A spectroscopy platform to probe materials at the nanometer and picosecond scale.
A cathodoluminescence tool has been supplied and installed by Attolight at C2N at the end of 2015. It has been upgraded in 2019 to include a streak camera.
Its very versatile configuration offers many possibilities based on steady-state excitation (simultaneous mapping of cathodoluminescence, EBIC and SEM) and pulsed excitation (time-resolved cathodoluminescence).
- continuous cathodoluminescence (CL)
- time-resolved CL (TRCL)
- secondary electron microscopy (SEM)
- electron-beam-induced current (EBIC)
- spectral range: 250 nm – 1.7 µm
- sample temperature: 10K-350K
- temporal resolution down to 10 ps
- spatial resolution down to 10 nm
- quantitative analysis, no optical alignement, ultra-stable stage
Time-resolved CL is detected either with a Hamamatsu streak camera, or with a Time-Correlated Single Photon Counting (TCSPC) module equipped with a PM or an APD detector.
Our scientific program on PV materials focuses on III-V nanowires, polycristalline thin films (CdTe, CIGS), perovskites,… Recent results obtained by our team include the determination of n-type doping of single nanowires.