A facile one pot synthesis of novel pure and Cd doped PbI2 nanostructures for electro-optic and radiation detection applications

Abstract

Herein, we report the one pot synthesis of pure and Cd2+ (= 0.97 Å) doped PbI2 (Pb2+ = 0.133 Å) nanostructures by simple chemical route at room temperature. The structural phase confirmation was done by X-ray diffraction and FT-Raman analyses. Using X-ray data various parameters such as lattice constants, crystallinity, crystallite size, lattice strain, dislocation density etc. were determined. The calculated crystallite size using Scherer's rule was found to be in the range of 50–56 nm. The morphology of synthesized product was studied by SEM that confirms the formation of single crystalline nanosheets (NSs) and nanoplates (NPs). PL spectra shows an noticeable enhancement in emission intensity with Cd doping and a blue and green emission band is observed at ∼470 and 525 nm with more or less shifting, which makes it applicable for blue and green LEDs devices. The enhancement in dielectric constant was observed due to doping. The total ac electrical conductivity of PbI2 was found to be enriched due to doping. The radiation activity in terms of linear absorption coefficient was tested using Americium (214Am) radioactive sources and found to be enhanced by Cd2+ doping. The prepared nanostructures are found to be highly sensitive to 214Am 59.5 KeV γ-ray. The simple synthesis route with enhanced properties of Cd2+ doped PbI2 will be key for future electro-optical and radiation detection applications.