钝化缺陷并调节 ZnO 阴极中间层的表面能，用于高效非富勒烯有机太阳能电池,Solar RRL

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钝化缺陷并调节 ZnO 阴极中间层的表面能，用于高效非富勒烯有机太阳能电池
Solar RRL ( IF 6.0 ) Pub Date : 2022-10-29 , DOI: 10.1002/solr.202200871
Haolan Zheng _{1,

2} , Dan Zhou ₁ , Lin Hu ₂ , Zhentian Xu ₃ , Haitao Xu ₁ , Yonhui Zhang ₃ , Yongfen Tong ₁ , Bin Hu ₁ , Zaifang Li ₂ , Lie Chen ₃

Affiliation

电荷传输是非富勒烯有机太阳能电池 (NOSC) 中一个有意义的过程。然而，由于其金属氧化物的固有缺陷，经典的ZnO电子传输层会严重阻碍电荷传输，其高表面能会导致与低表面能活性层的错配接触。因此，聚乙烯亚胺乙氧基化（PEIE）经季铵化和酯化处理得到聚乙烯亚胺乙氧基化-苯基乙酰氯（PEIE-PAC）。通过将 PEIE-PAC 与 ZnO 前驱体溶液共混，制备了具有较少缺陷和较低表面能薄膜的 ZnO:PEIE-PAC (ZnO-P)。与功率转换效率（PCE）为15.30%的ZnO基控制器件相比，由于氧缺陷和表面粗糙度的优化，ZnO-P基器件在PM6:Y6体系中的PCE提高到16.47%。同时，由于ZnO-P表面能的降低，ZnO-P与疏水性非富勒烯受体的接触更加紧密，可以隔绝外界环境中的水和氧，从而增强NOSCs在空气中的稳定性。基于 ZnO-P 的 PM6:Y6 器件在 N₂和环境温度，老化1000 h后，ZnO-P基器件的PCE仍为初始PCE的85%以上。

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Passivating the Defects and Modulating the Surface Energy of ZnO Cathode Interlayer for Efficient Nonfullerene Organic Solar Cells

Charge transport is a meaningful process in nonfullerene organic solar cells (NOSCs). However, owing to the inherent defects of its metal oxide, the classic ZnO electron transport layer will severely hinder charge transport, and its high surface energy can cause a mismatch contact with the low surface energy active layer. Therefore, polyethylenimine ethoxylated (PEIE) is treated with quaternization and esterification to obtain polyethylenimine ethoxylated-phenyl acetyl chloride (PEIE-PAC). ZnO:PEIE-PAC (ZnO-P) with fewer defects and lower surface energy film is prepared by blending PEIE-PAC with the precursor solution of ZnO. Compared with ZnO-based control device with a power conversion efficiency (PCE) of 15.30%, the PCE of ZnO-P-based device is increased to 16.47% in PM6:Y6 system due to the optimization of oxygen defects and surface roughness. Meanwhile, owing to the decrease of surface energy in ZnO-P, the contact between ZnO-P and hydrophobic nonfullerene acceptors is closer, and it can isolate water and oxygen in the external environment, thus enhancing the stability in air of NOSCs. The ZnO-P-based PM6:Y6 device maintains long-term storage stability in both N₂ and ambient temperature, and after 1000 h aging, the PCE of ZnO-P-based device is still more than 85% of the initial PCE.

更新日期：2022-10-29

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