PHEMADIC department

Staff: 35 persons Département phemadic

  • - 15 permanent researchers, assistant professors or professors
  • - 5 permanent engineers or technicians
  • - 15 PhDs, post-doctoral fellows or invited researchers

Head of department : Jean-Paul Kleider

PHEMADIC activities can rely on characterization platforms of various types, physico-chemical, tribological, structural, but mainly electronic and opto-electronic, that were precedingly shared between two teams of former LGEP (CE and SCM). This ensemble of platforms is fed by a specific research activity dedicated to instrumentation developments, and serves as a basis for other research activities following two main streams: "materials and devices", and "interfaces and contacts", as illustrated on the diagram below.

PHEMADIC Materials and devices Semiconductors and Insulators PV cells and Modules Other devices Instrumentation developpements Near Fields Microscopy Photocurrents Luminescence Tribology, fretting Coupling techniques Interfaces and Contacts Heterojunctions 2D layers Electrical contacts

  Our characterization platforms cover spatial domains from the "nano" to the "macro" aspects and they consist of various types of techniques:

  • - near field techniques (AFM, CP-AFM, "résiscope", "capascope")
  • - electron spectroscopies (XPS, UPS, Auger)
  • - micro-Raman and micro-luminescence spectroscopies
  • - various electrical characterizations: measurements of currents as a function of applied bias and temperature, measurements of photocurrents in various modes (SSPC, MPC, CPM, FTPS, SSPG), most of them in a cryostat to allow temperature dependent measurements, admittance (capacitance and conductance as a function of frequency, temperature and polarisation, DLTS)
  • - tribology and fretting
  • - optical spectroscopies (transmission/reflection in the near UV, visible and near infra-red, FTIR)
  • - monitoring and study of modules and photovoltaic panels

Each of the 3 big activities has several dedicated topics.

For the materials and devices activity, studies are focused on insulators and semiconductors, photovoltaic cells and modules, as well as other devices (memories). The "interfaces and contacts" activity is mainly dedicated to various types of heterojunctions, of 2D layers (graphene, …) and to electrical contacts. Finally, our instrumentation developments are dedicated to the near field techniques, to the photocurrent techniques, to luminescence (photoluminescence, electroluminescence), to tribology and fretting, et to the coupling of techniques.

There are several application domains concerned by our studies. The most developed at the moment is the photovoltaic domain, but optoelectronic, nanoelectronic, and electrical contacts are also concerned.