Periodic Reporting for period 1 - PerovSAMs (Molecular glues for perovskite materials)
Période du rapport: 2018-01-01 au 2019-12-31
This project is encompassed within the global effort to boost the development of emerging halide perovskite technology. In particular, PerovSAMs has focussed on developing different strategies to overcome some of the bottlenecks that still prevent the widespread use of halide perovskites.
First, we have worked on enhancing the stability of these materials by coating them with ultrathin layers (self-assembled monolayers) of different moisture-resistant organic molecules. Second, we have developed low-toxicity alternatives to the most commonly used lead-based perovskites. Furthermore, these low-toxicity alternatives have been synthesized through green chemistry solvent-free approaches. Third, we have worked on understading in-depth the fundamental structural and optoelectronic properties of the so-formed materials. Fourth, we have implemented these materials in high efficiency devices: in particular a single-junction solar cell with power conversion efficiency approaching 20% and a red-emitting LED with external quantum efficiency exceeding 3%.
On one hand, we have developed a novel approach of mechanochemical synthesis for the formation of high-purity halide perovskites and related materials, with a special focus on low-toxicity alternatives to the most commonly-used lead compounds. On the other hand we have implemented several of the so-formed materials in high-efficiency optoelectronic devices such as solar cells and light-emitting diodes.