This work reports on the effect of zinc(II)-benzene-1,3,5-tricarboxylate metal organic frameworks (Zn-BTC MOFs) towards enhancing the power conversion efficiency of titanium dioxide (TiO₂) based dye-sensitized solar cells (DSSCs). Zn-BTC MOFs and TiO₂ nanoparticles were synthesized via a modified hydrothermal method. This was followed by the addition of an extrinsic mixture of TiO₂ powder and MOFs to form TiO₂-Zn-BTC MOF(2%), TiO₂-Zn-BTC MOF(4%) and TiO₂-Zn-BTC MOF(6%) nanocomposites with varying concentrations. The structure, morphology, optical properties and thermal stability of the MOF powders were subsequently evaluated. XRD analysis demonstrated that the incorporation of MOFs into TiO₂ decreases the crystallinity of TiO₂ due to the poor crystalline structure of MOFs. The presence of the Ti-C bond and the induced redshift of the E₁g peak suggesting the migration of electrons between TiO₂ and MOFs was confirmed by FTIR and Raman spectroscopy, respectively. Microscopic studies showed the formation of irregularly shaped nanoparticles with a size range of 5–40 nm. Additionally, the BET surface area improved with an increase in Zn-BTC loadings, leading to the uniform dispersion of TiO₂ nanoparticles in the nanocomposites. The optical properties of the nanocomposites were enhanced by the incorporation of Zn-BTC MOFs resulting to low band gap values. The TiO₂-Zn-BTC MOF(2%) exhibited a lower band gap of 2.9 eV in comparison to TiO₂-Zn-BTC MOF(4%) with a band gap of 3.1 eV and TiO₂-Zn-BTC MOF(6%) which also had a band gap of 3.1 eV. Hence, TiO₂-Zn-BTC MOF(2%) exhibited reduced recombination rates of the electron-hole pairs and increased photoactivity as confirmed by the photoluminescence (PL) spectroscopy data, as well as reduced charge-transfer kinetics shown by electrochemical impedance results. The I–V results showed that TiO₂-Zn-BTC MOF(2%) has a strong ability to act as an effective electron transporter which significantly enhanced the photoefficiency of TiO₂ thus leading to better photoanodes for DSSCs.

这项工作报告了锌（II）-苯-1,3,5-三羧酸金属有机骨架（Zn-BTC MOF）对提高基于二氧化钛（TiO ₂）的染料敏化太阳能电池的功率转换效率的作用（ DSSC）。通过改进的水热法合成了Zn-BTC MOF和TiO ₂纳米粒子。然后添加TiO ₂粉末和MOF的外在混合物，形成TiO ₂ -Zn-BTC MOF（2％），TiO ₂ -Zn-BTC MOF（4％）和TiO ₂浓度不同的-Zn-BTC MOF（6％）纳米复合材料。随后评估了MOF粉末的结构，形态，光学性质和热稳定性。XRD分析表明，由于MOF的不良晶体结构，将MOF掺入TiO ₂降低了TiO ₂的结晶度。Ti-C键的存在和E ₁ g峰的诱导红移表明电子在TiO ₂之间迁移FTIR和拉曼光谱分别证实了MOF和MOF。显微镜研究表明，形成了尺寸范围为5-40 nm的不规则形状的纳米颗粒。另外，BET表面积随Zn-BTC负载量的增加而改善，从而导致TiO ₂纳米颗粒在纳米复合物中的均匀分散。通过掺入Zn-BTC MOF增强了纳米复合材料的光学性能，从而降低了带隙值。TiO ₂ -Zn-BTC MOF（2％）的带隙低于2.9 eV，而TiO ₂ -Zn-BTC MOF（4％）的带隙为3.1 eV和TiO ₂ -Zn-BTC MOF（2％）较低。6％），其带隙也为3.1 eV。因此，TiO ₂-Zn-BTC MOF（2％）表现出的电子-空穴对重组率降低，光活性增强，如通过光致发光（PL）光谱数据所证实，以及电化学阻抗结果所示的降低的电荷转移动力学。I–V结果表明，TiO ₂ -Zn-BTC MOF（2％）具有有效的电子转运体的强大功能，可显着提高TiO ₂的光效率，从而为DSSC提供更好的光阳极。