Abstract: Photoelectric detection is a critical technology aligned with national strategic priorities, demonstrating significant application value in defense, medicine, and industry. Lead-free halide perovskites, as an emerging class of semiconductor materials, exhibit outstanding optoelectronic properties, simple synthesis processes, low cost, and minimal toxicity, making them highly promising for commercialization in photodetection. This study integrates frontier materials research into a comprehensive chemistry experiment by focusing on the lead-free perovskite (3-AMP)BiI₅. The experiment involves optimizing thinfilm quality and passivating surface defects to enhance light absorption, improve charge transport, and suppress carrier recombination, thereby enabling the fabrication of high-performance photodetectors and exploring their imaging applications. The experimental procedure encompasses material synthesis, performance characterization, and application investigation, offering straightforward operation, engaging content, and rich educational value. Two years of classroom implementation confirm the experiment’s feasibility, adaptability, and suitability for undergraduate teaching across different proficiency levels.

Key words: Photoelectric detector, Halide perovskite, Lead free, Thin film, Imaging