Good quality single crystals of L-leucine hydrobromide (LEHBr) of size 10 × 2 × 2 mm3 were grown by slow evaporation solution growth technique at room temperature. The crystal system and the lattice parameters were analyzed by single crystal X-ray diffraction studies. From the thermo gravimetric/differential thermal analysis (TG/DTA), the LEHBr was found to be thermally stable up to 213 °C. The SHG efficiency of the grown crystal was found to be 4 times higher than that of KDP crystal. The dielectric properties of LEHBr from 308 to 368 K were investigated by the impedance analysis. The temperature dependences of ac & dc conductivities of LEHBr were investigated Photoconductivity studies of LEHBr divulged its negative photoconducting nature.
