Efficient Carbon-Based Perovskite Solar Cells Passivated by Alkylammonium Chloride,Solar RRL

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Efficient Carbon-Based Perovskite Solar Cells Passivated by Alkylammonium Chloride
Solar RRL ( IF 6.0 ) Pub Date : 2023-12-08 , DOI: 10.1002/solr.202300854
Shaowen Tang _{1,

2} , Peng-an Zong _{1,

2} , Jun Zhong ₃ , Fawang He ₂ , Nian Cheng ₄ , Fengling Hang ₂ , Xiaodong Feng ₁ , Zhenguo Liu _{2,

5,

6} , Wei Huang _{2,

5,

6}

Affiliation

Hole-transport layer (HTL)-free carbon-based perovskite solar cells (C-PSCs) have garnered significant attention in the research community due to their cost-effectiveness and high stability. However, the absence of a traditional HTL can lead to substantial nonradiative recombination of charge carriers between the perovskite layer and the carbon electrode, significantly impacting efficiency. Herein, the performance effects of different alkylammonium chlorides, including butylammonium chloride, octylammonium chloride, and dodecylammonium chloride (DACl), on perovskite (FA_0.1MA_0.9PbI₃) are investigated to produce high-performance HTL-free C-PSCs. Following passivation, the film exhibits a more uniform grain size distribution and fewer grain boundary defects. Furthermore, with an increase in the alkyl chain length, enhanced interactions with the perovskite film result in reduced trap state density and increased carrier lifetime. After DACl passivation, the C-PSC achieves a remarkable power conversion efficiency of 16.56% and a high open-circuit voltage (V_oc) of 1.074 V. The V_oc enhancement is primarily attributed to the better energy-level alignment, effectively improving hole transport and electron-blocking capabilities while suppressing nonradiative recombination. Additionally, they demonstrate exceptional hydrophobic characteristics and robust stability in the presence of humidity, making them particularly promising for future practical applications in the field of photovoltaics.

中文翻译：

烷基氯化铵钝化的高效碳基钙钛矿太阳能电池

无空穴传输层（HTL）的碳基钙钛矿太阳能电池（C-PSC）由于其成本效益和高稳定性而引起了研究界的广泛关注。然而，传统 HTL 的缺失会导致钙钛矿层和碳电极之间电荷载流子的大量非辐射复合，从而显着影响效率。在此，研究了不同烷基氯化铵（包括丁基氯化铵、辛基氯化铵和十二烷基氯化铵（DACl））对钙钛矿（FA _0.1 MA _0.9 PbI ₃）的性能影响，以生产高性能的无 HTL C-PSC。钝化后，薄膜表现出更均匀的晶粒尺寸分布和更少的晶界缺陷。此外，随着烷基链长度的增加，与钙钛矿薄膜的相互作用增强，导致陷阱态密度降低并增加载流子寿命。 DACl钝化后，C-PSC实现了16.56%的显着功率转换效率和1.074 V的高开路电压（V _{oc ）}。V _oc的增强主要归因于更好的能级对准，有效改善了空穴传输和电子阻挡能力，同时抑制非辐射复合。此外，它们在湿度存在下表现出卓越的疏水特性和强大的稳定性，使其在光伏领域的未来实际应用中特别有前景。

更新日期：2023-12-08

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