This paper discusses a series of triphenylamine dibenzofulvene–based hole transporting materials (HTMs) featuring different numbers of MeO groups (none for YC‐1, four for YC‐2, and six for YC‐3) and their use in p‐i‐n perovskite solar cells (PSCs). We investigated the optoelectronic properties of these HTMs and found that the PSC devices incorporating YC‐1 as HTMs exhibited power conversion efficiencies (PCEs) of 15.78 ± 0.61%, which outperformed the corresponding PEDOT:PSS‐based device (12.80 ± 1.31%) under similar testing conditions. We then employed YC‐1 for the interfacial modified layer of a NiO_x‐derived PSC having the structure ITO/NiO_x/YC‐1/CH₃NH₃PbI₃/PC₆₁BM/bathocuproine/Ag. The presence of YC‐1 promoted the growth of micrometer‐sized grains of perovskite and induced a lower content of grain boundary defects, both of which improved the carrier extraction. Thereby, compared with conventional NiO_x device, we observed a great increase in the PCE, from 17.16 ± 0.68% to 18.81 ± 0.42%, with a champion cell displaying a PCE of 19.37% (with negligible hysteresis). The corresponded device exhibited a stabilized efficiency of approximately 19% after storage in the dark at 25°C under argon for over 1000 hours. This study suggests a new approach for designing the high‐performance stable p‐i‐n PSCs.

中文翻译：

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源自三苯胺二苯并富勒烯的无掺杂空穴传输层可诱导微米级钙钛矿晶粒，使p-i-n钙钛矿太阳能电池的效率接近20％

本文讨论的MeO特征基团的不同数目（没有一系列的三苯胺基于二苯并富烯的空穴输送性材料（HTMS）YC-1 ，四项YC-2对和六个YC-3 ）和它们在使用中对-异丙n钙钛矿太阳能电池（PSC）。我们研究了这些HTM的光电性能，发现将YC-1用作HTM的PSC器件的功率转换效率（ PCE）为15.78±0.61％，在相应的PEDOT：PSS器件（12.80±1.31％）之下表现出色类似的测试条件。然后，我们将YC-1用于结构为ITO / NiO _x的NiO _x衍生的PSC的界面改性层/ YC-1 / CH ₃ NH ₃ PbI ₃ / PC ₆₁ BM / bathocuproine / Ag。YC-1的存在促进了钙钛矿中微米级晶粒的生长，并引起了较低的晶界缺陷含量，这两者都改善了载流子的提取。因此，与传统的NiO _x器件相比，我们观察到PCE大大增加，从17.16±0.68％增至18.81±0.42％，而冠军电池的PCE则为19.37％（滞后可以忽略不计）。相应的装置在25°C下在氩气中黑暗保存1000小时后，其稳定效率约为19％。这项研究提出了一种设计高性能稳定p-i-n PSC的新方法。