Ludovic Tortech
Maître de
Conférences / Assistant Professor, Université Pierre et Marie Curie
Contact :
Tel: +33 1 69 08 65 56
CEA de Saclay
DSM – IRAMIS – NIMBE,
Bat 462, pièce 7
91191 Gif sur Yvette
Academic research team :
Edifices PolyMétalliques (E-POM)
CEA (Alternative
Energies and Atomic Energy Commission) research team:
Laboratoire
d'Innovation en Chimie des Surfaces et Nanosciences (LICSEN)
µ-CV
2006- :
assistant professor, université Pierre et Marie
Curie, Institut Parisien de Chimie Moléculaire (IPCM)
2004-2006: Post-doctoral fellow on surface
modification and adhesion properties, Collège de
France
2003-2004 :
Post-doctoral fellow on tribological and mechanical
properties at interfaces, ESPCI (Engineer scientific school) in Paris
2000-2003 : PhD thesis,
Synthesis of highly fluorinated compounds for electrical and tribological applications, Université
de Nice-Sophia Antipolis
1999 : Master of Science, Université Paris-Sud
Short presentation
Ludovic Tortech
was recruited as assistant professor by the university Pierre et Marie Curie, UPMC,
(part of the consortium “Sorbonne
Université”) to work at
the CEA (in an academic group of IPCM) on eltronic molecular
and more specifically organic photovoltaic.
At the beginning of 2014 he has joined the e-POM research team of UPMC and later the LICSEN. The re-enforce the collaboration between the
university and CEA a consortium agreement was signed. He is sharing his time
between the teaching activities and research.
Research Topics
The different
topics of research deal with:
1/ Synthesis of original organic
molecules
2/ Thin
films elaboration and characterization
3/ Organic thin film for organic
spintronic
4/ Fabrication and characterization
of organic solar cells
The objectives are
to go in deeper and better understanding in the electronic processes in the
electronic molecular devices we study.
Topic 1
We
developed the synthesis of original organic1,2 (and organo-metallic) molecules principally used as interfacial
layer to inject electron onto the p-type
of the active layer of organic solar cells.
Among the
molecules synthesized some structures are:
Topic 2
We are deposing
molecules (or metal) onto substrates, principally ITO on glass. At the
laboratory we are equipped of a high vacuum thermal evaporator and a spin-coater
into a set of gloves box.
The layer at
first are characterized using an atonic force
microscope either in classical contact mode or electrical and contact. This
last mode allows to access to electrical and electronical out of the plane of thin layers such as in the
2 examples below:
Example 12: 20 nm of
DITPY onto ITO in current sensing AFM
Example 23: 140 nm of
POM, K6[P2W18O62], onto ITO, left
is topography and right is current mapping
Topic 3
In
collaboration with Jean-Baptiste
Moussy, from SPEC (CEA), we are
developing original multilayer structures based on the structure metal/orga/metal to elaborate spin valve4,5.
Topic 4
The ending of
synthesizing molecules and depositing it is to make devices. At the end most of
the devices are photovoltaic cells. The cells are tested using an optical bench
of measurement in the dark, under white illumination (100mW/cm²) and
monochromatic light.
Example 16: integration
of CpCoCb as p-type (in association to PCBM) giving
1.9% (2.1%@20mW)
Example 2: 20
nm thin film of DITPY as interfacial at the anodic surface of a P3HT:PCBM organic solar cell exhibiting almost 3% and proved to
be an efficient hole collector to compensate the charge accumulation in P3HT
Supervision and funding
Since the
beginning of his research activities 3 PhDs under his supervision were defend
in the thematic of organic solar cells. In parallele
several fellow BC’s and Masters have performed their laboratory training with
us.
In 2013 the région île de France, across C’Nano DIM Nano K funded the PhD
of Qirong Zhu (2013-2016) for a collaborative project (coll. Anna Proust PhD Director
and Nick
Barrett)
In 2014 the LabEx Michem funded a
collaborative project (coll. LCPMR,
François Rochet, Jean-jacques gallet
and Fabrice Bournel) to finance the PhD grant of Quentin
Arnoux. the
physics consortium of the plateau de Saclay (RTRA)
has funded a collaborative spintronic project (coll. Jean-Baptiste
Moussy and Talal Mallah).
Teaching
192 hours of
teaching is due to university and dispatched from bachelor to graduate leveling
in:
Ø Organic
chemistry : undergraduate
Ø Photovoltaic
cells: graduate and master level
Reference
(1) Bertrand, G.; Tortech, L.; Fichou, D.; Malacria,
M.; Aubert, C.; Gandon, V. An Improved Protocol for the Synthesis of [(η4-C4R4)Co(η5-C5H5)]
Complexes. Organometallics 2012, 31, 126–132.
(2) Berny, S.;
Tortech, L.; Véber, M.; Fichou, D. Dithiapyrannylidenes as Efficient Hole
Collection Interfacial Layers in Organic Solar Cells. ACS Appl. Mater.
Interfaces 2010, 2, 3059–3068.
(3) Alaaeddine,
M.; Zhu, Q.; Fichou, D.; Izzet, G.; Rault, J. E.; Barrett, N.; Proust, A.;
Tortech, L. Enhancement of Photovoltaic Efficiency by Insertion of a Polyoxometalate
Layer at the Anode of an Organic Solar Cell. Inorg. Chem. 2014, 1,
682–688.
(4) Blouzon,
C.; Ott, F.; Tortech, L.; Fichou, D.; Moussy, J.-B. Anti-Ferromagnetic Coupling
in Hybrid Magnetic Tunnel Junctions Mediated by Monomolecular Layers of Α-Sexithiophene.
Appl. Phys. Lett. 2013, 103, 042417.
(5) Berny, S.;
Tortech, L.; Fichou, D.; Matzen, S.; Moussy, J.-B. Organic-Inorganic Magnetic
Tunnel Heterojunctions Based on Dithiapyrannylidene Ultrathin Films Grown on
Fe[sub 3]O[sub 4](111). Appl. Phys. Lett. 2010, 97,
253303.
(6) Bertrand,
G. H. V.; Tortech, L.; Gandon, V.; Aubert, C.; Fichou, D. Synthesis and
Photovoltaic Performances in Solution-Processed BHJs of
Oligothiophene-Substituted Organocobalt Complexes [(η4-C4(nT)4)Co(η5-C5H5)]. Chem. Commun. 2014, 50, 8663–8666.