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Mixed-Phase Low-Dimensional Perovskite-Assisted Interfacial Lead Directional Management for Stable Perovskite Solar Cells with Efficiency over 24%
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-11-15 , DOI: 10.1021/acsenergylett.1c01878 Guozhen Liu 1 , Haiying Zheng 2 , Jiajiu Ye 1 , Shendong Xu 1 , Liying Zhang 1 , Huifen Xu 1 , Zheng Liang 1 , Xiaojing Chen 1 , Xu Pan 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-11-15 , DOI: 10.1021/acsenergylett.1c01878 Guozhen Liu 1 , Haiying Zheng 2 , Jiajiu Ye 1 , Shendong Xu 1 , Liying Zhang 1 , Huifen Xu 1 , Zheng Liang 1 , Xiaojing Chen 1 , Xu Pan 1
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The efficiency and stability of perovskite solar cells are affected by the Pb–I antisite and uncoordinated Pb0 defects existing at the interface. Directional management of Pb-based defects can reduce the defect density and voltage loss. In this work, to settle the Pb-based defects at the interface for further stabilization of the perovskite surface, we propose the strategy of designing a low-dimensional perovskite (LDP) by an amphoteric heterocyclic cation which can increase the defect formation energies and inhibit the generation of Pb–I antisite defects. The growth of the mixed-phase LDP can introduce a strong interaction with undercoordinated Pb2+ upon the surface of peroskite films accomplished with the ability of dealing with different types of surface-terminating ends. The modified devices showed an increased efficiency of 24.07% (stabilized efficiency of 23.25%) as well as improved overall stability. This opens up a direction for prompting the practical application of perovskite photovoltaic devices based on the directional management of Pb-based interface defects.
中文翻译：
用于稳定钙钛矿太阳能电池的混合相低维钙钛矿辅助界面引线定向管理效率超过 24%
钙钛矿太阳能电池的效率和稳定性受到界面处存在的 Pb-I 反位和未配位的 Pb 0缺陷的影响。铅基缺陷的定向管理可以降低缺陷密度和电压损失。在这项工作中，为了解决界面处的 Pb 基缺陷以进一步稳定钙钛矿表面，我们提出了通过两性杂环阳离子设计低维钙钛矿 (LDP) 的策略，该策略可以增加缺陷形成能并抑制Pb-I反位缺陷的产生。混合相 LDP 的生长可以引入与欠配位 Pb 2+的强相互作用在钙钛矿薄膜的表面上完成处理不同类型的表面终止端的能力。改进后的设备效率提高了 24.07%（稳定效率为 23.25%），整体稳定性也得到了提高。这为推动基于铅基界面缺陷定向管理的钙钛矿光伏器件的实际应用开辟了方向。
更新日期：2021-12-10
中文翻译：
用于稳定钙钛矿太阳能电池的混合相低维钙钛矿辅助界面引线定向管理效率超过 24%
钙钛矿太阳能电池的效率和稳定性受到界面处存在的 Pb-I 反位和未配位的 Pb 0缺陷的影响。铅基缺陷的定向管理可以降低缺陷密度和电压损失。在这项工作中，为了解决界面处的 Pb 基缺陷以进一步稳定钙钛矿表面，我们提出了通过两性杂环阳离子设计低维钙钛矿 (LDP) 的策略，该策略可以增加缺陷形成能并抑制Pb-I反位缺陷的产生。混合相 LDP 的生长可以引入与欠配位 Pb 2+的强相互作用在钙钛矿薄膜的表面上完成处理不同类型的表面终止端的能力。改进后的设备效率提高了 24.07%（稳定效率为 23.25%），整体稳定性也得到了提高。这为推动基于铅基界面缺陷定向管理的钙钛矿光伏器件的实际应用开辟了方向。
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