Structure-controlled optical thermoresponse in Ruddlesden-Popper layered perovskites

• Main Authors: Cortecchia, Daniele, Salim, Teddy, Bruno, Annalisa, Lam, Yeng Ming, Soci, Cesare, Neutzner, S., Yin, J., Srimath Kandada, A. R., Martí-Rujas, J., Petrozza, A.
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2018
• Subjects: Perovskites; DRNTU::Science::Physics; Optical Thermoresponse
• Online Access: https://hdl.handle.net/10356/89201; http://hdl.handle.net/10220/47029
• Institution: Nanyang Technological University

Ruddlesden-Popper perovskites are highly attractive for light-emitting and photonic applications. In these exceptionally deformable frameworks, structural properties strongly impact on the energetic landscape of the material; thus, it is crucial to establish a correlation between the structure and optoelectronic characteristics. Here, we study the structural transformations induced by phase transitions in the butylammonium-based series (BA)2(MA)n−1[PbnI3n+1] (n = 1 and n = 2). We show how thermally driven lattice contraction and changes in crystal packing affect their characteristic absorption and photoluminescence. These findings provide new insights for functional perovskites’ rational design, highlighting the possibility to tune the structural properties through external stimuli to control their functionalities on-demand.