IIT Guwahati

Researchers from the Indian Institute of Technology (IIT) Guwahati have developed an innovative and affordable photodetector using advanced materials and precision techniques. The new device integrates formamidinium-based perovskite and plasmonic nanoparticles, promising enhanced light detection capabilities. This breakthrough holds significant potential for applications in healthcare, environmental monitoring, and solar energy sectors.

Photodetectors are essential components in various technologies, converting light into electrical signals for use in cameras, medical imaging systems, environmental sensors, and communication devices. The research team, led by Professor P.K. Giri from the Department of Physics, collaborated with scholars Debabrata Sahu, Subhankar Debnath, and Sirsendu Ghosal. Their findings were published in the prestigious journal ACS Applied Materials & Interfaces.


Perovskites, known for their superior light absorption, are ideal for photodetectors and other light-harvesting technologies. The IIT Guwahati team employed formamidinium perovskite, a material recognized for its improved stability and efficiency in converting light into electrical signals. However, achieving high performance while maintaining cost-effectiveness posed a challenge, which the team successfully overcame through innovative design.

To enhance the device’s sensitivity, the researchers integrated 2D-printed plasmonic nanoparticles made of silver. These nanoparticles use localized surface plasmon resonance (LSPR) to focus light onto the perovskite layer, significantly improving light absorption and detection efficiency. A microprinting technique was employed to precisely arrange the nanoparticles, ensuring that the manufacturing process remains scalable and cost-efficient.

“Our aim was to design a photodetector that not only performs exceptionally well but is also affordable and durable,” said Professor P.K. Giri. “By incorporating plasmonic nanoparticles into the perovskite layer, we have achieved a device that offers both high sensitivity and economic viability for practical use.”

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This photodetector innovation has the potential to revolutionize medical imaging, making diagnostic tools more precise and accessible. In addition, it could enhance environmental monitoring by improving sensor accuracy and boost the efficiency of solar energy systems, contributing to sustainable energy solutions. The device’s ability to maintain stability under normal environmental conditions ensures its durability for real-world applications across multiple industries.

The development by IIT Guwahati opens doors for a range of practical applications, addressing global challenges through affordable and scalable technology.


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