We have demonstrated two novel donor–acceptor–donor (D–A–D) hole‐transport material (HTM) with spiro[fluorene‐9,9′‐phenanthren‐10′‐one] as the core structure, which can be synthesized through a low‐cost process in high yield. Compared to the incorporation of the conventional HTM of commonly used 2,2′,7,7′‐tetrakis[N,N‐di(4‐methoxyphenyl)amino]‐9,9′‐spirobifluorene (Spiro‐OMeTAD), the synthesis process is greatly simplified for the presented D–A–D materials, including a minimum number of purification processes. This results in an increased production yield (>55 %) and suppressed production cost (<30 $ g⁻¹), in addition to high power conversion efficiency (PCE) in perovskite solar cells (PSCs). The PCE of a PSC using our D–A–D HTM reaches 16.06 %, similar to that of Spiro‐OMeTAD (16.08 %), which is attributed to comparable hole mobility and charge‐transfer efficiency. D–A–D HTMs also provide better moisture resistivity to prolong the lifetime of PSCs under ambient conditions relative to their Spiro‐OMeTAD counterparts. The proposed new type of D–A–D HTM has shown promising performance as an alternative HTM for PSCs and can be synthesized with high production throughput.

中文翻译：

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钙钛矿型太阳能电池供体-受体-供体空穴传输材料中的合成方便的螺[芴-9,9'-菲蒽-10'-one]

我们已经证明了两种新颖的以螺[芴-9,9'-菲蒽-10'-one]为核心结构的供体-受体-（D–A–D）空穴传输材料（HTM），可以合成通过低成本，高产量的过程。与合并常用的2,2'，7,7'-四[ N，N-二（4-甲氧基苯基）氨基] -9,9'-螺二芴（Spiro-OMeTAD）的常规HTM相比，合成对于现有的D–A–D材料，该过程得到了极大的简化，包括最少的纯化过程。这样可以提高产量（> 55％）和降低生产成本（<30 $ g ^-1），以及钙钛矿型太阳能电池（PSC）中的高功率转换效率（PCE）。使用D–A–D HTM的PSC的PCE达到16.06％，与Spiro-OMeTAD（16.08％）相似，这归因于可比的空穴迁移率和电荷转移效率。与Spiro-OMeTAD同类产品相比，D–A–D HTM还具有更好的耐湿性，从而可以延长PSC在环境条件下的使用寿命。拟议中的新型D–A–D HTM作为PSC的替代HTM已显示出令人鼓舞的性能，并且可以高产量地合成。