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The performance of next-generation optoelectronic devices critically depends on controlling materials across multiple length scales. This talk presents fabrication strategies that bridge nanoscale precision with microscale architectural design to engineer efficient optoelectronic platforms. At the nanoscale, plasmonic gold nano-islands integrated with halide perovskites enable hot-hole extraction, leading to self-powered photodetectors operating across the full ultraviolet spectrum. At the microscale, crystal-phase engineered perovskite microstructures demonstrate reduced defects and improved charge transport. Finally, a natureinspired breath-figure approach enables scalable porous architectures that enhance light–matter interaction. Together, these strategies establish a unified micro–nano fabrication framework for advanced optoelectronics. References: 1. K. D. M. Rao*, et al., On-Chip Full-UV-Band Photodetectors Enabled by Hot Hole Extraction, ACS Nano, 2025, 19(6), 6309–6319. 2. K. D. M. Rao*, et al., Benign Mid-Gap Halide Vacancy States in 2D-Bismuth-Based Halide Perovskite Microcrystals for Enhanced Broadband Photodetectors, Materials Horizons, 2025, 12, 3865–3877. 3. K. D. M. Rao*, et al., Nature-Inspired Halide Perovskite Breath Figures: Unleashing Enhanced Light–Matter Interaction, Advanced Optical Materials, 2024, 12(9), 2400353. |