Vacuum Processability of Self-Assembled Monolayers and Their Chemical Interaction with Perovskite Interfaces

Hyeji Han, Siwon Yun, Zobia Irshad, Wonjong Lee, Min Kim (), Jongchul Lim () and Jinseck Kim ()
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Hyeji Han: Graduate School of Energy Science & Technology, Chungnam National University, Daejeon 34134, Republic of Korea
Siwon Yun: Graduate School of Energy Science & Technology, Chungnam National University, Daejeon 34134, Republic of Korea
Zobia Irshad: Graduate School of Energy Science & Technology, Chungnam National University, Daejeon 34134, Republic of Korea
Wonjong Lee: Graduate School of Energy Science & Technology, Chungnam National University, Daejeon 34134, Republic of Korea
Min Kim: Department of Chemical Engineering, Center for Innovative Chemical Processes, Institute of Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea
Jongchul Lim: Graduate School of Energy Science & Technology, Chungnam National University, Daejeon 34134, Republic of Korea
Jinseck Kim: Department of Polymer-Nano Science and Technology, Jeonbuk National University, Jeonju 54896, Republic of Korea

Energies, 2025, vol. 18, issue 7, 1-22

Abstract: Self-assembled monolayers (SAMs) have gained significant attention as an interfacial engineering strategy for perovskite solar cells (PSCs) due to their efficient charge transport ability and work function tunability. While solution-based methods such as dip-coating and spin-coating are widely used for SAM deposition, challenges such as non-uniform coverage, solvent contamination, and limited control over molecular orientation hinder their scalability and reproducibility. In contrast, vacuum deposition techniques, including thermal evaporation, overcome these limitations by enabling the formation of highly uniform materials with precise control over thickness and molecular arrangement. Importantly, the chemical interactions between SAM materials and perovskite layers, including coordination bonding with Pb 2+ ions, play an important role in passivating surface defects, modulating energy levels, and promoting uniform perovskite crystallization. These interactions not only enhance wettability but also improve the overall quality and stability of perovskite films. This review highlights the advantages of vacuum-deposited SAMs, promoting strong chemical interactions with perovskite layers and improving interfacial properties critical for scalable applications.

Keywords: perovskite; self-assembled monolayer; evaporation; interface properties; chemical interaction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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