Efficient perovskite solar cells based on polyoxyethylene bis(amine) and NaPF6 modified SnO2 layer with high open-circuit voltage

IF 9 2区 材料科学 Q1 CHEMISTRY, PHYSICAL Materials Today Energy Pub Date : 2024-06-19 DOI:10.1016/j.mtener.2024.101630
Xiangning Xu, Zhichao Lin, Qili Song, Hairui Duan, Hongye Dong, Xiaowen Gao, Osamah Alsalman, Cheng Mu, Xinhua Ouyang
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Abstract

The electron transport layer (ETL) of SnO with a rough surface, low conductivity, and poor wettability has limited its application in perovskite solar cells (PSCs). To address this issue, we propose a strategy that involves the simultaneous use of bulk dopant NaPF and polymer stabilizer NH-PEG-NH in SnO. NH-PEG-NH is compatible with both SnO and NaPF, resulting in a homogeneous distribution. Additionally, the intrinsic hydrophilicity of the polymer facilitates the formation of a continuous and ordered ETL with improved wettability. The inclusion of NaPF as a bulk dopant enhances conductivity and promotes upper perovskite growth. As a result, optimized morphology, aligned energy levels, improved crystallinity, and reduced bottom defects are achieved in the fabricated perovskite layer. The champion device exhibits a power conversion efficiency (PCE) of ∼23.36%, which is ∼11.88% higher than that of the pristine device (PCE = 20.88%). Notably, the reaches ∼1.2 V with only ∼0.08 V of loss, which is among the highest report one. Furthermore, the PCE of the modified unpackaged PSC was only attenuated by 25% after 250 h of maximum power point tracking in the environment. These results present an alternative and effective approach for preparing high-quality SnO ETL for efficient PSCs.
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基于聚氧乙烯双(胺)和 NaPF6 修饰的具有高开路电压的二氧化硒层的高效过氧化物太阳能电池
氧化锡的电子传输层(ETL)表面粗糙、导电率低、润湿性差,这限制了它在过氧化物太阳能电池(PSC)中的应用。为解决这一问题,我们提出了一种在氧化锡中同时使用块状掺杂剂 NaPF 和聚合物稳定剂 NH-PEG-NH 的策略。NH-PEG-NH 与氧化锡和 NaPF 都兼容,因此分布均匀。此外,聚合物固有的亲水性有利于形成连续有序的 ETL,从而改善润湿性。加入 NaPF 作为块状掺杂剂可提高导电性并促进上部包晶的生长。因此,在制造的包晶层中实现了形态优化、能级对齐、结晶度提高和底部缺陷减少。冠军器件的功率转换效率(PCE)为 23.36%,比原始器件(PCE = 20.88%)高出 11.88%。值得注意的是,在达到 ∼1.2 V 时仅有 ∼0.08 V 的损耗,是目前报告中损耗最高的器件之一。此外,在环境中跟踪最大功率点 250 小时后,改进型无封装 PSC 的 PCE 仅衰减了 25%。这些结果为制备用于高效 PSC 的高质量氧化锡 ETL 提供了另一种有效的方法。
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来源期刊
Materials Today Energy
Materials Today Energy Materials Science-Materials Science (miscellaneous)
CiteScore
15.10
自引率
7.50%
发文量
291
审稿时长
15 days
期刊介绍: Materials Today Energy is a multi-disciplinary, rapid-publication journal focused on all aspects of materials for energy. Materials Today Energy provides a forum for the discussion of high quality research that is helping define the inclusive, growing field of energy materials. Part of the Materials Today family, Materials Today Energy offers authors rigorous peer review, rapid decisions, and high visibility. The editors welcome comprehensive articles, short communications and reviews on both theoretical and experimental work in relation to energy harvesting, conversion, storage and distribution, on topics including but not limited to: -Solar energy conversion -Hydrogen generation -Photocatalysis -Thermoelectric materials and devices -Materials for nuclear energy applications -Materials for Energy Storage -Environment protection -Sustainable and green materials
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