研究目的
Investigating the temperature-tunable reconfiguration of photonic modes in periodically nanostructured perovskite (MAPbI3) film probed by enhanced photoluminescence.
研究成果
The study demonstrates polarized and narrowband PL from perovskite nanograting enhanced by two waveguiding modes with high Q-factors, showing sharp PL enhancement at resonant modes due to phase transition in MAPbI3 around 130 K. This design is applicable for low-intensity applications and aids in designing optimized surface structures for enhanced outcoupling from perovskite-based light-emitting devices.
研究不足
The study is limited by the fabrication process's control over the grating depth and the material losses in MAPbI3 perovskite at certain wavelengths.
1：Experimental Design and Method Selection:
The study involves the fabrication of perovskite nanogratings using nanoimprint lithography and the analysis of their photoluminescence properties under varying temperatures and angles.
2：Sample Selection and Data Sources:
Perovskite (MAPbI3) thin films were fabricated by solvent engineering method and nanostructured using nanoimprint lithography.
3：List of Experimental Equipment and Materials:
SEM (JEOL, Cross Beam) for visualization, Horiba LabRam HR spectrometer for PL measurements, and a cryo-chamber for temperature dependence measurements.
4：Experimental Procedures and Operational Workflow:
The PL spectra were measured at room temperature and low temperatures, with angular and polarization dependencies analyzed.
5：Data Analysis Methods:
The experimental results were compared with theoretical simulations using COMSOL Multiphysics software.
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