In this work, TiO₂ and Ag doped TiO₂ nanoparticles with different concentrations of Ag (0.01 M, 0.03 M, and 0.05 M) were synthesized by facile green synthesis method using grapefruit extract as solvent/reducing agent. X-ray diffraction patterns and the Raman spectra of the prepared material exhibited anatase phase with tetragonal crystal structure. No specific peaks corresponding to Ag nanoparticles were observed, which further confirms the Ag doping in TiO₂. FESEM images reveal the nanorods and spherical shaped morphology of the TiO₂ and Ag-TiO₂ nanoparticles respectively. UV–Visible spectrum illustrates that absorption edge was shifted towards the visible region and from the photoluminescence spectroscopy quench in the fluorescence intensity was observed for the Ag doped TiO₂ samples compared to bare TiO₂ sample. Using the prepared TiO₂ nanoparticles and Ag doped TiO₂ nanoparticles, two different dyes such as natural dye and commercial dye (N719) as sensitizers, photo anodes were prepared. DSSCs were constructed using the prepared photoanodes, and its performance was examined. The silver doped TiO₂ nanoparticle showed an efficiency η of 2.66% for MK dye and 6.42% for N719 dye with 0.03 M of silver doping. Improvement of the visible light absorption and the decrease in photogenerated electron hole pair recombination, increment of the oxygen vacancy in the Ag-TiO₂ are found to be the key factors for the enhancement of the electrical properties of the DSSCs.

在这项工作中，以葡萄柚提取物为溶剂/还原剂，通过简便的绿色合成法合成了不同浓度Ag（0.01 M、0.03 M和0.05 M）的TiO ₂和Ag掺杂的TiO _{2纳米颗粒。}所制备材料的X射线衍射图和拉曼光谱显示具有四方晶体结构的锐钛矿相。没有观察到对应于Ag纳米颗粒的特定峰，这进一步证实了Ag掺杂在TiO ₂中。_{FESEM 图像揭示了 TiO 2}和 Ag-TiO ₂的纳米棒和球形形态分别为纳米粒子。紫外-可见光谱表明，与裸露的 TiO 2 样品相比，Ag 掺杂的 TiO 2 样品的吸收边缘向可见光区域移动，并且从光致发光光谱中观察到荧光_强度的_猝灭。使用制备的TiO ₂纳米颗粒和Ag 掺杂的TiO ₂纳米颗粒，天然染料和商业染料（N719）两种不同的染料作为敏化剂，制备光阳极。使用制备的光阳极构建 DSSC，并检查其性能。银掺杂的 TiO ₂纳米颗粒对 MK 染料的效率 η 为 2.66%，而对具有 0.03 M 银掺杂的 N719 染料的效率 η 为 6.42%。可见光吸收的改善和光生电子空穴对复合的减少、Ag-TiO ₂中氧空位的增加是提高DSSCs电性能的关键因素。