1. Czech French Barrande Workshop
Nanostructures for Photovoltaic Energy Conversion – Czech - French research cooperation
Antonín Fejfar
Institute of Physics, Czech Academy of Sciences
Prague, Czech Republic

2. Czech Academy of Sciences
head-quarters in Prague
established in 19th century (1891, by Austrian Emperor F.J.)
54 public research institutions mathematics, physics, earth science life and chemical sciences humanities and social sciences
about 7000 employees
total budget ~ 400 M€/year (2016)
institutional budget ~ 180 M€
the rest from R&D projects
A. Fejfar - Czech French Barrande workshop

3. IoP CAS: 5 divisions, 2 campuses
Na Slovance
Cukrovarnicka
Division 1:
Elementary
Particle
Physics
Division 3: Solid State Physics
Division 2: Condensed Matter Physics
Division 4: Optics
IoP staff: 772 (researchers: 500)
+ PhD students: 100
Division 5: High Power Systems
Administration
A. Fejfar - Czech French Barrande workshop

4. IoP making the history of PV since 60’s
Jan Tauc
(father of amorphous semiconductors)
Stan Veprek
(father of amorphous silicon hydrogenation)
Jan Kocka
(father of constant photocurrent method)
Tauc gap
Microcrystalline silicon
CPM
A. Fejfar - Czech French Barrande workshop

5. Silicon thin films – origins in 60s:
A. Fejfar - Czech French Barrande workshop

6. A. Fejfar - Czech French Barrande workshop
50 year later:
Applied Komatsu
A. Fejfar - Czech French Barrande workshop

7. Annual production of Si thin films
Solar cells:
LCD:
A. Fejfar - Czech French Barrande workshop

8. FP7: Improved Polycrystalline-Silicon Modules on Glass Substrates (PolySiMode) ENERGY : Efficiency and material issues for thin-film photovoltaics
IMEC: Interuniversitair Micro-Electronica Centrum VZW
CSG Solar AG
Fraunhofer ISE: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Fyzikalni ustav Akademie ved Ceske republiky,v.v.i. (FZU)
Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)
Institut d'Electronique du Solide et des Systèmes (InESS), Strasbourg, France

9. Competitive Low-Carbon Energy (H2020-LCE-07-2016) Project No.: 727523
Next-generation interdigitated back-contacted silicon heterojunction solar cells and modules by design and process innovations
NextBase
performance c-Si solar cells and modules based on the interdigitated back-contacted silicon heterojunction (IBC-SHJ) solar cell concept
targeting cells with efficiency above 26.0% and corresponding solar modules with efficiency above 22.0%.
development of a new industrial manufacturing tool and low-cost processes enabling a competitive IBC-SHJ solar module cost of < 0.35 €/Wp.

10. Nanostructures for photovoltaic conversion
planar solar cells.
(b) radial junction thin-film PIN solar cells.
Illustration from:
Soumyadeep Misra, Linwei Yu, Wanghua Chen, Martin Foldyna, and Pere Roca i Cabarrocas. ‘A Review on Plasma-Assisted VLS Synthesis of Silicon Nanowires and Radial Junction Solar Cells’. Journal of Physics D: Applied Physics 47 (2014):

11. A. Fejfar - Czech French Barrande workshop
Disorder ZOO:
Shading
Crossing
Kinks
Crowding
A. Fejfar - Czech French Barrande workshop

12. Exploration by Atomic force microscopy
A. Fejfar - Czech French Barrande workshop

13. A. Fejfar - Czech French Barrande workshop
Comparison of scales
Detail:
2 cm
Sample:
A. Fejfar - Czech French Barrande workshop

14. C-AFM probing of Si radial junction solar cells
[Fejfar et al., Solar Energy Materials & Solar Cells 2014]
A. Fejfar - Czech French Barrande workshop

15. Conclusions and acknowledgements
Active Czech French cooperation in photovoltaic R&D illustrated: FP7: PolySiMode, H2020 NextBase
Barrande project: Study of the growth and properites of silicon nanowires for nanoelectronic applications
Project NextBase (Next-generation interdigitated back-contacted silicon heterojunction solar cells and modules by design and process innovations)supported by European Commision in H2020-LCE by GA
Cooperation with LPICM, CNRS, Ecole Polytechnique
supported by Barrande mobility project  (French 35790XK and Czech 7AMB16FR040)
A. Fejfar - Czech French Barrande workshop

16. A. Fejfar - Czech French Barrande workshop
International Summer School on Physics at Nanoscale, Devět Skal:
A. Fejfar - Czech French Barrande workshop