Abstract Single crystals of pure and xylenol orange (XO; C 31 H 32 N 2 O 13 S) dye doped (0.01, 0.05 and 0.1 mol%) ammonium dihydrogen phosphate (ADP; NH 4 H 2 PO 4 ) were grown by slow evaporation method with the vision to improve the properties of pure ammonium dihydrogen phosphate crystal. The theoretical morphology of the grown crystals was drawn using Bravais–Friedel–Donnay–Harker (BFDH) law. The selective nature of xylenol orange dye to selectively stain the particular growth sectors of ADP crystal was studied. The structural analysis of as grown crystals was carried out using powder XRD study. The identification of the functional groups present in the ADP material was done using Fourier transform infrared (FTIR) spectroscopy. The linear optical study on pure and dye doped crystals was carried out using UV–vis–NIR spectroscopy. The optical band gap, extinction coefficient, refractive index and optical conductivity were calculated using the transmittance spectra for all the samples. In photoluminescence studies, the blue emission intensity got quenched and an orange emission at 597 nm was seen as a result of XO doping. The thermal stability and decomposition temperature of ADP crystal were found to decrease as an effect of dye doping. The piezoelectric charge coefficient, SHG conversion efficiency, mechanical strength and wettability were also enhanced as a result of XO dye doping.

中文翻译：

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用于 NLO 应用的二甲苯酚橙掺杂 ADP 单晶的光学、压电和机械性能

摘要 通过缓慢蒸发生长纯二甲酚橙 (XO; C 31 H 32 N 2 O 13 S) 染料掺杂（0.01、0.05 和 0.1 mol%）磷酸二氢铵（ADP; NH 4 H 2 PO 4 ）的单晶以改善纯磷酸二氢铵晶体性能为目的的方法。使用 Bravais-Friedel-Donnay-Harker (BFDH) 定律绘制生长晶体的理论形态。研究了二甲酚橙染料选择性染色 ADP 晶体的特定生长扇区的选择性。使用粉末 XRD 研究进行生长晶体的结构分析。使用傅里叶变换红外 (FTIR) 光谱对 ADP 材料中存在的官能团进行鉴定。使用紫外-可见-近红外光谱对纯晶体和染料掺杂晶体进行线性光学研究。使用所有样品的透射光谱计算光学带隙、消光系数、折射率和光导率。在光致发光研究中，由于 XO 掺杂，蓝色发射强度被淬灭，并且在 597 nm 处看到橙色发射。发现 ADP 晶体的热稳定性和分解温度随着染料掺杂的影响而降低。由于 XO 染料掺杂，压电电荷系数、SHG 转换效率、机械强度和润湿性也得到了提高。发现 ADP 晶体的热稳定性和分解温度随着染料掺杂的影响而降低。由于 XO 染料掺杂，压电电荷系数、SHG 转换效率、机械强度和润湿性也得到了提高。发现 ADP 晶体的热稳定性和分解温度随着染料掺杂的影响而降低。由于 XO 染料掺杂，压电电荷系数、SHG 转换效率、机械强度和润湿性也得到了提高。