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Accueil > Groupes de Recherche > Lumière et Matière


par Agnès GP, Gérald Ledru - publié le , mis à jour le

• Platform for the production and characterization of organic luminescent components (OLEDs, OLECs, OFETs). It consists of 3 "dry" glove boxes including small-molecule vacuum evaporation systems, RF-sputtering for the production of transparent electrodes and a box for the electrical and spectrophotometric characterization of the components. The device is supplemented by a "wet" installation allowing the spin-coating and treatments in liquid phase (polymers). The production set-up is coupled with characterization tools : Raman microscope, AFM / KFM, near-field optical microscope, micro-pin test station.

• Spectrophotometric (from 200 nm to 1000nm) qualification platform that includes : spectroscopic experimental set-ups for emission and absorption spectroscopy (2 ultra-high and several lower resolution spectrometers ; a fast CCD camera (2 ns aperture time, 20 kHz max sampling frequency) ; a close-field goniometer on table and a far-field class B goniometer for photometric studies ; a series of integrating spheres adapted to various light sources (including two 1.8m diameter devices) ; all necessary portable equipment for in-situ measurements (spectroradiometers, luminance and illuminance-meters, video-photometer, spectro-luminance and spectro-illuminance meters, etc.)

• Solid lighting components aging benches : LM group has a bench dedicated to the LED components and a second one dedicated to OLEDs. Both benches allow the testing of components under thermal and/or electrical stress. The two set-ups were developed and realized in the LAPLACE laboratory. The bench dedicated to LEDs has four groups of components of different technologies. Each group is composed of 32 samples ; a total of 128 LEDs is subjected to aging. The bench dedicated to OLEDs is composed of 4 groups of 4 OLEDs each. Each group is submitted to a different temperature and each sample of the group has a different current. The components are electrically characterized to obtain the I(V) curve using the meter sources and C(V) using a SOLARTRON impedance spectrometer and also spectroscopically to determine the drift of their colorimetric characteristics.