Recently, significant progresses have been achieved in the fabrication of highly efficient perovskite solar cells, while major challenges, such as commercial viablity of exoctic materials and their instability, remain as an obstacle. Hole transporting materials (HTMs) represent a tricky choice for the fabrication of efficient solar cells and the cost uneffective Spiro-OMeTAD continue to be so far the most obvious candidate. Organometalic complexes, such as phthalocyanine metal complexes appeared as a promising class of p-type material, since they are less expensive and more stable. Herein, we report the synthesis of a novel Cu(II)-based phthalocyanine ((tOctPhO)8CuPc 1) with 4-tert-octylphenol-substituted function groups that possesses a very good solubility in a wide range of organic solvents, and thus can be applied from solution processing in a wide range of electro-optical devices. In the present work (tOctPhO)8CuPc 1, and its Zn(II) analogoes phthalocyanine (represented as (tOctPhO)8ZnPc 2) were tested in mixed perovskites (FAPbBr3)0.85(MAPbI3)0.15 for the fabrication of perovskite solar cell. These phthalocyanine based HTMs gave competetive power conversion efficiencies and demonstrated superior stability when compared to classical HTMs.

中文翻译：

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Cu（II）和Zn（II）基酞菁作为钙钛矿太阳能电池的空穴选择层

近来，在高效钙钛矿太阳能电池的制造中已经取得了重大进展，而主要挑战，例如外来材料的商业可行性及其不稳定性，仍然是一个障碍。空穴传输材料（HTM）是制造高效太阳能电池的一个棘手选择，而迄今为止成本低廉的Spiro-OMeTAD仍然是最明显的选择。有机金属络合物（例如酞菁金属络合物）似乎是有前途的p型材料，因为它们更便宜且更稳定。在此，我们报告了具有4-叔辛基苯酚取代的官能团的新型基于Cu（II）的酞菁（（tOctPhO）8CuPc 1）的合成，该官能团在各种有机溶剂中具有非常好的溶解性，因此，可以通过溶液处理应用于各种光电器件中。在目前的工作中，在混合钙钛矿（FAPbBr3）0.85（MAPbI3）0.15中测试了（tOctPhO）8CuPc 1及其Zn（II）类似物酞菁（表示为（tOctPhO）8ZnPc 2），以制造钙钛矿型太阳能电池。与传统的HTM相比，这些基于酞菁的HTM具有竞争性的功率转换效率，并显示出卓越的稳定性。