Organic spacer engineering of Ruddlesden-Popper perovskite materials toward efficient and stable solar cells

Xu，Jiamin1; Chen，Jiabang1,2; Chen，Shi3; Gao，Han1; Li，Yaru1; Jiang，Zhengyan1; Zhang，Yong1; Wang，Xingzhu1,4,5; Zhu，Xunjin2; Xu，Baomin1,6,7

2023-02-01

10.1016/j.cej.2022.139790

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

Organic spacers in the Ruddlesden-Popper perovskite (RPP) materials significantly enhance the operating stability of the corresponding solar cells, but limit their devices performance owing to inefficient charge transport. Inspired by 3D perovskites, binary spacer-based RPP devices show great potential in outperforming their unary spacer counterparts, yet it still lacks the rational design of RPP materials based on binary spacer from a molecular level to tune optoelectronic properties and device performance. Therefore, several novel binary spacer RPP films (F-PEAGA)MAPbI (x ≤ 0.3, F-PEA = 4-fluorophenethylammonium, GA = guanidinium, MA = methylammonium) are prepared to investigate the impact of binary spacer on film properties and device performance. By incorporating 20 % GA into F-PEAMAPbI, the as-prepared film becomes smoother with superior vertical alignment and larger-sized crystal grains, yielding an obvious reduction of trap density and better hole mobility, which more effectively inhibits the nonradiative recombination and accelerates the hole extraction. Consequently, an optimal efficiency of 17.50 % is achieved for the (F-PEAGA)MAPbI based device, among the highest values for binary spacer RPP (n ≤ 5) solar cells reported to date. Additionally, this device maintains 87 % and 90 % of its starting efficiency after 500 aging hours in ambient air and 1000 h tracking at the maximum power point under illumination, respectively.

Hydrophobicity Organic spacer Two-dimensional perovskite

English

First

National Key Research and Development Program of China[2021YFB3800100];National Key Research and Development Program of China[2021YFB3800101];

ENGINEERING

2-s2.0-85140253847

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Chemistry and Institute of Molecular Functional Materials,Hong Kong Baptist University,Kowloon Tong,Waterloo Road,Hong Kong
3.Henan Key Laboratory of Photovoltaic Materials,Henan University,Kaifeng,475004,China
4.Shenzhen Putai Technology Co.,Ltd,Shenzhen,518110,China
5.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
6.Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China
7.Key University,Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen,518055,China

Xu，Jiamin,Chen，Jiabang,Chen，Shi,et al. Organic spacer engineering of Ruddlesden-Popper perovskite materials toward efficient and stable solar cells[J]. CHEMICAL ENGINEERING JOURNAL,2023,453.

Xu，Jiamin.,Chen，Jiabang.,Chen，Shi.,Gao，Han.,Li，Yaru.,...&Xu，Baomin.(2023).Organic spacer engineering of Ruddlesden-Popper perovskite materials toward efficient and stable solar cells.CHEMICAL ENGINEERING JOURNAL,453.

Xu，Jiamin,et al."Organic spacer engineering of Ruddlesden-Popper perovskite materials toward efficient and stable solar cells".CHEMICAL ENGINEERING JOURNAL 453(2023).