NIT Rourkela scientists develop lead-free light-emitting materials for safer lighting and security applications
A collaboration between NIT Rourkela, IIT Guwahati, IIT Bombay, and NISER Bhubaneswar created new light-emitting materials using bismuth-based compounds instead of toxic lead. These materials undergo reversible structural changes when exposed to heat and moisture, altering their light emission. The research aims to replace harmful lead-based photoluminescent materials. Applications include security labels, document protection, and anti-counterfeiting measures for certificates and signatures.
Key points
- Bismuth-based compounds developed as lead-free alternative to photoluminescent materials
- Materials emit different light colors under UV exposure and respond to heat/moisture changes
- Potential uses in security systems, sensors, and anti-counterfeiting applications
- Addresses environmental and health concerns from lead toxicity
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