SONATA 20

Project description

Blue-emitting perovskites belong to promising class of materials for next-generation optoelectronic device technologies. However, achieving electroluminescence performance and external quantum efficiency comparable to red and green counterparts remains challenging due to their wide bandgap, which creates deep trap states. Other common factors such as halide phase segregation and Joule heating also remain challenging issues. Introducing 2D Ruddlesden-Popper perovskites, which comprise layered structures offering high photoluminescence quantum yield, narrow emission bandwidth, strong exciton binding energy, and low-cost solution processability. Yet, issues such as phase purity, material stability, and thermal degradation limit device performance and longevity. By rationally designing spacer cations, a key structural component governing van der Waals interactions and quantum well formation, the project aims to enhance phase stability, reduce non-radiative losses, and improve thermal dissipation management. Structural and optoelectronic analyses using X-ray diffraction, spectroscopy, and electron microscopy will reveal how cation structure correlates with device efficiency and durability. The outcomes will guide the development of stable, high-efficiency blue PeLEDs, advancing the practical realization of high colour-purity display technologies. 

Project members

• Samrat Das Adhikari

Publications