Polymer‐Modified ZnO Nanoparticles as Electron Transport Layer for Polymer‐Based Solar Cells,Advanced Functional Materials

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Polymer‐Modified ZnO Nanoparticles as Electron Transport Layer for Polymer‐Based Solar Cells
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-06-21 , DOI: 10.1002/adfm.202002932
Pu Fan _{1,

2} , Dayong Zhang ₁ , Yao Wu ₂ , Junsheng Yu ₁ , Thomas P. Russell ₂

Affiliation

The optimization of interfacial layer plays a critical role in the ultimate use of polymer‐based solar cells (PSCs). By introducing an insulating polymer, polystyrene (PS), into the ZnO nanoparticles (NPs) with large particle size, an electron transport layer (ETL) with a thickness of more than 130 nm is produced. The doping of PS not only improves the film quality of ZnO NPs to generate a denser, smoother, and more uniform ETL, but also increases the contact properties between the hydrophilic ZnO and hydrophobic active layer. In comparison to control devices, the power conversion efficiencies (PCEs), short circuit current densities, and fill factors of PSCs with the PS‐modified ETL for a typical fullerene system PTB7‐Th:PC₇₁BM and, also, a nonfullerene system PBDB‐T:ITIC are increased, with PCEs from 8.49% to 9.54% and 10.03% to 11.05%, respectively. The reproducibility, mechanical endurance, and ambient stability of the PSCs with the PS‐modified ZnO NP ETL are significantly improved. The combination of the insulating polymer and ZnO NPs provides a simple, low‐cost way to realize the commercialization of high performance, flexible PSCs.

中文翻译：

聚合物改性的ZnO纳米粒子作为基于聚合物的太阳能电池的电子传输层

界面层的优化在聚合物基太阳能电池（PSC）的最终使用中起着至关重要的作用。通过将绝缘聚合物聚苯乙烯（PS）引入大粒径的ZnO纳米颗粒（NPs）中，可以生产出厚度大于130 nm的电子传输层（ETL）。PS的掺杂不仅可以改善ZnO NP的膜质量，从而生成更致密，更平滑和更均匀的ETL，而且还可以提高亲水性ZnO与疏水性活性层之间的接触性能。与控制设备相比，对于典型的富勒烯系统PTB7-Th：PC ₇₁，PS改性ETL的功率转换效率（PCE），短路电流密度和PSC的填充因子BM以及非富勒烯体系PBDB-T：ITIC也有所增加，PCE分别从8.49％增加到9.54％，从10.03％增加到11.05％。使用PS修饰的ZnO NP ETL的PSC的重现性，机械耐久性和环境稳定性得到显着改善。绝缘聚合物和ZnO NP的组合提供了一种简单，低成本的方法来实现高性能，柔性PSC的商业化。

更新日期：2020-08-08

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