Related Experiment Video
Updated: Apr 26, 2026
10:31
Developing High Performance GaP/Si Heterojunction Solar Cells
Published on: November 16, 2018
6.7K
Uniform and ordered self-assembled hole-selective layers driven by π-π interactions for efficient perovskite-silicon
Ming Luo1,2, Zhou Liu3, Qi Huang1
1State Key Laboratory of Photovoltaic Science and Technology, Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, College of Future Information Technology, Fudan University, Shanghai, China.
Nature Communications
|April 24, 2026
Summary
A new self-assembled molecule (SAM), Me-Ph2mPACz, enhances perovskite tandem solar cell performance by creating uniform, ordered layers. This boosts efficiency and stability for next-generation photovoltaics.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Self-assembled molecules (SAMs) are crucial for high-performance perovskite tandem solar cells.
- Inhomogeneous SAM distribution causes interfacial energy losses, hindering efficiency and stability.
Purpose of the Study:
- To design a novel SAM, Me-Ph2mPACz, for improved hole-selective layers.
- To enhance uniformity, order, and thermal resistance of SAMs for perovskite solar cells.
Main Methods:
- Meta-disubstitution of dimethylcarbazole moieties on a phenyl linker to create Me-Ph2mPACz.
- Characterization of SAM adsorption, intermolecular interactions, and film morphology.
- Fabrication and testing of perovskite solar cells and perovskite-silicon tandem solar cells.
Main Results:
- Me-Ph2mPACz shows stronger adsorption and suppresses micelle formation, leading to uniform, ordered, and thermoresistant layers.
- Reduced interfacial non-radiative losses from 168 mV to 124 mV in 1.68 eV perovskite solar cells.
- Achieved a champion power conversion efficiency (PCE) of 33.40% for perovskite-silicon tandem solar cells (certified 32.45%).
- Demonstrated exceptional device stability, retaining 83% efficiency after 1000 hours under stress conditions.
Conclusions:
- Me-Ph2mPACz effectively minimizes interfacial losses and enhances charge extraction in perovskite tandem solar cells.
- The designed SAM promotes superior device performance and long-term operational stability.
- This work provides a new strategy for developing advanced SAMs for efficient and durable perovskite photovoltaics.
