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Updated: Jan 18, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Molecular Hybrid Bridging for Efficient and Stable Inverted Perovskite Solar Cells without a Pre-Deposited Hole
Zhiguo Nie1, Weiwei Meng1, Shimin Peng1
1Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P. R. China.
A new molecular hybrid strategy optimizes perovskite/ITO contacts in perovskite solar cells (PSCs) by preventing molecular aggregation. This enhances hole transport and device efficiency, achieving a 26.64% power conversion efficiency.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Low-resistance perovskite/ITO contacts are vital for efficient hole transport in perovskite solar cells (PSCs) without hole-transporting layers.
- Self-assembled molecules (SAMs) at buried interfaces often suffer from nonuniform distribution and aggregation, causing energy loss.
Purpose of the Study:
- To develop a molecular hybrid bridging strategy for optimizing the buried interface in PSCs.
- To improve hole transport and device performance by preventing SAM aggregation.
Main Methods:
- Incorporation of (2-aminothiazole-4-yl)acetic acid (ATAA) and 4-(2,7-dibromo-9,9-dimethylacridin-10(9H)-yl)butyl)phosphonic acid (DMAcPA) into the perovskite precursor.
- Analysis of molecular distribution and interface formation using composition analysis.
- Fabrication and testing of inverted PSCs with the optimized interface.
Main Results:
- Both ATAA and DMAcPA were effectively extruded to the perovskite layer's bottom, forming a well-oriented, hole-selective contact with the ITO substrate.
- The molecular hybrid strategy, facilitated by ATAA's small size and intermolecular interactions, ensured uniform dispersion, suppressed aggregation, and enhanced hole-transporting efficiency.
- The optimized inverted PSC achieved a power conversion efficiency of 26.64% (certified 26.34%) and demonstrated excellent operational stability, retaining 98.5% efficiency after 1000 hours.
Conclusions:
- The molecular hybrid bridging strategy effectively optimizes the perovskite/ITO buried interface by promoting uniform molecular arrangement and suppressing aggregation.
- This approach significantly enhances hole transport and device performance, leading to high power conversion efficiency and improved stability in perovskite solar cells.
- The study presents a promising method for fabricating efficient and stable perovskite solar cells through interface engineering.
