School of Medicine, Shanghai University, Shanghai 200444, People's Republic of China.
Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Yanchang Road 149, Shanghai 200072, People's Republic of China.
Nanotechnology. 2023 May 2;34(28). doi: 10.1088/1361-6528/acccfc.
Organic solar cell (OSC) has drawn considerable interest in recent decades owing to their advantages of light weight, flexible, large area and potentially low-cost. Employing an appropriate hole-transporting layer (HTL) into an OSC device has been proved as an efficient method to obtain high efficiency OSC due to the enhancement of the hole transporting and extraction of the device. In this work, aqueous solution-processed MoO(s-MoO) thin films were employed as HTLs to construct non-fullerene PM6:Y6 OSCs. The s-MoOthin film was prepared by using an aqueous solution process from an isopolymolybdate [NH]MoO.4HO precursor followed by thermal annealing treatment to convert the precursor to MoO. The s-MoOHTL based PM6:Y6 device demonstrates a power conversion efficiency of 15.75%, which is 38% improved than that of the device with thermally evaporated-MoOas HTL and 8% improved than that of the device with PEDOT:PSS as HTL. The enhancement of the device performance could be attributed to the enhanced hole mobility and better band matching of the s-MoOHTL. Moreover, the s-MoOHTL based PM6:Y6 device exhibited higher device stability than those of the reference devices. Our finding indicates that this s-MoOfilm has great potential as efficient HTL for high performance non fullerene OSCs.
有机太阳能电池（OSC）因其重量轻、柔韧性好、面积大且成本低等优点，在近几十年引起了相当大的兴趣。在 OSC 器件中采用合适的空穴传输层（HTL）已被证明是获得高效 OSC 的有效方法，因为它可以提高器件的空穴传输和提取效率。在这项工作中，采用水溶液处理的 MoO（s-MoO）薄膜作为 HTL 来构建非富勒烯 PM6：Y6 OSC。s-MoO 薄膜是通过使用由均苯四甲酸铵[NH]MoO 制备的水溶液工艺制备的。4HO 前体，然后进行热退火处理将前体转化为 MoO。基于 s-MoO 的 PM6：Y6 器件的功率转换效率为 15.75%，比使用热蒸发 MoO 作为 HTL 的器件提高了 38%，比使用 PEDOT:PSS 作为 HTL 的器件提高了 8%。器件性能的提高可归因于 s-MoO HTL 中增强的空穴迁移率和更好的能带匹配。此外，基于 s-MoO 的 PM6：Y6 器件的器件稳定性高于参考器件。我们的发现表明，这种 s-MoO 薄膜具有作为高效 HTL 用于高性能非富勒烯 OSC 的巨大潜力。
