Efficient electron transport and minimizing recombination losses are crucial for optimizing DSSC performance, necessitating strategies to improve electron diffusion and reduce charge recombination. Two new eco-friendly polyimides based on -type polyoxometalates namely Tris@ZnPOM, and Tris@NiPOM, one with the Zn-containing Anderson-type POM(ADP), and the other with the Ni-containing Anderson-type POM, respectively have been synthesized and characterized by FT-IR, UV–vis. spectral analysis, TGA,H NMR, fluorescence and cyclic voltametric analysis. The fluorescence quenching in Tris@ZnPOM, and Tris@NiPOM was observed as98% and 99.7% as compared to Tris@anhydride, referring the photo-induced transfer of electrons between POM and Tris@anhydrides. The dielectric loss is found to be higher in Tris@anhydride as compared to the Tris@NiPOM, and Tris@ZnPOM. From the MEP analysis it has been seen that POM act as an electron with drawing subunit when conjugated with the anhydride. Different global reactivity parameters (μ, η and ω) were estimated from the frontier molecular orbitals (FMO) analysis, and the order of reactivity for Tris@anhydride, Tris@NiPOM, and Tris@ZnPOM is determined to be in accordance with their increasing band gap i.e., Tris@anhydride > Tris@NiPOM > Tris@ZnPOM. The increase in efficiency (η) of photovoltaics response for Tris@ZnPOM (2.35) is found to be higher as compared to Tris@NiPOM (1.25) and ). The presence of Zn in ADP is responsible for increasing the efficiency of Tris@ZnPOM due to its low band gap that causes the easiest transfer of electron.

中文翻译：

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χ-Anderson 型多金属氧酸盐和酸酐基聚酰亚胺：染料敏化太阳能电池的合成、表征和光伏响应

高效的电子传输和最大限度地减少复合损失对于优化 DSSC 性能至关重要，因此需要采取改善电子扩散和减少电荷复合的策略。两种基于 型多金属氧酸盐的新型环保聚酰亚胺，即 Tris@ZnPOM 和 Tris@NiPOM，一种具有含锌安德森型 POM（ADP），另一种具有含镍安德森型 POM，分别具有合成并通过 FT-IR、UV-vis 进行表征。光谱分析、TGA、H NMR、荧光和循环伏安分析。与 Tris@酸酐相比，Tris@ZnPOM 和 Tris@NiPOM 的荧光猝灭分别为 98% 和 99.7%，指的是 POM 和 Tris@酸酐之间的光诱导电子转移。与 Tris@NiPOM 和 Tris@ZnPOM 相比，Tris@anhydride 的介电损耗更高。从MEP分析可以看出，当与酸酐共轭时，POM充当具有吸引亚基的电子。根据前沿分子轨道 (FMO) 分析估计了不同的全局反应性参数（μ、η 和 ω），并确定了 Tris@anhydride、Tris@NiPOM 和 Tris@ZnPOM 的反应性顺序与其递增一致带隙即 Tris@anHydride > Tris@NiPOM > Tris@ZnPOM。与 Tris@NiPOM (1.25) 和 ) 相比，Tris@ZnPOM (2.35) 的光伏响应效率 (η) 增加更高。 ADP 中 Zn 的存在有助于提高 Tris@ZnPOM 的效率，因为它的带隙较低，导致电子最容易转移。