Bengaluru Researchers Develop More Sensitive Scandium Nitride Thin-Film Material for Heat Detection
According to researchers at the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), a new thin-film material made from scandium nitride generates an unusually large electrical signal when subjected to a temperature difference. The material produces a voltage response exceeding 124 millivolts per degree Kelvin near room temperature, a figure roughly 100 times higher than conventional theory predicts for standard solid materials.
How Scandium Nitride Enhances the Seebeck Effect
When one side of a material junction is heated, temperature differences prompt charged particles to move and create a voltage, a phenomenon known as the Seebeck effect. Most inorganic solid materials typically yield between 100 and 500 microvolts per Kelvin. However, the JNCASR-led team altered this dynamic by introducing magnesium into scandium nitride while preserving a high concentration of charged impurities, according to study details published in Science.
This modification creates distinct variations in the material’s electrical properties. Instead of flowing smoothly, charges become trapped within tiny conducting regions separated by barriers. When temperatures shift, charges must cross these barriers, which generates a substantially amplified voltage response compared to ordinary semiconductors.
Did you know?
In experiments conducted by the research team, a film approximately 200 nanometres thick delivered a response of -124.6 millivolts per Kelvin at roughly 350 Kelvin (77°C), while an even thinner 7.5-nanometre film yielded -83.41 millivolts per Kelvin near room temperature.
Practical Applications in Thermal Imaging and Energy Harvesting
Led by Renuka Karanje and Dheemahi Rao under the guidance of Bivas Saha, the JNCASR team collaborated with researchers from the University of Sydney and the Indian Institute of Science (IISc). The group successfully demonstrated this high-voltage effect inside a prototype photon sensor, proving its viability for real-world devices.
According to the researchers, the breakthrough directly applies to highly sensitive temperature sensors, thermal imaging systems, and precise heat-flow measurements. Furthermore, the technology holds promise for energy-harvesting applications designed to convert otherwise wasted industrial and electronic heat directly into usable electricity.
Broader Infrastructure and Industrial Impacts
According to regional reporting by Urban Acres, this advanced materials breakthrough expands Bengaluru’s growing ecosystem for hardware and sensor innovation. Modern buildings, factories, and energy grids rely heavily on thermal monitoring to maintain safe operating conditions and prevent equipment failures.
More responsive sensors can detect subtle environmental or mechanical temperature shifts much earlier than legacy hardware. This capability supports improved energy efficiency by identifying overheating equipment or cooling inefficiencies before they escalate into major maintenance issues.
Frequently Asked Questions
What is the primary material used in the new sensors?
The sensors are built using scandium nitride thin-film doped with magnesium to alter electrical charge movement.
Who led the research study?
The study was led by Renuka Karanje and Dheemahi Rao under the guidance of Bivas Saha at JNCASR, alongside team members Diksha Dadhich and Sourav Rudra.
Have the researchers protected this intellectual property?
Yes, the team has filed an Indian patent application covering the newly developed thin-film materials and sensor designs.
Join the Discussion
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