TEOS modification for improved performance in perovskite solar cells: addressing the interface defects and charge transfer issues of SnO2ETL.

IF 2.9 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Nanotechnology Pub Date : 2024-11-05 DOI:10.1088/1361-6528/ad7e32
Murat Ebic
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Abstract

The remarkable advancements in performance and rapid progress of perovskite solar cells (PSCs) in recent years have captured the interest of the photovoltaics (PVs) community. Nevertheless, defects occurring at the interface between the electron transporting layer (ETL) and perovskite, along with issues related to charge transfer, significantly impede the PV efficiency of these cells. In this study, we investigated the impact of tetraethyl orthosilicate (TEOS) on charge transfer and defect states at the interface by incorporating varying concentrations of TEOS into the SnO2ETL and modifying the interface between the ETL and perovskite. This process can passivate the defects at the ETL/perovskite (Cs0.05(FA0.85MA0.15)0.95Pb(I0.85Br0.15)3) interface and significantly extend the carrier lifetime. Moreover, TEOS modification plays a promising role in the growth kinetics of the perovskite films. As a result, a power conversion efficiency (PCE) of 20.0% was achieved with admissible phase stability in the presence of TEOS as dopant in SnO2ETL, while only 17.64% PCE was obtained for TEOS-free control structure. A promising PCE of 19.93% was achieved for ETL/TEOS/perovskite interface modification. This study presents a promising solution to address interface defects and charge transfer issues, which represent significant obstacles to the commercial scalability of PSCs.

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改性 TEOS 以提高过氧化物太阳能电池的性能:解决二氧化锡 ETL 的界面缺陷和电荷转移问题。
近年来,包晶体太阳能电池(PSCs)在性能上的显著进步和快速发展吸引了光伏界的兴趣。然而,电子传输层(ETL)与过氧化物之间的界面缺陷以及与电荷转移相关的问题极大地阻碍了这些电池的光电效率。在这项研究中,我们通过在二氧化锡电子传输层(ETL)中加入不同浓度的正硅酸四乙酯(TEOS)并改变 ETL 与包晶之间的界面,研究了正硅酸四乙酯对电荷转移和界面缺陷状态的影响。这一过程可以钝化 ETL/包晶界面上的缺陷,并显著延长载流子的寿命。此外,TEOS 改性在包晶体薄膜的生长动力学中也发挥了重要作用。因此,在含有 TEOS 作为掺杂剂的 SnO2 ETL 中,实现了 20.0% 的功率转换效率(PCE)和可接受的相稳定性,而在不含 TEOS 的控制结构中仅获得了 17.64% 的 PCE。ETL/TEOS/perovskite 界面改性的 PCE 达到了 19.93%。这项研究为解决界面缺陷和电荷转移问题提供了一种很有前景的解决方案,而这些问题是 PSCs 商业化可扩展性的重大障碍。
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来源期刊
Nanotechnology
Nanotechnology 工程技术-材料科学:综合
CiteScore
7.10
自引率
5.70%
发文量
820
审稿时长
2.5 months
期刊介绍: The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.
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