Crystal growth and characterization of organic single crystals for nonlinear Optical and scintillation applications

Abstract

Crystal growth technology has been one of the utmost charming areas of research. Crystals are the unacknowledged pillars of modern science and technology in the world. In recent years, enormous advances have been made in producing crystals for the scientific area. The growth of high quality single crystals remains a challenging endeavour of materials science. The present thesis is categorized into six chapters. newlineThe first chapter initiates with an introduction to the various crystal growth methods and density functional theory. In addition, overview of organic scintillator materials and various characterizations related to the optical and scintillation applications are deliberated. Second chapter discusses the 1, 3, 5 - triphenylbenzene (TPB) single crystal growth and its characterization. TPB single crystal is grown using the slow evaporation solution growth method. The lattice parameters of the grown crystal were confirmed using single-crystal X-ray diffraction measurement. It shows that TPB single-crystal belongs to the orthorhombic system. UV-Vis-NIR analysis reveals that grown crystal has good optical transmittance in the entire visible region. The melting and decomposition points of the grown crystal are 175ºC and 340ºC, respectively. The grown TPB crystal was subjected to the FT-IR and Raman analysis to confirm the various functional groups and compared with the calculated vibrational frequencies. Intermolecular interactions of the TPB crystal have been executed through Hirshfeld surface analysis. newline newline