Tailored crystals on-demand: gaining a full understanding of the crystallization of low-dimensional hybrid perovskites
Low-dimensional hybrid perovskites are a class of versatile hybrid materials that are highly promising for various optoelectronic applications, including solar cells, photodetectors, light-emitting diodes, and lasers. However, currently, fundamental knowledge of their crystal growth behavior is lacking. This hinders the rational design of this class of materials, such that their crystallization is often based on trial-and-error approaches. With this FWO project, we aim to gain a deep understanding of their crystallization mechanisms, with the goal of achieving full control over their crystal growth.
Hybrid organic-inorganic perovskites have been in the spotlight for the past decade, mainly due to the unprecedented increase in the power conversion efficiency of perovskite solar cells from 14.1% to 25.7% over this period. Furthermore, HOIPs have proven to be a highly versatile class of materials that have seen significant progress in various optoelectronic applications beyond solar cells, such as light-emitting diodes (LEDs), lasers, and photodetectors. HOIPs can be prepared with their inorganic frameworks spanning the whole range of dimensionalities: 3D, 2D, 1D, and 0D. This results in a class of hybrid materials with highly tunable compositions, structures, and properties. After the rapid ascent of 3D HOIPs in optoelectronics, 2D HOIPs are currently receiving increased research attention due to their significantly enhanced environmental stability and a much higher degree of compositional flexibility than their 3D counterparts. However, limited insights into their crystal growth behavior are currently available.
With this FWO project, we aim to gain a fundamental understanding of the crystal growth of this versatile class of hybrid materials. To achieve this, the project combines the expertise of research groups at Hasselt University (UHasselt), Ghent University (UGent) and the University of Mons (UMons):