Harmonizing the bilateral bond strength of the interfacial molecule in perovskite solar cells

IF 49.7 1区 材料科学 Q1 ENERGY & FUELS
Qiuyang Li, Hong Liu, Cheng-Hung Hou, Haoming Yan, Shunde Li, Peng Chen, Hongyu Xu, Wen-Yi Yu, Yiping Zhao, Yanping Sui, Qixuan Zhong, Yongqiang Ji, Jing-Jong Shyue, Shuang Jia, Bo Yang, Pengyi Tang, Qihuang Gong, Lichen Zhao, Rui Zhu
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Abstract

Interfacial molecules have been demonstrated to improve the photovoltaic performance of perovskite solar cells (PSCs). However, the effect is influenced by the targeted substrate and, in particular, by its bond with the interfacial molecule. A weaker bonding of the interfacial molecule with the substrate usually implies a stronger bonding with the perovskite that could lead to uncontrollable insertion of the interfacial molecule into the perovskite bulk, resulting in device degradation. Here we select bis(2-aminoethyl) ether (BAE) as the interfacial molecule between the perovskite and the electron transport layer (ETL) in n–i–p PSCs and develop a strategy to harmonize the strength of the bilateral bonds of BAE. In particular, we manipulate the electronic structure of the ETL with doping to increase the strength of the BAE–ETL bond. This thereby results in a weakening of the BAE–perovskite bond. The harmonization in bilateral bonds of the interfacial molecule leads to PSCs with an efficiency surpassing 26.5% (certified as 26.31%) and improved stability. The interfaces in perovskite solar cells are critical to the device performance. Li et al. tune the bond strength of the interfacial molecule with the perovskite and the electron transport layer, increasing the power conversion efficiency of the cells.

Abstract Image

Abstract Image

协调过氧化物太阳能电池中界面分子的双边键强度
事实证明,界面分子可以提高过氧化物太阳能电池(PSCs)的光伏性能。然而,这种效果受到目标衬底的影响,特别是受到衬底与界面分子结合力的影响。界面分子与衬底的结合力较弱,通常意味着与包晶的结合力较强,这可能导致界面分子无法控制地插入到包晶块体中,从而导致器件降解。在此,我们选择双(2-氨基乙基)醚(BAE)作为 ni-i-p PSC 中包晶石与电子传输层(ETL)之间的界面分子,并开发了一种协调 BAE 双边键强度的策略。特别是,我们通过掺杂来操纵 ETL 的电子结构,从而提高 BAE-ETL 键的强度。这就导致 BAE-perovskite 键的减弱。界面分子双边键的协调使 PSC 的效率超过 26.5%(经认证为 26.31%),并提高了稳定性。
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来源期刊
Nature Energy
Nature Energy Energy-Energy Engineering and Power Technology
CiteScore
75.10
自引率
1.10%
发文量
193
期刊介绍: Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies. With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector. Maintaining the hallmark standards of the Nature brand, Nature Energy boasts a dedicated team of professional editors, a rigorous peer-review process, meticulous copy-editing and production, rapid publication times, and editorial independence. In addition to original research articles, Nature Energy also publishes a range of content types, including Comments, Perspectives, Reviews, News & Views, Features, and Correspondence, covering a diverse array of disciplines relevant to the field of energy.
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