Scientists at the Institute of Nano Science and Technology (INST), Mohali, an autonomous institute of the Department of Science and Technology (DST) in India, have made a significant discovery: a self-assembling bacterial shell protein that exhibits photoactive semiconductor properties. This natural protein is capable of absorbing ultraviolet (UV) light and generating an electrical current without the need for added dyes, metals, or external power, functioning as a light-driven, scaffold-free semiconductor. The research, led by Dr. Sharmistha Sinha and her team including Ms. Silky Bedi and Mr. S. M. Rose, found that the proteins arrange themselves into thin, sheet-like structures. When exposed to UV light, tyrosine, a natural amino acid within the proteins, releases electrons, causing tiny electrical charges to move across the protein surface and produce an electrical signal. This inherent ability relies on the protein's internal order and does not require synthetic additives or high-temperature manufacturing. The discovery holds immense potential for developing safe, environmentally friendly electronics, offering a sustainable alternative to traditional rigid, high-energy processed silicon-based semiconductors that contribute to electronic waste. The material's flexibility and biocompatibility open doors for diverse real-world applications. These include wearable health monitors, skin-safe UV-detection patches, and implantable medical sensors that can operate safely within the human body. Additionally, it could be utilized in temporary or disposable environmental sensors, such as pollution detectors, that naturally degrade after use, minimizing ecological impact. The study, published in the journal *Chemical Science of the Royal Society of Chemistry*, represents a promising step towards bio-inspired electronics, aiming for a new generation of functional, efficient, sustainable, and safe electronic technologies. This development from India highlights the country's contribution to advanced materials science and nanotechnology.