Abstract In the present study, we synthesized TiO2 nanofibers (NFs) by electrospinning technique and they were subject to solvosonication process using glycerol as a pore forming agent to produce porous TiO2 NFs. The prepared porous TiO2 NFs are seen to improve the light harvesting capability as a result of enhanced light scattering inside the TiO2 NFs and offer a high surface area for maximum adsorption of pre-synthesized CdSe (~4 nm) QDs. The FE-SEM and BET analysis were performed to confirm the surface texture and surface area of porous TiO2 NFs, respectively. Finally, QDSSCs were fabricated using these porous TiO2 NFs sensitized with CdSe QDs as the photoanode, Cu2S nanoparticles as the counter electrode and polysulfide redox couple (S2−/Sx2−) as the electrolyte. The porous TiO2 NFs obtained by solvosonication at the time duration of 90 min has enhanced photocurrent density (Jsc) of 9.21 mA/cm2 with high power conversion efficiency (η) of 2.15% than the conventional TiO2 NFs (η ≈ 1.50%).

中文翻译：

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溶剂超声法制备多孔TiO 2 纳米纤维用于高性能量子点敏化太阳能电池

摘要 在本研究中，我们通过静电纺丝技术合成了 TiO2 纳米纤维 (NFs)，并使用甘油作为成孔剂对它们进行溶剂超声处理以生产多孔 TiO2 NFs。由于 TiO2 NF 内部的光散射增强，因此制备的多孔 TiO2 NF 可以提高光捕获能力，并提供高表面积以最大程度地吸附预合成的 CdSe（~4 nm）QD。进行 FE-SEM 和 BET 分析以分别确认多孔 TiO2 NFs 的表面纹理和表面积。最后，使用这些用 CdSe QD 敏化的多孔 TiO2 NF 作为光阳极、Cu2S 纳米颗粒作为对电极和多硫化物氧化还原对 (S2-/Sx2-) 作为电解质制造 QDSSC。