Two-dimensional triphenylene cored hole-transporting materials for efficient perovskite solar cells

Area of Science:

• Materials Science
• Renewable Energy
• Organic Electronics

Background:

• Perovskite solar cells (PSCs) are a promising photovoltaic technology.
• Efficient and stable hole-transporting materials (HTMs) are crucial for PSC performance.
• Spiro-OMeTAD is a widely used HTM but faces stability challenges.

Purpose of the Study:

• To develop novel organic hole-transporting materials for perovskite solar cells.
• To investigate the structure-property relationships of triphenylene-based HTMs.
• To compare the performance and stability of novel HTMs against spiro-OMeTAD.

Main Methods:

• Synthesis of two-dimensional triphenylene core-based organic materials with methoxyl-arylamine terminal units.
• Fabrication and characterization of perovskite solar cells utilizing the developed HTMs.
• Photovoltaic performance testing (efficiency, voltage, current) and long-term stability assessments.

Main Results:

• Successful synthesis of novel triphenylene-based HTMs, denoted as TPH-T.
• Perovskite solar cells incorporating TPH-T exhibited enhanced photovoltaic performance.
• TPH-T demonstrated superior operational stability compared to the benchmark spiro-OMeTAD.

Conclusions:

• The developed triphenylene-based HTMs offer a promising alternative to spiro-OMeTAD for PSCs.
• The molecular design incorporating a triphenylene core and specific terminal units is effective for enhancing PSC efficiency and stability.
• Further research into these materials could advance the commercial viability of perovskite solar technology.