Optimizing the Interface between Hole Transporting Material and Nanocomposite for Highly Efficient Perovskite Solar...

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cell performance is highly sensitive to device architecture and interfacial properties.
• The interface between perovskite layers and charge transporting materials critically influences film growth, morphology, and charge extraction/recombination.

Purpose of the Study:

• To engineer the interface between a perovskite-polymer nanocomposite and various polymeric hole transporters.
• To investigate the impact of Poly-TPD molecular weight on inverted planar perovskite solar cell performance.

Main Methods:

• Fabrication of inverted planar perovskite solar cells using a perovskite-polymer nanocomposite.
• Testing different hole transporting materials: PEDOT:PSS, PEDOT, PTAA, and Poly-TPD.
• Systematic variation of Poly-TPD molecular weight to assess its effect on device performance.

Main Results:

• Using Poly-TPD as the hole transfer material improved perovskite film morphology.
• Enhanced perovskite film quality suggests improved interfacial contact between Poly-TPD and the perovskite layer.
• Increasing the molecular weight of Poly-TPD led to enhanced photovoltaic performance.

Conclusions:

• Poly-TPD is a promising hole transporting material for perovskite solar cells due to its positive impact on film morphology and device efficiency.
• The molecular weight of Poly-TPD is a critical parameter for optimizing perovskite solar cell performance.
• Optimized Poly-TPD in an inverted planar architecture achieved a power conversion efficiency of 16.3%.