Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells
Bilateral alkylamine for suppressing charge recombination and improving stability in blade-coated perovskite solar cells
复制标题
DOI：
10.1126/sciadv.aav8925
复制
发表时间：
2019-03-01
期刊：
影响因子：
13.6
通讯作者：
Huang, Jinsong
中科院分区：
文献类型：
--
作者：
Wu, Wu-Qiang;Yang, Zhibin;Huang, Jinsong
钙钛矿太阳能电池（PSCs）的功率转换效率（PCEs）已经高于其他薄膜技术，但实验室电池制造方法无法扩展。在这里，我们报告了一种增材策略，以提高可扩展叶片制造的psc的效率和稳定性。加入双侧烷基胺（BAA）添加剂的叶片涂层PSCs在AM1.5G照明下，pce分别为21.5（孔径0.08 cm(2)）和20.0%（孔径1.1 cm(2)），开路电压亏降为0.35 V，创历史新低。在0.3个太阳下，稳定的PCE达到22.6%。锚定单层双侧氨基钝化钙钛矿表面缺陷，并通过暴露连接疏水烷基链增强钙钛矿的稳定性。BAA增强了材料的晶界，增强了材料抗机械弯曲和电子束损伤的能力。BAA将器件的货架寿命提高到1000小时，在光照下的工作稳定性提高到500小时，并保留了90%的初始效率。
The power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) are already higher than that of other thin film technologies, but laboratory cell-fabrication methods are not scalable. Here, we report an additive strategy to enhance the efficiency and stability of PSCs made by scalable blading. Blade-coated PSCs incorporating bilateral alkylamine (BAA) additives achieve PCEs of 21.5 (aperture, 0.08 cm(2)) and 20.0% (aperture, 1.1 cm(2)), with a record-small open-circuit voltage deficit of 0.35 V under AM1.5G illumination. The stabilized PCE reaches 22.6% under 0.3 sun. Anchoring monolayer bilateral amino groups passivates the defects at the perovskite surface and enhances perovskite stability by exposing the linking hydrophobic alkyl chain. Grain boundaries are reinforced by BAA and are more resistant to mechanical bending and electron beam damage. BAA improves the device shelf lifetime to > 1000 hours and operation stability to > 500 hours under light, with 90% of the initial efficiency retained.