Publication date: 13th July 2024
Interfacing nanostructured materials with low-dimensional perovskites offers unprecedented opportunities for modulating their optoelectronic characteristics. We demonstrate a novel approach to modify the surface of low-dimensional perovskite films by incorporating ionic nanostructures. By tailoring the composition of these nanostructures, we selectively trigger interfacial reactions that alter the optical and electronic properties of the perovskite, resulting in tunable emission across the visible spectrum. Our studies indicate that these interfacial processes involve multiple reaction pathways with varying kinetics, contributing to the observed property modifications. The modified perovskite films exhibit enhanced photostability and superior optoelectronic characteristics when employed as active emissive layers in electroluminescent devices. Notably, this method allows for precise control over the emission wavelength without compromising the structural integrity of the perovskite layer. Furthermore, we observe a significant improvement in the charge carrier dynamics, leading to enhanced quantum efficiency in the resulting devices. This versatile strategy enables precise control over the optoelectronic properties of perovskite materials, with potential applications in tunable light sources, high-performance displays, and other advanced optoelectronic devices. Our findings pave the way for the development of next-generation perovskite-based technologies with improved stability, efficiency, and color purity.
This work was supported by the Technology Innovation Program (20025062, Development of 100 um Pixel-Pitch High Resolution Flexible X-ray Detectors based on Nanocomposites) funded By the Ministry of Trade, Industry & Energy(MOTIE, Korea)
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