Exploring Electron Transporting Layer in Combination with a Polyelectrolyte for n‐i‐p Perovskite Solar Cells,Advanced Materials Interfaces

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Exploring Electron Transporting Layer in Combination with a Polyelectrolyte for n‐i‐p Perovskite Solar Cells
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-07-08 , DOI: 10.1002/admi.202000412
Mengjie Sun ₁ , Huimin Zhang ₁ , Chunjun Liang ₁ , Chao Ji ₁ , Xiping Jing ₂ , Fulin Sun ₁ , Qi Song ₁ , Fangtian You ₁ , Zhiqun He ₁

Affiliation

A double‐layered poly(ethylenimine) ethoxylated (PEIE)/SnO₂ composite structure, the ultrathin PEIE in contact with an indium‐tin‐oxide electrode, and an SnO₂ layer interfaced with the perovskite, is developed as an electron‐transport layer (ETL) in the preparation of perovskite solar cells. The surface energy and the work function of the top SnO₂ side of the composite ETL can be finely adjusted by tuning the underneath polyelectrolyte PEIE layer. These control the nucleation process in the crystallization of the perovskite layer and reduce the energy level mismatch between the electron transport and perovskite layers. High performance perovskite solar cells having a certified power conversion efficiency of 21.3%, with negligible hysteresis are achieved.

中文翻译：

探索用于n-i-p钙钛矿太阳能电池的电子传输层与聚电解质的结合

已开发出双层聚乙撑亚乙基乙氧基化（PEIE）/ SnO ₂复合结构，与铟锡氧化物电极接触的超薄PEIE以及与钙钛矿相接的SnO ₂层作为电子传输层（ETL）制备钙钛矿太阳能电池。可以通过调节下面的聚电解质PEIE层来精细调节复合ETL顶部SnO ₂侧的表面能和功函数。这些控制钙钛矿层结晶中的成核过程并减少电子传输层和钙钛矿层之间的能级失配。实现了高性能钙钛矿太阳能电池，其认证的功率转换效率为21.3％，滞后可以忽略不计。

更新日期：2020-09-11

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