technique, a Powerful Tool to Investigate the Kesterite Structure of the Photovoltaic Cu 2 ZnSnS 4 Compound.
Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 2014, 70, 390–394.

Multinuclear (67Zn, 119Sn and 65Cu) - NMR spectroscopy – an ideal technique to probe the cationic ordering in Cu2ZnSnS4 photovoltaic materials
Choubrac, L.; Paris, M.; Lafond, A.; Guillot-Deudon, C.; Rocquefelte, X.; Jobic, S.
Phys. Chem. Chem. Phys. 2013, 15, 10722.

Structure Flexibility of the Cu2ZnSnS4 Absorber in Low-Cost Photovoltaic Cells: From the Stoichiometric to the Copper-Poor Compounds
L. Choubrac, A. Lafond, C. Guillot-Deudon, Y. Moëlo and S. Jobic
Inorg. Chem., 2012, 51, 3346−3348.

Crystal Chemistry and Electronic Structure of the Photovoltaic Buffer Layer, (In1-xAlx)2S3
A. Lafond, X. Rocquefelte, M. Paris, C. Guillot-Deudon, and V. Jouenne
Chem. Mater. 2011, 23 5168–5176.

Structural investigation of the Cu2Se–In2Se3–Ga2Se3 phase diagram, X-ray photoemission and optical properties of the Cu1−z(In0.5Ga0.5)1+z/3Se2 compounds
M. Souilah, A. Lafond, C. Guillot-Deudon, S. Harel and M. Evain
J. Solid State Chem., 2010, 183, 2274-2280.

Syntheses and X-ray diffraction, photochemical and optical characterization of Cu2SixSn1-xS3 (0.4<x<0.6) for photovoltaic applications
A. Lafond, J.A. Cody, M. Souilah, C. Guillot-Deudon, R. Kiebach and W. Bensch Inorg. Chem. 46, 1502-1506 (2007).


IRDEP / EDF R&D Technologies du solaire - 6 quai Watier
78400 Chatou - FRANCE

Ångström Solar Center - Uppsala University
751 21 Uppsala - SWEDEN

Research programs

  • French National Research Agency (ANR) NovACEZ 2011-2014
  • French "Ile-de-France" Institut for Photovoltaïcs (IPVF) projet C 2012-2019
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