Publication date: 17th July 2025
Manganese (Mn) doping in metal-halide perovskites presents a promising strategy for tuning their optoelectronic properties. The incorporation of Mn2+ ions introduces a well-defined optically active energy level within the bandgap of violet- and blue-emitting perovskites, resulting in dual emission: one originating from the perovskite band edge and the other from the Mn2+ dopant states (4T1 → 6A1 transition). This unique emission behavior enhances the photoluminescence quantum yield (PLQY), facilitates rapid exciton diffusion, and improves the material's stability.
In this presentation, I will discuss the optoelectronic properties of highly luminescent Mn2+-doped two-dimensional (2D) Ruddlesden–Popper (RP) lead bromide hybrid perovskites. In particular, I will focus on how variations in organic spacer ligands (L) and layer thickness (n) influence the light-emitting characteristics of these materials. In addition, I will also examine the charge transport properties, specifically exciton diffusion, of these perovskites by correlating them with crystal rigidity and electron–phonon coupling strength. Finally, I will demonstrate the potential of these doped perovskites for white light-emitting diode (WLED) applications.Thus, this talk aims to provide deeper insight into the structure–optical property relationships in Mn-doped 2D perovskites, offering a foundation for the rational design of next-generation luminescent materials.
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