A Bionic Interface to Suppress the Coffee-Ring Effect for Reliable and Flexible Perovskite Modules with a Near-90% Yield Rate,Advanced Materials

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A Bionic Interface to Suppress the Coffee-Ring Effect for Reliable and Flexible Perovskite Modules with a Near-90% Yield Rate
Advanced Materials ( IF 27.4 ) Pub Date : 2022-05-18 , DOI: 10.1002/adma.202201840
Baojin Fan ₁ , Jian Xiong ₂ , Yanyan Zhang ₃ , Chenxiang Gong ₁ , Feng Li ₁ , Xiangchuan Meng ₁ , Xiaotian Hu _{1,

4} , Zhongyi Yuan ₁ , Fuyi Wang ₃ , Yiwang Chen _{1,

4,

5}

Affiliation

The inhomogeneity, poor interfacial contact, and pinholes caused by the coffee-ring effect severely affect the printing reliability of flexible perovskite solar cells (PSCs). Herein, inspired by the bio-glue of barnacles, a bionic interface layer (Bio-IL) of NiO_x/levodopa is introduced to suppress the coffee-ring effect during printing perovskite modules. The coordination effect of the sticky functional groups in Bio-IL can pin the three-phase contact line and restrain the transport of perovskite colloidal particles during the printing and evaporation process. Moreover, the sedimentation rate of perovskite precursor is accelerated due to the electrostatic attraction and rapid volatilization from an extraordinary wettability. The superhydrophilic Bio-IL affords an even spread over a large-area substrate, which boosts a complete and uniform liquid film for heterogeneous nucleation as well as crystallization. Perovskite films on different large-area substrates with negligible coffee-ring effect are printed. Consequently, inverted flexible PSCs and perovskite solar modules achieve a high efficiency of 21.08% and 16.87%, respectively. This strategy ensures a highly reliable reproducibility of printing PSCs with a near 90% yield rate.

中文翻译：

一种用于抑制咖啡环效应的仿生接口，用于可靠且灵活的钙钛矿模块，产率接近 90%

咖啡环效应引起的不均匀性、界面接触不良和针孔严重影响了柔性钙钛矿太阳能电池（PSC）的印刷可靠性。在此，受藤壶生物胶的启发，NiO _{x的仿生界面层 (Bio-IL)}/levodopa 被引入以抑制打印钙钛矿模块期间的咖啡环效应。Bio-IL中粘性官能团的配位作用可以固定三相接触线，抑制钙钛矿胶体颗粒在印刷和蒸发过程中的传输。此外，由于静电吸引和非凡的润湿性迅速挥发，钙钛矿前体的沉降速度加快。超亲水性 Bio-IL 在大面积基板上提供均匀分布，从而促进了异质成核和结晶的完整和均匀的液膜。在不同的大面积基板上打印钙钛矿薄膜，咖啡环效应可忽略不计。因此，倒置柔性 PSC 和钙钛矿太阳能电池组件的效率高达 21。分别为 08% 和 16.87%。这种策略确保了打印 PSC 的高度可靠的可重复性，并且良率接近 90%。

更新日期：2022-05-18

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