Optical and spectroscopic studies of potassium p-nitrophenolate dihydrate crystal for frequency doubling applications

Non centrosymmetric potassium p-nitrophenolate dihydrate single crystals have been grown by employing the technique of slow solvent evaporation from aqueous solution by slightly adjusting the pH and growth temperature. The grown crystals have been identified from single crystal XRD analysis, FTIR and FT Raman spectroscopic techniques. The high resolution X-ray diffraction experiments substantiate good quality of the title material. Between 510 and 2000 nm, the material is observed to be nearly transparent allowing it to be explored for potential use in device fabrication. In addition, the photoluminescence spectrum of the grown crystal at room temperature shows a stable broad violet-blue emission around the 383–550 nm wavelengths with the maximum centered at 436 nm. Owing to its excellent non linear figure of merit and strong PL emission, the title crystal can have technological applications in opto-electronic devices.

Good optical quality single crystals of NPK·2H2O have been grown by slow solvent evaporation from its aqueous solution. Single crystal XRD analysis, FTIR and FT Raman spectroscopic studies confirm the identity of the title material. High resolution XRD measurements substantiate reasonably good quality of the grown single crystal. Between 510 and 2000 nm, the material is observed to be nearly transparent making the material suitable for non linear optical applications. The band gap of the material was found to be 5.1 eV from UV absorption data. Although the investigation of the properties of NPK·2H2O is still in progress, NPK·2H2O crystal can be expected to have potential applications in opto-electronic devices in view of its excellent non linear figure of merit and strong PL emission.Figure optionsDownload as PowerPoint slideHighlights
► The title crystal has been grown by slow solvent evaporation from aqueous solution.
► The HRXRD experiments substantiate good quality of the material.
► PL spectrum shows a stable broad violet-blue emission.