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Molecularly Templated Buried Interfaces for Inverted Perovskite Solar Cells
Songyang Yuan1,2, Quanrun Qiu2, Huaiman Cao2,3
1School of Chemistry, Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Key Laboratory of Electronic Chemicals For Integrated Circuit Packaging, South China Normal University (SCNU), Guangzhou, China.
Angewandte Chemie (International Ed. in English)
|August 7, 2026
Summary
Engineers improved perovskite solar cells by controlling the buried interface using molecular templating. This boosts efficiency to 26.58% and enhances device stability.
Area of Science:
- Materials Science
- Renewable Energy
- Organic Electronics
Background:
- The buried interface between self-assembled monolayers (SAMs) and perovskite absorbers is crucial for inverted perovskite solar cells.
- Structural mismatch and poor control at this interface limit charge extraction and device stability.
Purpose of the Study:
- To engineer the buried interface in perovskite solar cells using non-covalent molecular templating.
- To improve charge extraction, energy-level alignment, and operational stability of inverted perovskite solar cells.
Main Methods:
- Utilized complementary triphenylamine-based molecular building blocks for non-covalent molecular templating.
- Introduced a triphenylamine-based ammonium salt (TPANI) into the perovskite precursor.
- Deposited a triphenylamine-based bisphosphonic acid SAM on ITO as the hole-selective layer.
Main Results:
- Non-covalent interactions induced molecular templating and interfacial organization of TPANI.
- Strengthened SAM/perovskite adhesion and reduced intergranular groove depth.
- Achieved a power conversion efficiency of 26.58% with a fill factor of 86.72% and enhanced operational stability.
Conclusions:
- Non-covalent molecular templating is an effective strategy for engineering buried interfaces in perovskite photovoltaics.
- The developed interface suppresses defects, improves energy-level alignment, and facilitates hole extraction.
- This approach leads to highly efficient and stable inverted perovskite solar cells.
