Recently, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has been developed to exceed 25%, and charge transport layer optimization is a promising strategy for further efficiency improvement in PSCs. Herein, a supramolecular complex [(C₈H₁₇)₄N]₄[SiW₁₂O₄₀] (TASiW‐12) is synthesized and its doped form in SnO₂ (hereafter S‐SnO₂) is used as a charge transport layer (electron transport layer, ETL). This study demonstrates that S‐SnO₂ introduction is a practical and effective way to improve the bulk ETL and those of the ETL/perovskite interface. S‐SnO₂ leads to improved band alignment, suppressed trap‐assisted charge recombination, and enhanced electron mobility. In addition, an enhanced open‐circuit voltage (V_oc) of 1.16 V and an efficiency of 22.8% are successfully achieved in n–i–p planar PSCs. Meanwhile, S‐SnO₂ acts as a crucial agent to reduce charge accumulation at the S‐SnO₂/perovskite interface. The device possesses superior stability for 3072 h with only a 5.65% loss of the initial PCE. These results indicate that high‐efficiency PSCs can be easily attained by introducing a TASiW‐12‐doped ETL with integrated functions.

中文翻译：

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[（C8H17）4N] 4 [SiW12O40]（TASiW-12）改性的SnO2电子传输层，用于高效稳定的钙钛矿太阳能电池

最近，钙钛矿太阳能电池（PSC）的功率转换效率（PCE）已发展到超过25％，而电荷传输层优化是进一步提高PSC效率的有前途的策略。在此，合成了超分子复合物[（C ₈ H ₁₇）₄ N] ₄ [SiW ₁₂ O ₄₀ ]（TASiW-12），并以SnO ₂（以下称S-SnO ₂）的掺杂形式用作电荷传输层。 （电子传输层，ETL）。这项研究表明，引入S‐SnO ₂是一种改进批量ETL和ETL /钙钛矿界面的ETL的实用有效方法。SnO ₂导致改善的能带排列，抑制的陷阱辅助电荷复合以及增强的电子迁移率。此外，在n–i–p平面PSC中成功实现了1.16 V的增强的开路电压（V _oc）和22.8％的效率。同时，S-SnO ₂起到了减少S-SnO ₂ /钙钛矿界面上电荷积累的关键作用。该器件在3072小时内具有出色的稳定性，而初始PCE仅损失5.65％。这些结果表明，通过引入具有集成功能的TASiW-12掺杂ETL可以轻松实现高效PSC。