Perovskite-based photoluminescent detection of lead particles in gunshot residue
Year: 2025
Type: article
Abstract: Gunshot residue (GSR) analysis is crucial for forensic investigations of shooting incidents, but current methods are time-consuming, laborious, and provide limited spatial resolution. We introduce photoluminescent lead analysis (PL-Pb) for instant high-resolution GSR detection. Lead particles in GSR react into lead halide perovskite semiconductors that emit bright green light under ultraviolet irradiation. PL-Pb enables trace detection of GSR, including ricochet markings, bullet wipes, and combustion plumes. Our method visualizes fine details like rifling patterns and facilitates and extends shooting distance reconstructions. We find that PL-Pb is also suitable for rapid presumptive testing of shooting suspect’s hands, clothes, shoes, and other relevant objects. The instant results, sensitivity, and spatial resolution of perovskite-based detection of lead-containing micro-traces offer unprecedented opportunities for forensic investigations and environmental studies on lead particles. • A novel forensic method for detecting gunshot residue (GSR) using photoluminescent perovskites is presented. • This is the first application of perovskite semiconductors in forensic science. • The method enables detection of trace GSR for shooting distance estimation and crime scene reconstruction. • It supports rapid pre-screening of suspects and other forensic casework applications. • The technique introduces a new application field for perovskite-based materials in criminal investigations.
Source: Forensic Science International
Language: English
Subfield: Safety Research
Field: Social Sciences
Domain: Social Sciences
Open Access status: hybrid
Estimated APC paid: $4,580
OpenAlex ID: W4408052361