Development of porous TiO2 nanofibers by solvosonication process for high performance quantum dot sensitized solar cell
Development of porous TiO2 nanofibers by solvosonication process for high performance quantum dot sensitized solar cell
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DOI：
10.1016/j.solmat.2018.01.042
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发表时间：
2018-06
影响因子：
6.9
通讯作者：
Nisha Singh;Z. Salam;A. Subasri;N. Sivasankar;A. Subramania
中科院分区：
文献类型：
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作者：
Nisha Singh;Z. Salam;A. Subasri;N. Sivasankar;A. Subramania
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进行溶剂超声处理以生产多孔TiO2NFs。由于 TiO2NF 内部光散射增强，所制备的多孔 TiO2NF 提高了光捕获能力，并提供了高表面积，可以最大程度地吸附预合成的 CdSe (~4nm) QD。 FE-SEM 和 BET 分析分别用于确认多孔 TiO2NF 的表面纹理和表面积。最后，使用这些以 CdSe QD 敏化的多孔 TiO2NF 作为光阳极，Cu2S 纳米粒子作为对电极，多硫化物氧化还原电对 (S2−/Sx2−) 作为电解质来制造 QDSSC。通过溶剂超声处理90min的时间获得的多孔TiO2NFs，其光电流密度（Jsc）提高到9.21mA/cm2，功率转换效率（η）比传统TiO2NFs（η≈1.50%）高2.15%。
In the present study, we synthesized TiO2nanofibers (NFs) by electrospinning technique and they were subject to solvosonication process using glycerol as a pore forming agent to produce porous TiO2NFs. The prepared porous TiO2NFs are seen to improve the light harvesting capability as a result of enhanced light scattering inside the TiO2NFs 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 TiO2NFs, respectively. Finally, QDSSCs were fabricated using these porous TiO2NFs sensitized with CdSe QDs as the photoanode, Cu2S nanoparticles as the counter electrode and polysulfide redox couple (S2−/Sx2−) as the electrolyte. The porous TiO2NFs obtained by solvosonication at the time duration of 90 min has enhanced photocurrent density (Jsc) of 9.21 mA/cm2with high power conversion efficiency (η) of 2.15% than the conventional TiO2NFs (η ≈ 1.50%).