Oriented Perovskite Nanocrystal Arrays for Application in Optoelectronics

The development of efficient and stable perovskite nanomaterials is crucial for advancing solar cell applications. This study investigates the scaffold-guided crystallization of α-FAPbI₃ nanowires stabilized with butylammonium. Using a two-step immersion technique, we achieve vertically aligned nanowire arrays grown from TiO₂ scaffolds, exhibiting superior phase purity and enhanced photoluminescence properties. These structures demonstrate significant potential in solar cells due to their improved crystallinity and optimized charge carrier transfer.¹ Additionally, we explore the optical anisotropy of chiral low-dimensional perovskites, specifically (S/R-MBA)₂PbI₄and (S/R-MBA)PbI₃, finding that the anisotropy is maximum along the fast growth direction. Employing a two-step method, we successfully fabricate vertical 1D chiral perovskite nanoplate arrays, further highlighting the potential of these materials for next-generation optoelectronic devices with tailored properties.<br/>(1) Alaei, Aida, et al. "Scaffold-guided crystallization of oriented α-FAPbI₃ nanowire arrays for solar cells." <i>ACS Applied Materials & Interfaces</i> 15.48 (2023): 56127-56137