Visit 9: Opto-Electronics

The Laboratory for Photovoltaics has unique expertise in the field of opto-electronic characterisation of semiconductors and semiconductors devices. Discover how it measures the number of photogenerated electrons lost in an optoelectronic device due to recombination and how it makes its record efficiency solar cells. See the machine where it prepares new transparent conductive films that are as conducting as classical ones but more transparent in the infrared.


The Laboratory of Photovoltaics is one of only a few groups worldwide that use calibrated photoluminescence (i.e. photon counting) to quantify the amount of recombination of photogenerated carriers, an important information in any opto-electronic device. The Laboratory has several on-going international industry collaborations and is open to more.

The team of about 10 researches is able to measure photoluminescence, also spatially resolved, which provides information about the electronic structure of semiconductor materials, their absorption, their recombination and their homogeneity. Its speciality is to measure spatial resolution on a microscale. The Laboratory also measures the capacitance of semiconductor devices, which provides information about their electronic structure, doping and wanted and unwanted electronic barriers, and the Hall effect, which provides information about the electronic transport properties of materials, such as their electrical conductivity. The visit will showcase all instruments used, as well as a preparation lab with state-of-the-art semiconductor deposition equipment.

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