Amorphous hole-transporting layer in slot-die coated perovskite solar cells
Amorphous hole-transporting layer in slot-die coated perovskite solar cells
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DOI：
10.1016/j.nanoen.2016.11.022
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发表时间：
2017
期刊：
影响因子：
17.6
通讯作者：
Tian-shi Qin;Wenchao Huang;Jueng‐Eun Kim;Doojin Vak;C. Forsyth;C. McNeill;Yi-bing Cheng
中科院分区：
文献类型：
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作者：
Tian-shi Qin;Wenchao Huang;Jueng‐Eun Kim;Doojin Vak;C. Forsyth;C. McNeill;Yi-bing Cheng
Percent太阳能电池可以通过溶液工艺生产，并且已经实现了超过20%的功率转换效率以及改善的长期稳定性，为低成本，高效率的光伏技术提供了巨大的潜力。越来越多的努力已经转移到实验室到Fab的翻译，其中设备制造是通过使用完全可扩展的打印过程来完成的。然而，用于放大装置的一个显著瓶颈是缺乏可在印刷制造期间形成所需形态的可缩放空穴传输材料（HTM）。在这篇手稿中，我们将扭曲但完全π-共轭的2，2 ′，7，7 ′-四（N，N-二-对甲氧基苯基）胺-9，9 ′-联芴亚基（Bifluo-OMeCl 2）应用于狭缝式涂布器件中，其表现出优异的成膜性能，并且优于众所周知的Spiro-OMeCl 2 HTM。通过分子设计实现了Bifluo-OMeCl 2的成膜性能的改善，Bifluo-OMeCl 2的化学结构有效地抑制了印刷过程中的结晶。在基于Bifluo-OMeCl 2的完全狭缝式模具涂覆的器件中实现了14.7%的功率转换效率，优于之前报道的全印刷钙钛矿太阳能电池的值。因此，Bifluo-OMeAl 2 O3具有替代Spiro-OMeAl 2 O3用于大规模卷对卷生产完全狭缝式模具涂覆的钙钛矿太阳能电池的吸引力潜力。
Perovskite solar cells can be produced by a solution process and have achieved power conversion efficiency over 20% as well as improving long-term stability, offering great potential for a low cost, high efficiency photovoltaic technology. An increasing effort has been shifted to Lab-to-Fab translation, where device manufacture is accomplished by using a fully scalable printing process. One remarkable bottleneck for upscaling the device is, however, the lack of scalable hole-transport materials (HTMs) that can form the desired morphology during the printing fabrication. In this manuscript, we apply a twisted but fully π-conjugated 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl)amine-9,9′-bifluorenylidene (Bifluo-OMeTAD) into slot-die coated devices, which exhibits excellent film forming properties and outperforms the well-known Spiro-OMeTAD HTM. The improved film forming properties of Bifluo-OMeTAD are achieved via molecular design, with the chemical structure of Bifluo-OMeTAD effectively suppressing crystallization during printing. A power conversion efficiency of 14.7% is achieved in the fully slot-die coated devices based on Bifluo-OMeTAD, outperforming previous reported values for all-printed perovskite solar cells. Therefore, Bifluo-OMeTAD has attractive potential to replace Spiro-OMeTAD for the large scale roll-to-roll production of fully slot-die coated perovskite solar cells.