Speaker
Description
Hybrid perovskite solar cells have been capturing an enormous research interest in photovoltaics due to their extraordinary performances and ease of fabrication [1]. However, low device lifetime, mainly due to device degradation upon water exposure, challenges their near-future commercialization. Diverse technological approaches have been proposed, but still not sufficient, requesting a radically new solution. In this talk, I will show a new concept by using a different class of perovskites, arranging into a two-dimensional (2D) structure, i.e. resembling natural quantum wells. 2D perovskites show higher stability than the 3D counterparts. Engineering 2D/3D interfaces is the core innovation which I will present as a new way to boost device efficiency and stability [2,3].
[1] http://www.nrel.gov/ncpv/images/efficiency_chart.jpg.
[2] J.-P. Correa-Baena et al., Science, 358 (2017), 739–744.
[3] G. Grancini et al., Nat. Commun., 8 (2017), ncomms15684, Jun. 2017.
