Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.674
Publication date: 16th December 2024
Layered metal-halide perovskites, or two-dimensional perovskites, can be synthesized in solution, and their optical and electronic properties can be tuned by changing their composition. In this talk, I will present a molecular templating method that restricted crystal growth along all crystallographic directions except for [110] and promoted one-dimensional growth out of the inherently layered 2D structures. This templating effect is achieved via introducing directional intermolecular interlayer hydrogen bonding interactions. This approach is widely applicable to synthesize a range of high-quality layered perovskite nanowires with large aspect ratios and tunable organic-inorganic chemical compositions (including Sn and Pb based perovskites, different quantum well thickness, and different halides). These nanowires form exceptionally well-defined and flexible cavities that exhibited a wide range of unusual optical properties beyond those of conventional perovskite nanowires. We observed anisotropic emission polarization, low-loss waveguiding (below 3 decibels per millimeter), and efficient low-threshold light amplification (below 20 microjoules per square centimeter). The 1D-2D mixed dimensional nanostructures provide unprecedented opportunities for next-generation optoelectronics and photonics.
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