Indian Scientists Develop Lead-Free Perovskite Photodetector for Sustainable Solar Energy
The innovation involves the partial substitution of lead by magnesium, offering a non-toxic and eco-friendly alternative for solar energy generation.
December 29, 2023. By Abha Rustagi
The innovation involves the partial substitution of lead by magnesium, offering a non-toxic and eco-friendly alternative for solar energy generation.
The organic-inorganic halide perovskite, known as Methyl Ammonium Lead Iodide (MAPbI3), has been a focal point in optoelectronic research, demonstrating potential applications in solar cells, LEDs, and photodetectors. However, the presence of toxic lead (Pb2+) has posed significant health and environmental concerns.
The research team, affiliated with the Department of Science and Technology (DST), addressed these challenges by turning to magnesium (Mg), an alkaline earth metal known for its non-toxic nature and abundance. Through a one-step anti-solvent approach, they synthesized the MAPbxMg1-xCl2I perovskite, achieving a tetragonal perovskite phase with the desired properties.
The newly developed photodetector features a simplified architecture (FTO/TiO2/Perovskite/Carbon), eliminating the need for an expensive metal cathode like gold, resulting in an economic and robust configuration.
The optimized MAPb0.5Mg0.5Cl2I perovskite demonstrated outstanding responsivity of 153.74 mA/W, a high detectivity of 6.5 x 10^10 Jones, and a rapid response/recovery time of 411 ms/50 ms at ZERO bias. This breakthrough marks a significant stride toward replacing toxic lead in perovskite optoelectronic devices.
This research offers a promising alternative for photodetectors and other optoelectronic devices, contributing to a greener future in optoelectronics.
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