Bifunctional Organic Disulfide for High-Efficiency and High-Stability Planar Perovskite Solar Cells,ACS Applied Energy Materials

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Bifunctional Organic Disulfide for High-Efficiency and High-Stability Planar Perovskite Solar Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-09-24 , DOI: 10.1021/acsaem.0c01329
Liang Wang ₁ , Shuzhang Yang ₁ , Qianji Han ₁ , Fengyang Yu ₁ , Xiaoyong Cai ₂ , Fengjing Liu ₂ , Chu Zhang ₃ , Tingli Ma _{1,

3}

Affiliation

In this study, we used a bifunctional organic disulfide, di-5-(1-methyltetrazole) disulfide (T₂), in perovskite films to improve the performance and stability of planar perovskite solar cells (PSCs). The results indicate two major functions of T₂ in PSCs: improving the perovskite crystal quality due to the interaction between T₂ and perovskite and eliminating Pb⁰ and I⁰ defects by redox reaction, allowing for the regeneration of T₂ in the process. We achieved a power conversion efficiency (PCE) of PSCs with T₂ of 20.67%, a 15% increase compared to the control device (17.9%). Furthermore, PSC devices with T₂ exhibited enhanced operational stability and storage stability. During 140 s of operation, there was no evident decrease of PCE. The device maintained 95% of its initial efficiency without encapsulation under ambient conditions (20 °C, 40% humidity) for 2 months.

中文翻译：

用于高效和高稳定性平面钙钛矿太阳能电池的双功能有机二硫化物

在这项研究中，我们在钙钛矿薄膜中使用了一种双功能有机二硫化物二-5-（1-甲基四唑）二硫化物（T ₂），以改善平面钙钛矿太阳能电池（PSC）的性能和稳定性。结果表明，T ₂在PSC中的两个主要功能是：由于T ₂和钙钛矿之间的相互作用而改善了钙钛矿晶体的质量，并通过氧化还原反应消除了Pb ⁰和I ⁰缺陷，从而使过程中的T ₂再生。我们实现了PSC的功率转换效率（PCE），T ₂为20.67％，与控制设备（17.9％）相比增加了15％。此外，带有T _2的PSC设备表现出增强的操作稳定性和储存稳定性。在140 s的操作期间，PCE没有明显下降。该器件在环境条件（20°C，40％湿度）下无需封装2个月，即可保持其95％的初始效率。

更新日期：2020-10-26

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