螺二芴基分子作为太阳能电池空穴传输材料的前景,Solar RRL

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螺二芴基分子作为太阳能电池空穴传输材料的前景
Solar RRL ( IF 6.0 ) Pub Date : 2023-01-27 , DOI: 10.1002/solr.202201108
Luca Vaghi ₁ , Fabio Rizzo _{2,

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Affiliation

有机-无机卤化物钙钛矿太阳能电池（PSC）和有机太阳能电池（OSC）作为替代可再生光伏技术引起了极大的关注。最先进的 spiro-OMeTAD (2,2',7,7'-tetrakis-( N,N -di- p-methoxyphenylamine)-9,9'-spirobifluorene) 是 PSC 中最成功的空穴传输材料 (HTM)，而溶液处理的倒置 OSC 通常使用聚（3,4-乙烯二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：附言）。最近，报道了各种基于螺二芴的有机小分子克服了螺-OMeTAD 的已知缺点，例如复杂的合成路线、高合成成本以及需要吸湿性掺杂剂以提高载流子迁移率和器件性能。基于螺二芴的分子的例子也被报道为倒置 OSC 中的替代 HTM，以克服 PEDOT:PSS 的缺点，例如酸度和批次间的重现性。这些特性极大地限制了 spiro-OMeTAD 和 PEDOT:PSS 在未来的大规模应用。在此处，通过关注合成和电气特性，概述了螺二芴有机小分子作为 PSC 和 OSC 中 HTM 的最新发展。最后，讨论了进一步的研究方向，以开发新型螺二芴基 HTM，以实现可靠且长期稳定的光伏器件。

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The Future of Spirobifluorene-Based Molecules as Hole-Transporting Materials for Solar Cells

Organic–inorganic halide perovskite solar cells (PSCs) and organic solar cells (OSCs) attract great attention as alternative renewable photovoltaic technology. The state-of-the-art spiro-OMeTAD (2,2′,7,7′-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene) is the most successful hole-transport material (HTM) employed in PSCs, whereas solution-processed inverted OSCs generally use poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Recently, various types of spirobifluorene-based organic small molecules are reported to overcome the known disadvantages of spiro-OMeTAD, such as the complex synthetic route, high synthetic cost, and requirement for hygroscopic dopants to improve the charge-carrier mobility and device performance. Examples of spirobifluorene-based molecules are also reported as alternative HTMs in inverted OSCs to exceed the drawbacks of PEDOT:PSS, such as acidity and batch-to-batch reproducibility. These features significantly limit spiro-OMeTAD and PEDOT:PSS for large-scale application in the future. Herein, an overview of recent developments in spirobifluorene organic small molecules as HTM in PSCs and OSCs is provided by focusing on synthetic and electrical features. Finally, the further research directions are discussed to develop novel spirobifluorene-based HTMs for the realization of reliable and long-term stable photovoltaic devices.

更新日期：2023-01-27

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