Growth, photoluminescence, thermal and mechanical behaviour of Ethyltriphenylphosphonium bromide dihydrate crystal

•ETPB bulk single crystal was grown by slow evaporation solution growth method.•Ethyltriphenylphosphonium bromide dihydrate was confirmed by single crystal XRD.•FT-IR, FT-Raman, thermal and mechanical studies were carried out.•Photoluminescence studies to explore its efficacy towards device fabrication.•The second harmonic generation was tested by Kurtz Perry powder technique.

Single crystal of Ethyltriphenylphosphonium bromide dihydrate (ETPB) was grown by slow evaporation solution growth technique. The grown crystal was confirmed by single crystal X-ray diffraction. The functional groups and vibrational frequencies were identified using FT-IR and FT-Raman spectral analyses. Optical properties were studied by UV–Visible and photoluminescence spectroscopic techniques to explore its efficacy towards device fabrication. Thermal characteristics of ETPB were studied using the TGA/DTA and DSC response curves. The mechanical behaviour of the grown crystal was studied using Vicker’s microhardness tester and the work hardening coefficient was evaluated. The second harmonic generation of the title compound was tested by Kurtz–Perry powder technique.

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