Manufacturers of infrared cameras are facing a growing challenge. Many of the materials used in today’s detectors, including toxic heavy metals, are now restricted under environmental regulations. As a result, companies often find themselves forced to choose between maintaining performance or meeting compliance standards.

These tightening rules have slowed the spread of infrared technology in civilian markets, even as interest rises in areas such as self-driving vehicles, medical imaging, and national security.

A team from NYU Tandon School of Engineering has introduced a promising alternative in a study published in ACS Applied Materials & Interfaces. Their approach replaces mercury, lead, and other restricted substances with environmentally friendly quantum dots that can detect infrared light without relying on hazardous materials.

A Quantum Dot Alternative
Instead of the traditional, slow, and costly fabrication methods that require atoms to be placed with extreme precision across detector pixels (similar to carefully assembling a puzzle under a microscope), the researchers turned to colloidal quantum dots.

These quantum dots are created entirely in liquid form, like mixing an ink, and then applied using scalable coating techniques already common in industries such as packaging and newspaper printing. Moving from atom-by-atom construction to this solution-based process could slash production costs and make large-scale commercial use of infrared detectors far more feasible.