Growth and characterization of pure and KDP doped 2-Benzamidoacetic acid organic semiconductor materials for high refractive index devices

• Published in: Optical materials 2024-03, Vol.149, p.114913, Article 114913
• Main Authors: Kulshrestha, Shobha, Kumari, Meena, Shrivastava, A.K.
• Format: Article
• Language: English
• Subjects: Crystal growth; Powder XRD; SEM; Single crystal XRD; Vickers microhardness
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2024.114913

2-Benzamidoacetic acid is a conjugate aromatic organic amino acid compound. These conjugated bonds attract attention due to their high nonlinear optical properties, which are applicable in various optical applications. Single crystals of pure and potassium diahydrogen phosphate (KDP)-doped 2-Benzamidoacetic acid are grown by the slow evaporation method at room temperature. These crystals are confined in size, have a limpid appearance, and are non-hygroscopic. A UV–visible study shows the transparent nature of grown crystals in the visible region (400–800 nm). The transparent nature of crystal shows less absorption of light in the visible region. Absorption coefficient (α), refractive index (n), optical conductivity (op), polarisability (P), and susceptibility (op)—all these optical data support the experimental data. The lower cut-off wavelengths are 305 and 350 nm for grown crystals of pure and KDP-doped 2-Benzamidoacetic acid. The optical band gap indicates that doping of KDP in 2-Benzamidoacetic acid crystals turns them into organic or semiorganic crystals. The range of the optical band gap shows that crystal is useful in optoelectronic devices. For the NLO property, a second harmonic generation test was performed. This study shows that grown crystals are recommended for the fabrication of green light emission devices. The various functional groups of the grown crystal were designated using Fourier transform infrared (FTIR). The crystal dimensions of the grown crystal of pure and doped 2-Benzamidoacetic acid were confirmed by single crystal X-ray diffraction (SXRD), and the crystalline nature of the crystal was confirmed and hkl planes were indexed by powder X-ray diffraction (PXRD) analysis. A scanning electron microscope (SEM) shows good surface morphology in grown crystals. The Vickers hardness test shows good mechanical strength for the manufacturing of devices. •This research work is based on growth of organic nonlinear single crystals and their optical applications.•UV study reveals that materials have a wide window in the entire visible region. The refractive index is calculated to be 2.73. This range of refractive index is applicable in CMOS and other photonic devices.•Second harmonic generation (SHG) study proves that material is applicable for green laser light devices.•SXRD and PXRD data reveals that material is perfectly crystalline in nature. Latticeparameters, Particle size, less lattice strain shows crystals are good for applications.•For