Context and Approach
Starting with the “perovskite fever” in 2013 in the field of photovoltaics, hybrid organic-inorganic perovskite materials have now become a key player in applications for optoelectronics, including solar cell, light emitting diode, laser and sensing. The Project Group “Perovskite” aims at developing novel perovskite optoelectronic devices in which light-matter interaction mechanisms are engineered in the subwavelength scale. This is achieved by patterning the perovskite material into metasurface structures. Functionalities and physical properties of perovskite devices will be implemented/enhanced by exploring innovative photonics concepts such as photon management, dispersion engineering, polaritonic physics at room temperature.
Nanophotonic concepts for perovskite solarcells
Perovskite has now become an alternative solution for silicon technology in the field of photovoltaics. Our distinctive approach is to implement nanophotonic concepts for boosting perovskite solar cell performance, while keeping its low-cost and solution-based fabrication process (see Fig.1). Different photon management strategies (light-trapping, photon recycling, up-conversion) are combined to enhance energy conversion efficiency of single junction perovskite solar cell and tandem perovskite-silicon solar cell.
Perovskite-based polaritonic devices
Exciton-polaritons are quasiparticles arising from the strong coupling regime between excitons in semiconductor and photons of resonant cavity. Polaritonic devices, inherited the best features of excitonic and photonic components, is a prominent platform to study fundamental physics of interacting bosons, as well as novel all-optical devices. Our original approach is to elaborate polaritons at room temperature by coupling perovskite excitons and Bloch photons of perovskite periodical metasurface (see Fig.2.a). Polaritonic properties (effective mass, group velocity, density of states …) are tailored on-demand via energy-momentum dispersion engineering (Fig.2.b,c).
Perovskite-based emitting devices
As direct band-gap semiconductor, perovskite material exhibit remarkable optical properties for emitting devices, such as tunable bandgap across the visible range, high luminescence quantum yield and narrow emission linewidth. In this topic, we study different original mechanisms to control the far-field emission of perovskite-based light emitting diodes and micro-lasers (Figs.3): coupling perovskite quantum dots to photonic exceptional points, filtering perovskite random lasing via vertical cavity, coupling perovskite thin-film to Bloch resonances…
- Polaritonic devices based on hybrid perovskite in novel photonic crystal design – POPEYE
- Electrically pumped hybrid perovskites based light-emitting devices – EMIPERO
- Coordinator: Hai Son Nguyen
- Permanent: Christian Seassal, Erwann Fourmond, Emmanuel Drouard, Céline Chevallie
- PhD : Florian Berry, Nguyen Ha My Dang, Raphael Mermet Lyaudoz