Retarding Ion Migration for Stable Blade-Coated Inverted Perovskite Solar Cells

Hongwei Zhu; Bingyao Shao; Jun Yin; Zhongjin Shen; Lijie Wang; Ren Wu Huang; Bin Chen; Nimer Wehbe; Taimoor Ahmad; Mutalifu Abulikemu; Aqil Jamal; Issam Gereige; Marina Freitag; Omar F. Mohammed; Edward H. Sargent; Osman M. Bakr

doi:10.1002/adma.202306466

Retarding Ion Migration for Stable Blade-Coated Inverted Perovskite Solar Cells

Hongwei Zhu, Bingyao Shao, Jun Yin, Zhongjin Shen, Lijie Wang, Ren Wu Huang, Bin Chen, Nimer Wehbe, Taimoor Ahmad, Mutalifu Abulikemu, Aqil Jamal, Issam Gereige, Marina Freitag, Omar F. Mohammed, Edward H. Sargent, Osman M. Bakr^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The fabrication of perovskite solar cells (PSCs) through blade coating is seen as one of the most viable paths toward commercialization. However, relative to the less scalable spin coating method, the blade coating process often results in more defective perovskite films with lower grain uniformity. Ion migration, facilitated by those elevated defect levels, is one of the main triggers of phase segregation and device instability. Here, a bifunctional molecule, p-aminobenzoic acid (PABA), which enhances the barrier to ion migration, induces grain growth along the (100) facet, and promotes the formation of homogeneous perovskite films with fewer defects, is reported. As a result, PSCs with PABA achieved impressive power conversion efficiencies (PCEs) of 23.32% and 22.23% for devices with active areas of 0.1 cm² and 1 cm², respectively. Furthermore, these devices maintain 93.8% of their initial efficiencies after 1 000 h under 1-sun illumination, 75 °C, and 10% relative humidity conditions.

Original language	English (US)
Article number	2306466
Journal	Advanced Materials
Volume	36
Issue number	9
DOIs	https://doi.org/10.1002/adma.202306466
State	Published - Mar 1 2024

Funding

H.Z. and B.S. contributed equally to this work. This work was supported Saudi Aramco and King Abdullah University of Science and Technology (KAUST). B.S. acknowledges funding support from the China Scholarship Council (No. 202006070004). J.Y. acknowledges financial support from Hong Kong Polytechnic University (Grant no. P0042930) and a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU25300823).

Keywords

blade coating
perovskite solar cells
retarding ion migration

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
General Materials Science

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10.1002/adma.202306466

Cite this

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abstract = "The fabrication of perovskite solar cells (PSCs) through blade coating is seen as one of the most viable paths toward commercialization. However, relative to the less scalable spin coating method, the blade coating process often results in more defective perovskite films with lower grain uniformity. Ion migration, facilitated by those elevated defect levels, is one of the main triggers of phase segregation and device instability. Here, a bifunctional molecule, p-aminobenzoic acid (PABA), which enhances the barrier to ion migration, induces grain growth along the (100) facet, and promotes the formation of homogeneous perovskite films with fewer defects, is reported. As a result, PSCs with PABA achieved impressive power conversion efficiencies (PCEs) of 23.32% and 22.23% for devices with active areas of 0.1 cm2 and 1 cm2, respectively. Furthermore, these devices maintain 93.8% of their initial efficiencies after 1 000 h under 1-sun illumination, 75 °C, and 10% relative humidity conditions.",

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AU - Zhu, Hongwei

AU - Shao, Bingyao

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AU - Shen, Zhongjin

AU - Wang, Lijie

AU - Huang, Ren Wu

AU - Chen, Bin

AU - Wehbe, Nimer

AU - Ahmad, Taimoor

AU - Abulikemu, Mutalifu

AU - Jamal, Aqil

AU - Gereige, Issam

AU - Freitag, Marina

AU - Mohammed, Omar F.

AU - Sargent, Edward H.

AU - Bakr, Osman M.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - The fabrication of perovskite solar cells (PSCs) through blade coating is seen as one of the most viable paths toward commercialization. However, relative to the less scalable spin coating method, the blade coating process often results in more defective perovskite films with lower grain uniformity. Ion migration, facilitated by those elevated defect levels, is one of the main triggers of phase segregation and device instability. Here, a bifunctional molecule, p-aminobenzoic acid (PABA), which enhances the barrier to ion migration, induces grain growth along the (100) facet, and promotes the formation of homogeneous perovskite films with fewer defects, is reported. As a result, PSCs with PABA achieved impressive power conversion efficiencies (PCEs) of 23.32% and 22.23% for devices with active areas of 0.1 cm2 and 1 cm2, respectively. Furthermore, these devices maintain 93.8% of their initial efficiencies after 1 000 h under 1-sun illumination, 75 °C, and 10% relative humidity conditions.

AB - The fabrication of perovskite solar cells (PSCs) through blade coating is seen as one of the most viable paths toward commercialization. However, relative to the less scalable spin coating method, the blade coating process often results in more defective perovskite films with lower grain uniformity. Ion migration, facilitated by those elevated defect levels, is one of the main triggers of phase segregation and device instability. Here, a bifunctional molecule, p-aminobenzoic acid (PABA), which enhances the barrier to ion migration, induces grain growth along the (100) facet, and promotes the formation of homogeneous perovskite films with fewer defects, is reported. As a result, PSCs with PABA achieved impressive power conversion efficiencies (PCEs) of 23.32% and 22.23% for devices with active areas of 0.1 cm2 and 1 cm2, respectively. Furthermore, these devices maintain 93.8% of their initial efficiencies after 1 000 h under 1-sun illumination, 75 °C, and 10% relative humidity conditions.

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Retarding Ion Migration for Stable Blade-Coated Inverted Perovskite Solar Cells

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