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Novel Eco-Friendly Photodetector
Overview:
Indian researchers at ARCI, Hyderabad, in collaboration with IIT Hyderabad, develop a novel lead-free, eco-friendly photodetector as an alternative to toxic lead-based photodetectors. The work is under the nodal authority of the Department of Science and Technology (DST), Government of India, and is relevant due to its sustainable, low-cost fabrication and self-powered operation.
Novel Lead-Free Eco-Friendly Photodetector (ARCI–IIT Hyderabad):
| Dimension | Key Details |
|---|---|
| Definition | Photodetectors are sensors that can convert the photon energy of light into an electrical signal. |
| Developed by | International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, in collaboration with IIT Hyderabad. |
| Nodal Authority | Department of Science and Technology (DST), Government of India. |
| Material Used | Based on the double perovskite Cs2AgBiBr6 that delivers strong and stable performance. |
| Electrodes | Low-cost carbon electrodes. |
| Design and Fabrication Method | Hole Transport Material (HTM)-free design, fabricated at room temperature via a one-step coating method. |
| Key Features | Provides for lead-free and environmentally friendly operation; exhibits strong response to visible light; authorises self-powered operation without external voltage due to efficient charge separation; retains >90% performance after 60 days. |
| Fabrication Advantages | Mandates one-step coating at room temperature under normal conditions, reducing cost and complexity; works without protective layers, so no expensive vacuum or glovebox is required. |
| Applications | Applies to consumer electronics (cameras, smart wearables), industrial monitoring, security systems, and biomedical imaging. |
| Benefits | Provides for reduced toxicity associated with lead-based photodetectors; comprises low-cost and energy-efficient operation due to self-powered operation; durable under real-world environmental conditions. |
| Significance | Supports India’s goals of green manufacturing, sustainable materials, and self-reliance in next-generation electronics. |