Hole-Transporting Self-Assembled Monolayer Enables Efficient Single-Crystal Perovskite Solar Cells with Enhanced Stability

Khulud Almasabi, Xiaopeng Zheng, Bekir Turedi, Abdullah Y. Alsalloum, Muhammad Naufal Lintangpradipto, Jun Yin, Luis Gutiérrez-Arzaluz, Konstantinos Kotsovos, Aqil Jamal, Issam Gereige, Omar F. Mohammed*, Osman M. Bakr*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The difficulty of growing perovskite single crystals in configurations suitable for efficient photovoltaic devices has hampered their exploration as solar cell materials, despite their potential to advance perovskite photovoltaic technology beyond polycrystalline films through markedly lower defect densities and desirable optoelectronic properties. While polycrystalline film absorbers can be deposited on myriad substrates, perovskite single crystals fit for high-efficiency devices have only been demonstrated on hydrophobic hole-transport layers [HTLs, e.g., poly(triaryl amine) (PTAA)], which has severely restricted the avenues for enhancing device efficiency and stability. Herein, we report the growth of mixed-cation FA0.6MA0.4PbI3 perovskite single crystals on a hydrophilic self-assembled monolayer {SAM, [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic acid), (MeO-2PACz)} HTL surface. Compared with PTAA, the MeO-2PACz SAM promotes the mechanical adhesion of the perovskite on the substrate, enabling the fabrication of inverted solar cells with substantially enhanced operational stability and power conversion efficiencies of up to 23.1%, setting a new benchmark for single-crystal perovskite solar cells.

Original languageEnglish (US)
Pages (from-to)950-956
Number of pages7
JournalACS Energy Letters
Issue number2
StatePublished - Feb 10 2023

Bibliographical note

Funding Information:
The authors acknowledge funding support from KAUST and Saudi Aramco. The authors acknowledge the use of KAUST Core Lab and KAUST Solar Center facilities.

Publisher Copyright:
© 2023 American Chemical Society.

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


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