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Updated: Jun 3, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Interface Molecular Locking Synergized with Self-Assembled Monolayers for Efficient Perovskite Solar Cells.
Xiang He1,2, Shantao Zhang1, Qi Wang2
1State Key Laboratory of Precision and Intelligent Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.
We developed an interface molecular locking (IML) strategy using enhanced self-assembled monolayers (E-SAMs) and thiabendazole to improve perovskite solar cell performance and stability. This method significantly boosts efficiency and voltage in inverted perovskite solar cells (IPSCs).
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Uniformity of self-assembled monolayers (SAMs) and interfacial defects are critical for inverted perovskite solar cell (IPSC) performance.
- Existing methods struggle to optimize the buried interface, limiting device efficiency and stability.
Purpose of the Study:
- To develop an innovative interface molecular locking (IML) strategy to enhance the buried interface properties of IPSCs.
- To improve the morphological coverage, energy level alignment, and reduce trap density in perovskite films for better device performance.
Main Methods:
- Employed two SAMs, (4-(3,6-dimethoxy-9H-carbazol-9-yl)phenyl)phosphonic acid (MeO-PhPACz) and 5-indoleboronic acid (5-IBA), to form an enhanced SAM (E-SAM).
- Incorporated thiabendazole (TBZ) additive into the perovskite precursor to further optimize the buried interface through self-assembly.
- Investigated the synergistic effects of E-SAM and TBZ on perovskite film crystallinity, trap density, and interfacial energy levels.
Main Results:
- The E-SAM exhibited denser and more uniform coverage due to π-π interactions between MeO-PhPACz and 5-IBA.
- TBZ additive further improved interface properties via self-assembly, enhancing energy level alignment and reducing trap density.
- Achieved high power conversion efficiencies exceeding 26.0% for both (FA0.95MA0.05)0.95Cs0.05Pb(I0.95Br0.05)3 and FA0.95Cs0.05PbI3-based IPSCs, with enhanced stability.
- Demonstrated a high open-circuit voltage of 1.21 V for (FA0.95MA0.05)0.95Cs0.05Pb(I0.95Br0.05)3 solar cells, a record for IPSCs with a 1.56 eV bandgap.
Conclusions:
- The synergistic IML strategy effectively engineers the buried interface, leading to significant improvements in IPSC performance and stability.
- This approach provides valuable insights for developing high-performance perovskite solar cells through advanced interface engineering.
