Voici l’abstract complet de notre projet! Désolé c’est en anglais!

Dye-Sensitized Solar Cells (DSSC’s) are widely regarded as the most promising third generation photovoltaic technology. DSSC’s have superior low-light energy harvesting performances: they are efficient indoors solar cells suitable for shaded and diffuse conditions.

Commercial DSSC modules mainly use metal-based dyes with an expensive Ruthenium complex. To decrease the cost of the modules, new DSSC sensitized with vegetable dyes have appeared. Efficiency of the modules based on vegetable sensitizer is only 1% compared to 5% for best metal-based ones. Unlike artificial sensitizers, vegetable dyes have their molecular structure designed by nature.

In this study, different vegetable sensitizers (from cabbage, berries, algae) and operating conditions (concentration, pH …) are investigated.

Educational demonstration cell kits both with Ruthenium and metal-free organic dyes1,3 are investigated in order to evaluate the figures of merit of the cells. The electrical characteristics are performed both using a 1-sun solar simulator or with different indoor light conditions.

Furthermore, a simple steady-state model is being developed, based on linear differential equations, allowing us to evaluate different limiting factors for the DSSC energy conversion efficiency.

We believe that such a project about bioinspired innovation could be a very fascinating topic to engage in communicating fundamental science principle behind technological devices, an example of science as a collective adventure, and a discussion about a sustainable world for future generations.