Comments on "influence of procion red dye doping on the structural, dielectric and optical properties of diglycine phthalic acid single crystals for nonlinear optical applications"

Abstract

The title paper (J Mater Sci: Mater Electron 35 1265 (2024)) reports on the growth, characterization, properties of novel organic single crystals of "diglycine phthalic acid (DGP)" and Procion Red doped "diglycine phthalic acid (RDGP)". Many points of criticism, concerning the crystal growth and experimental data are highlighted in this communication to prove that the so-called DGP and RGDP crystals are improperly characterized materials. DGP and RGDP crystals are examples, which demonstrate that characterization of new materials based on unit cell data leads to erroneous conclusions.