4-(7H-Dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, 98%

Product Introduction

Self-assembled monolayer (SAM) materials are key interfacial functional materials in perovskite solar cells. By enabling effective interface defect passivation and efficient charge carrier transport, SAM materials play a critical role in improving photovoltaic performance, device stability, and scalable manufacturing feasibility.

Conventional organic SAM materials are often limited by weak carrier transport capability, insufficient chemical stability, and challenges in large-area processing, which have become major obstacles to further improving perovskite photovoltaic performance and accelerating industrial commercialization.

A novel SAM material, 4-(7H-Dibenzo【c,g】carbazol-7-yl)phenylphosphonic acid (Bz-PhpPACz), developed by the research team of Prof Xu, Zongxiang 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, providing multiple advantages including efficient defect passivation, enhanced charge transport, and improved fabrication of high-quality large-area perovskite films.

Key Advantages

High Photovoltaic Performance

Bz-PhpPACz enables high-efficiency perovskite solar cell fabrication 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 excellent performance retention with minimal efficiency degradation during scale-up.

Excellent Long-Term Stability

The SAM material significantly improves operational stability of perovskite solar cells.

• Passed over 3000 hours of continuous illumination aging testing under the ISOS-L-II protocol.
• Devices maintained more than 91% of their initial efficiency, demonstrating enhanced resistance against performance degradation.

Simplified Device Fabrication Process

Bz-PhpPACz provides a more efficient and scalable fabrication approach.

• Optimized concentration: 2.8 mM.
• Enables a single-step spin-coating process.
• Eliminates additional cleaning procedures, improving manufacturing efficiency and production yield.

Innovative Molecular Structure

The unique molecular design of Bz-PhpPACz promotes the formation of an ordered hydrophilic bilayer structure.

Key benefits include:

• Reduced interface defect density.
• Improved surface wettability for high-quality perovskite film formation.
• Enhanced interfacial charge extraction and transport efficiency.
• Improved compatibility with large-area perovskite device fabrication.

Applications

As an advanced hole-selective interfacial material, Bz-PhpPACz is widely applicable in next-generation 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 developing efficient, stable, and scalable photovoltaic and optoelectronic devices.

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Frequently Asked Questions (FAQ)

Q1: What is Bz-PhpPACz?

A: Bz-PhpPACz is an advanced self-assembled monolayer (SAM) material used as an interfacial functional layer in perovskite solar cells. It is designed to improve interface quality, reduce defect density, and enhance charge carrier extraction and transport between the electrode and perovskite active layer.

Q2: What are the main applications of Bz-PhpPACz?

A: Bz-PhpPACz is primarily used for perovskite solar cell research as a hole-selective interfacial material. It can also be applied in other advanced optoelectronic devices, including perovskite quantum dot light-emitting devices (PeQLEDs), organic photovoltaic devices (OPVs), and organic light-emitting diodes (OLEDs).

Q3: How does Bz-PhpPACz improve the performance of perovskite solar cells?

A: Bz-PhpPACz forms an ordered hydrophilic bilayer structure through enhanced intermolecular π–π interactions. This structure helps passivate interface defects, improve perovskite film quality, facilitate charge extraction, and reduce recombination losses, resulting in improved photovoltaic efficiency and stability.

Q4: What advantages does Bz-PhpPACz have compared with traditional SAM materials?

A: Compared with conventional organic SAM materials, Bz-PhpPACz offers improved molecular ordering, stronger intermolecular interactions, enhanced chemical stability, and better compatibility with large-area perovskite film fabrication. These advantages help overcome limitations related to charge transport, stability, and scalability.

Q5: Can Bz-PhpPACz be used for large-area perovskite solar cell fabrication?

A: Yes. Bz-PhpPACz has demonstrated excellent performance in both small-area and large-area perovskite solar cells. It supports high-quality perovskite film formation and maintains high device efficiency during scale-up, making it suitable for research toward scalable photovoltaic manufacturing.

Q6: What processing method is recommended for Bz-PhpPACz?

A: Bz-PhpPACz can be processed using a simple spin-coating method. An optimized concentration of 2.8 mM enables single-step coating without additional cleaning procedures, providing a simplified fabrication process for perovskite photovoltaic devices.

Q7: How does Bz-PhpPACz contribute to device stability?

A: By reducing interface defects and improving interfacial charge transport, Bz-PhpPACz helps suppress degradation pathways in perovskite solar cells. Devices incorporating this SAM material have demonstrated long-term operational stability under continuous illumination testing.

Q8: Is Bz-PhpPACz suitable for academic and industrial research?

A: Yes. Bz-PhpPACz is suitable for researchers working on perovskite photovoltaics, interface engineering, thin-film solar cells, and next-generation optoelectronic materials. It provides a promising material platform for both fundamental studies and scalable device development.

Q9: What type of devices can benefit from SAM-based interface engineering?

A: SAM-based interface engineering can improve various thin-film optoelectronic devices, including perovskite solar cells, tandem solar cells, quantum dot light-emitting devices, organic photovoltaic devices, and organic light-emitting devices.

Q10: What is the role of phosphonic acid groups in Bz-PhpPACz?

A: The phosphonic acid functional group enables strong chemical anchoring to metal oxide surfaces, such as ITO substrates, allowing the formation of stable self-assembled layers. This improves interface adhesion and facilitates efficient hole extraction in photovoltaic devices.