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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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