NiOx-Seeded Self-Assembled Monolayers as Highly Hole-Selective Passivating Contacts for Efficient Inverted Perovskite Solar Cells,Solar RRL

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NiOx-Seeded Self-Assembled Monolayers as Highly Hole-Selective Passivating Contacts for Efficient Inverted Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2021-10-01 , DOI: 10.1002/solr.202100663
Juanjuan Sun _{1,

2} , Chunhui Shou ₃ , Jingsong Sun _{1,

3} , Xinlong Wang ₁ , Zhenhai Yang ₁ , Ying Chen ₁ , Jiarui Wu ₁ , Weichuang Yang ₁ , Hanlin Long ₁ , Zhiqin Ying ₁ , Xi Yang ₁ , Jiang Sheng ₁ , Baojie Yan ₁ , Jichun Ye ₁

Affiliation

Self-assembled monolayers (SAMs) have emerged as effective carrier transport layers in perovskite (PVK) solar cells because of their unique ability to manipulate interfacial property, as well as simple processing and scalable fabrication. However, the defects and pinholes derived from their sensitive adsorption process inevitably deteriorate the final device performance. Herein, a sputtered nickel oxide (NiO_x) interlayer is used as a seed layer to promote the adsorption of the [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid (MeO-2PACz) SAM on the indium tin oxide (ITO) substrate. The promoted adsorption is attributed to the enhanced tridentate binding between MeO-2PACz and NiO_x relative to the conventional bidentate binding between MeO-2PACz and ITO. In addition, the NiO_x modification can simultaneously improve the passivation ability and hole-selectivity of the MeO-2PACz, provide a favorable energy-level alignment at the ITO/PVK interface, and prevent a direct contact between PVK and ITO. As a consequence, this NiO_x-seeded MeO-2PACz hole transport layer enables a significantly enhanced power conversion efficiency of 19.9% in comparison with 18.4% of the control device. This work provides an effective strategy to improve the performance of the SAM-based photoelectric device.

中文翻译：

NiOx 种子自组装单层作为高效倒置钙钛矿太阳能电池的高空穴选择性钝化触点

自组装单层 (SAM) 已成为钙钛矿 (PVK) 太阳能电池中有效的载流子传输层，因为它们具有操纵界面性质的独特能力，以及简单的加工和可扩展的制造。然而，由于其敏感的吸附过程产生的缺陷和针孔不可避免地会降低最终器件的性能。在此，溅射氧化镍 (NiO _x ) 夹层用作种子层以促进 [2-(3,6-二甲氧基-9H-咔唑-9-基)乙基]膦酸 (MeO-2PACz) 的吸附氧化铟锡 (ITO) 基板上的 SAM。促进吸附归因于 MeO-2PACz 和 NiO _{x 之间}相对于 MeO-2PACz 和 ITO 之间的常规双齿结合增强的三齿结合。此外，NiO_x修饰可以同时提高 MeO-2PACz 的钝化能力和空穴选择性，在 ITO/PVK 界面提供有利的能级排列，并防止 PVK 和 ITO 之间的直接接触。因此，与控制装置的 18.4% 相比，这种 NiO_x种子 MeO-2PACz 空穴传输层能够显着提高 19.9% 的功率转换效率。这项工作提供了一种有效的策略来提高基于 SAM 的光电器件的性能。

更新日期：2021-11-04

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