A single-layer N719 sensitized nanocrystalline TiO₂ films have been successfully deposited on FTO-coated glass substrates using the screen-printing technique with four different thicknesses (10, 12, 14 and 18 µm) and used as simple and low cost photoanodes for dye-sensitized solar cells (DSSCs). The thickness was controlled by adjusting the distance between the screen-printing mesh and the FTO-coated substrate using the two height control bolts. The films were deposited using one-time screen-printing method. So that the multiple screen-printing and annealing cycles can be reduced. Furthermore, the cell fabrication time was reduced as well as the problem of recombination at the interfacial layers between the TiO₂ films was avoided. The thickness of the TiO₂ films was measured by the surface profilometer. The prepared photoanode samples were characterized using FESEM, EDX, AFM, and UV–vis-NIR spectroscopies. The ruthenium dye soaking time was optimized at 48 h. The photovoltaic parameters such as short circuit current density (I_sc), open-circuit voltage (V_oc), fill factor (FF) and power conversion efficiency (η) were measured for fabricated cells at room temperature under one sunlight 100 mW/cm² illumination using the solar simulator. The effect of TiO₂ film thickness on the fabricated DSSCs performance parameters was studied. DSSC devices with average thickness 12µm achieved the highest conversion efficiency of 5.13 % with J_sc = 12.12 mA/cm², and V_oc = 0.69 V. The obtained results revealed that the amount of the adsorbed dye increases with the increase in the TiO₂ film thickness and thus improve photogenerated current. However, exceeding the optimum photoanode thickness results in decline in the photogenerated current and the overall efficiency due to back electrons recombination and the lower photoanode transmittance.

已使用丝网印刷技术以四种不同厚度（10、12、14和18 µm）成功将单层N719敏化纳米晶TiO ₂薄膜沉积在FTO涂层的玻璃基板上，并用作染料的简单且低成本的光阳极敏化太阳能电池（DSSC）。通过使用两个高度控制螺栓调节丝网印刷丝网和FTO涂层基材之间的距离来控制厚度。使用一次性丝网印刷方法沉积膜。这样可以减少多个丝网印刷和退火周期。此外，减少了电池制造时间，并且避免了在TiO ₂膜之间的界面层处的复合问题。TiO ₂的厚度膜通过表面轮廓仪测量。使用FESEM，EDX，AFM和UV-vis-NIR光谱仪对制备的光阳极样品进行表征。钌染料的浸泡时间最优化为48 h。在室温下在一个太阳光下100 mW / cm的条件下测量光伏电池的光伏参数，例如短路电流密度（I _sc），开路电压（V _oc），填充系数（FF）和功率转换效率（η）。²使用太阳能模拟器照明。研究了TiO ₂膜厚度对所制备的DSSCs性能参数的影响。在J _sc = 12.12 mA / cm ^{2的情况下}，平均厚度为12µm的DSSC器件实现了5.13％的最高转换效率并且，V _oc＝ 0.69V。获得的结果表明，随着TiO ₂膜厚度的增加，染料的吸附量增加，从而改善了光生电流。然而，由于背电子的复合和较低的光阳极透射率，超过最佳的光阳极厚度会导致光生电流和总效率的下降。