Evaluation of the optical, photoluminescence, and thermal characteristics of Barium thiourea chloride (BTCL), a metal–organic crystal for photonic applications

Author:

Albert Helen Merina1ORCID,Shibu Smitha2ORCID,Gupta Abha3ORCID,Ganganagunta Srinivas3ORCID,Patnaik D. Neelima4ORCID,Rajagopalan N. R.5ORCID,Kumar Nellore Manoj6ORCID

Affiliation:

1. Department of Physics, Sathyabama Institute of Science and Technology, Chennai, India

2. Department of Chemistry, University of Technology and Applied Sciences-Ibra, College of Engineering — Mechanical Ibra, Sultanate of Oman

3. Department of Physics, University of Technology and Applied Sciences-Ibra, College of Engineering — Mechanical Ibra, Sultanate of Oman

4. Department of H&S (Physics), CMR College of Engineering & Technology, Medchal, Hyderabad, Telangana, India

5. Department of Chemistry, St. Joseph’s College of Engineering, Chennai, Tamil Nadu, India

6. Department of Mathematics, Saveetha, School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, Tamil Nadu, India

Abstract

The development of crystal fabrication and characterization approaches makes it possible to study novel materials with enhanced linear and nonlinear optical properties. The solution growth method was adopted in the present investigation to create Barium thiourea chloride (BTCL), a metal–organic single crystal. Structural, optical, and thermal characteristics of the BTCL crystals were evaluated by XRD analysis, Fourier transform infrared spectroscopy, UV–Vis spectrometry, photoluminescence, SHG, and thermal analyses. The XRD method was applied to investigate the structural characteristics of the BTCL, which is related to the monoclinic structure. The FT-IR spectral investigation was conducted to observe the vibrational modes in BTCL. The optical measurements showed the transmittance in the near-UV and visible spectrums. Optical characteristics include bandgap, refractive index, extinction coefficient, optical, and electrical conductivities, and dielectric constants were obtained. The PL curve showed two notable emission peaks at 482.5[Formula: see text]nm and 491[Formula: see text]nm. The ability to generate second harmonics was investigated using the Kurtz and Perry method, and the SHG was more than 1.79 times the KDP sample. The thermal behavior of the BTCL was evaluated by TGA/DTA measurements. The Coats–Redfern relation was used to estimate the activation energy of the thermal system and the value was determined to be 9.48[Formula: see text]KJ/mol. The findings indicate that the BTCL crystals possess excellent optical transparency, higher SHG potency, and good thermal stability, which are suitable for use in photonic structures.

Publisher

World Scientific Pub Co Pte Ltd

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