In this work, monolithic, crystalline, porous, and oriented porphyrin thin films are grown using a novel van der Waals layer‐by‐layer (lbl) epitaxial growth protocol, yielding an unusual AB‐stacking motif of these interesting macrocycles units. Subsequently, these surface‐mounted metal‐organic frameworks (SURMOFs) are transformed by thermal treatment to yield well‐performing counter electrodes (CEs) for dye‐sensitized solar cells. During this calcination, the heterocyclic macrocycles are metalated, yielding compact, homogeneous, and very stable metalloporphyrin thin films (ZnTCPP‐C) with excellent CE performance. For thin films fabricated using three lbl cycles (thickness ≈17 nm), the power conversion efficiency is found to amount to 5.63%, making it a promising candidate to replace Pt CE (6.72%). Such calcined SURMOFs carry huge potential for fabricating electronic and photovoltaic devices.

中文翻译：

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van der Waals用于染料敏化太阳能电池的二维金属-卟啉骨架衍生薄膜的外延生长

在这项工作中，使用新颖的范德华逐层（lbl）外延生长方案生长了整体，结晶，多孔和定向的卟啉薄膜，从而产生了这些有趣的大环化合物单元不同寻常的AB堆积图案。随后，通过热处理将这些表面安装的金属有机框架（SURMOF）转变为用于染料敏化太阳能电池的性能良好的对电极（CE）。在此煅烧过程中，杂环大环被金属化，生成致密，均匀且非常稳定的金属卟啉薄膜（ZnTCPP-C），具有出色的CE性能。对于使用三个lbl周期（厚度≈17nm）制造的薄膜，功率转换效率为5.63％，使其有望取代Pt CE（6.72％）。