MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202611100499 A) filed by Madan Mohan Malaviya University Of Technology on August 19, 2026, for Lead-Free Bsm-Type Rare-Earth Silver Fluoro-Halide Semiconductor Compounds.
Inventors include Prof. Brijesh Kumar Pandey; Saurav Mishra; Priyanka Singh; and Dr. Abhay Prakash Srivastava.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: The present invention relates to a family of lead-free quaternary rare-earth silver fluoro-halide semiconductor compounds, designated herein as the BKS-type family. The disclosed compounds are represented by the general formula RE?Ag_bBr_cF_d, wherein RE comprises scandium, yttrium, or one or more lanthanide elements, and crystallize in the PbFCl (matlockite) crystal structure or ordered derivatives thereof. The compounds exhibit composition-dependent direct electronic band gaps ranging from approximately 2.81 eV to 3.36 eV, enabling continuous optical tuning from the ultraviolet region to the visible spectral edge. The materials are identified and characterized using first-principles Density Functional Theory (DFT) calculations incorporating PBE structural optimization, HSE06 hybrid-functional electronic structure analysis, and thermodynamic stability evaluation through energy-above-convex-hull calculations. The invention further provides representative preparation methods and semiconductor materials suitable for ultraviolet photodetectors, photovoltaic devices, scintillators, luminescent host materials, and other lead-free optoelectronic applications.
Disclaimer: Curated by HT Syndication.
