Inverted (pin) perovskite solar cells (PSCs) afford improved operating stability in comparison to their nip counterparts but have lagged in power conversion efficiency (PCE). The energetic losses responsible for this PCE deficit in pin PSCs occur primarily at the interfaces between the perovskite and the charge-transport layers. Additive and surface treatments that use passivating ligands usually bind to a single active binding site: This dense packing of electrically resistive passivants perpendicular to the surface may limit the fill factor in pin PSCs. We identified ligands that bind two neighboring lead(II) ion (Pb²⁺) defect sites in a planar ligand orientation on the perovskite. We fabricated pin PSCs and report a certified quasi–steady state PCE of 26.15 and 24.74% for 0.05– and 1.04–square centimeter illuminated areas, respectively. The devices retain 95% of their initial PCE after 1200 hours of continuous 1 sun maximum power point operation at 65°C.

中文翻译：

---

使用双位点结合配体改善倒置钙钛矿太阳能电池的电荷提取

与压区同类产品相比，倒置（pin）钙钛矿太阳能电池（PSC）具有更高的运行稳定性，但在功率转换效率（PCE）方面落后。 pin PSC 中 PCE 不足的能量损失主要发生在钙钛矿和电荷传输层之间的界面处。使用钝化配体的添加剂和表面处理通常结合到单个活性结合位点：垂直于表面的电阻钝化剂的这种密集堆积可能会限制 pin PSC 中的填充因子。我们确定了在钙钛矿上以平面配体方向结合两个相邻铅（II）离子（Pb ²⁺ ）缺陷位点的配体。我们制造了 pin PSC，并报告了 0.05 和 1.04 平方厘米照明区域的经认证准稳态 PCE 分别为 26.15 和 24.74%。在 65°C 下连续运行 1 太阳最大功率点 1200 小时后，这些器件仍保留了 95% 的初始 PCE。