Self-assembled monolayer (SAM) materials are critical interfacial functional materials in perovskite solar cells (PSCs). By enabling effective interface defect passivation and efficient charge carrier transport, SAM materials directly influence photovoltaic performance, device stability, and the scalability of perovskite solar cell manufacturing, making them essential materials for commercializing next-generation photovoltaic technologies.
However, conventional organic SAM materials face three major challenges: limited charge transport capability, insufficient chemical stability, and difficulties in large-area fabrication. These limitations have become key barriers to further improving perovskite device efficiency and accelerating large-scale production.
A novel SAM material, 4-(7H-Dibenzo{c,g}carbazol-7-yl)phenyl)phosphonic acid, 98% (Bz-PhpPACz), developed by the research team led by Professor Zongxiang Xu at Southern University of Science and Technology, overcomes the limitations of traditional monolayer structures.
Through enhanced intermolecular π–π interactions, Bz-PhpPACz forms an ordered hydrophilic bilayer structure on the substrate surface, delivering three major advantages:
- Efficient interface defect passivation
- Enhanced charge carrier transport
- High-quality large-area perovskite film fabrication
This innovative molecular design provides an effective solution to the key challenges limiting high-performance and scalable perovskite photovoltaic devices.
Key Breakthroughs
High Photovoltaic Efficiency
Bz-PhpPACz enables excellent photovoltaic performance across different device scales.
- Certified power conversion efficiency (PCE) of 26.39% for small-area devices (0.0715 cm²).
- Achieved 25.44% efficiency for large-area devices (1 cm²).
- Demonstrated minimal efficiency loss during scale-up, maintaining outstanding performance from laboratory-scale to larger-area devices.
Outstanding Long-Term Stability
Bz-PhpPACz significantly improves the operational stability of perovskite solar cells.
- Devices maintained over 91% of their initial efficiency after more than 3000 hours of continuous illumination aging testing under the ISOS-L-II standard.
- The enhanced stability addresses the limitations of conventional SAM materials under long-term operating conditions.
Simplified Fabrication Process
Bz-PhpPACz enables a more efficient and scalable device fabrication approach.
- Optimized processing concentration: 2.8 mM.
- Compatible with a one-step spin-coating process.
- Requires no additional cleaning procedure, improving fabrication efficiency, process simplicity, and production yield.
Innovative Molecular Structure
The unique molecular structure of Bz-PhpPACz promotes the formation of an ordered hydrophilic bilayer interface.
Key structural advantages include:
- Reduced interface defect density.
- Improved surface wettability for high-quality perovskite film formation.
- Enhanced interfacial charge extraction and transport efficiency.
- Better compatibility with large-area perovskite photovoltaic fabrication.
Applications of Bz-PhpPACz SAM Material
As an advanced hole-selective interfacial material, Bz-PhpPACz can be widely applied in emerging optoelectronic devices, including:
- Perovskite solar cells (PSCs)
- Perovskite quantum dot light-emitting devices (PeQLEDs)
- Organic photovoltaic devices (OPVs)
- Organic light-emitting diodes (OLEDs)
Bz-PhpPACz provides a high-performance interface engineering solution for researchers and developers working on efficient, stable, and scalable optoelectronic devices.
Related Product
Cat No.: 9426721 Bz-PhpPACz Cas: 3046309-18-3
艳 李
