Stabilized and Operational PbI2 Precursor Ink for Large-Scale Perovskite Solar Cells via Two-Step Blade-Coating,The Journal of Physical Chemistry C

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Stabilized and Operational PbI2 Precursor Ink for Large-Scale Perovskite Solar Cells via Two-Step Blade-Coating
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-04-01 , DOI: 10.1021/acs.jpcc.0c00908
Zengqi Huang _{1,

2} , Xiaotian Hu _{1,

2} , Zhi Xing _{1,

2} , Xiangchuan Meng _{1,

2} , Xiaopeng Duan _{1,

2} , Juan Long _{1,

2} , Ting Hu _{2,

3} , Licheng Tan _{1,

2} , Yiwang Chen _{1,

2,

4}

Affiliation

Perovskite solar cells (PVSCs) have made dramatic progress benefiting by various preparation methods in the past few years. Particularly, a two-step deposition technique has been demonstrated as an efficient, low-cost approach to fabricate large-scale PVSCs. However, these large-scale PVSCs are lagging far behind the state-of-the-art spin-coated counterparts because of the unstabilized nature of PbI₂ precursor ink and the difficulty in complete conversion to crystallized perovskite films. Here, we demonstrate a stabilized and operational trace methylammonium iodide (MAI)–polyurethane (PU)–lead iodide (PbI₂) (MP–PbI₂) precursor ink formulation to fabricate large-scale PVSCs via the blade-coating process. The synergetic effects of trace MAI and PU can regulate the rheological properties of PbI₂ precursor ink and form an oriented intermediate complex, which are beneficial for constructing compact perovskite films with fewer pinholes and defects. Thus, the MP–PbI₂-based PVSCs yield power conversion efficiencies (PCEs) over 19% for a 0.12 cm² device and 11.07% for a 25 cm² solar module. Moreover, flexible PVSC with a PCE of 17.30% has been manufactured using this scalable ink formulation and maintaining over 90% of its original PCE after 6000 bending cycles at the radius of 3 mm. This approach opens up a new precursor engineering for achieving large-scale PVSCs via roll-to-roll technology.

中文翻译：

通过两步刀片式涂布用于大型钙钛矿太阳能电池的稳定且可操作的PbI ₂前体油墨

过去几年中，受益于各种制备方法，钙钛矿太阳能电池（PVSC）取得了巨大进步。特别地，已经证明了两步沉积技术是制造大规模PVSC的有效，低成本方法。但是，由于PbI ₂前体油墨的不稳定特性以及难以完全转化为结晶的钙钛矿薄膜，这些大型PVSC远远落后于最新的旋涂同类产品。在这里，我们展示了稳定且可操作的痕量甲基碘化铵（MAI）-聚氨酯（PU）-碘化铅（PbI ₂）（MP-PbI ₂）前体油墨配方，以通过刮涂工艺制造大规模的PVSC。痕量MAI和PU的协同作用可以调节PbI ₂前体油墨的流变性能，并形成定向的中间配合物，这对于构造具有更少针孔和缺陷的紧凑钙钛矿薄膜是有利的。因此，基于MP–PbI ₂的PVSC对于0.12 cm ^2的器件产生超过19％的功率转换效率（PCE），而对于25 cm ^2的器件产生超过11.07％的功率转换效率（PCE）。太阳能模块。此外，使用这种可扩展的油墨配方可生产出PCE为17.30％的柔性PVSC，并且在3 mm的半径下进行6000次弯曲之后，可保持其原始PCE的90％以上。这种方法为通过卷对卷技术实现大规模PVSC开辟了新的前驱工程。

更新日期：2020-04-01

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