Two-dimensional metal organic framework nanosheets demonstrate various applications in chemical separation and purification, biological recognition and sensing, catalysis, and optoelectronics, though the exfoliation of metal organic framework nanosheets with good dispersibility are challenging. Here we report an efficient method for exfoliating a novel tellurophene-based two-dimensional metal organic framework with a branched polymer surfactant polyethylenimine ethoxylate to prepare single- and few-layer nanosheets. Furthermore, the hybrid ink is directly integrated as an electron extraction layer for high-performance organic solar cells, which exhibits enhanced power conversion efficiency in comparison to the polyethylenimine ethoxylate-based ones due to the suppressed charge recombination, tunable work function and improved conductivity. This contribution not only reports a novel method to prepare stable two-dimensional metal organic framework nanosheets but also opens an avenue for their applications in solar cells.

二维金属有机骨架纳米片展示了在化学分离和纯化，生物识别和传感，催化和光电子学中的各种应用，尽管具有良好分散性的金属有机骨架纳米片的剥离具有挑战性。在这里，我们报告了一种有效的方法，用于剥落带有分支聚合物表面活性剂聚乙烯亚胺乙氧基化物的新型基于碲二苯醚的二维金属有机骨架，以制备单层和多层纳米片。此外，杂化油墨直接集成为高性能有机太阳能电池的电子提取层，与聚乙撑亚胺乙氧基化物类相比，由于抑制了电荷重组，可调节的功函数和提高的电导率，因此具有更高的功率转换效率。