Researchers at IIT Indore are developing a new kind of smart glass that could change the way we use windows in our homes and offices. Under the guidance of Prof. Suman Mukhopadhyay from the Department of Chemistry and Prof. Rajesh Kumar from the Department of Physics, this innovative work is being carried out under the Translational Research Fellowship (TRF) scheme by researcher Dr. Sayantan Sarkar from the Department of Chemistry. Viologen-based polymer behind the innovation The project focuses on creating an electronic curtain glass that can control how much light and heat passes through it by applying a small electric current. The key material driving this technology is a newly developed viologen-based porous organic polymer (POP), designed to be low-cost, long-lasting, and scalable for mass production. Quick response, efficient energy control These POPs are engineered to respond quickly to electricity, changing color and transparency in real time. This allows the smart glass to block sunlight and heat during hot conditions or let in light during cooler weather, significantly cutting down the need for air conditioning and artificial lighting. From lab to real-world testing Initial lab tests have shown promising results. The team applies the POP coating onto glass surfaces using spray-coating and dip-coating techniques to ensure a smooth, durable finish. The coated layer is placed between two transparent electrodes, ultra-thin, nearly invisible metal films that activate the material on command. Currently, the researchers are testing small glass samples to evaluate how quickly they respond, how clear they appear, and how well they perform under sunlight, heat, and daily wear. Focus on industrial integration What sets this project apart is its commitment to moving beyond laboratory success. The IIT Indore team is working with industry partners to ensure the smart glass can be manufactured using existing factory setups, making it viable for large-scale production without the need for major technological shifts. Unlike conventional curtains or tint films, this glass dynamically adapts to environmental conditions, offering privacy, comfort, and energy savings in a sleek, modern format. Leadership speaks: a vision for impact Prof. Suhas S. Joshi, Director of IIT Indore, emphasized the institute’s mission to drive societal change through research: At IIT Indore, we are dedicated to transforming academic research into technologies that benefit society. The smart glass project is a fine example of interdisciplinary collaboration aimed at achieving sustainability and national progress. Prof. Mukhopadhyay highlighted the power of fundamental science: This technology is a perfect example of how fundamental chemistry can lead to smart and scalable engineering solutions. The use of viologen-based polymers allows for quick and reliable color change, which can significantly impact how we design energy-efficient buildings. Prof. Rajesh Kumar added, By integrating material science and applied physics, we’ve created a responsive glass solution that not only works in the lab but is also fit for industrial use. This has the potential to replace traditional window systems in the near future.
