Modification at ITO/NiO_x Interface with MoS₂ Enables Hole Transport for Efficient and Stable Inverted Perovskite...

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Inverted perovskite solar cells (IPSCs) show promise but face challenges with nickel oxide (NiOx) hole transport material's low conductivity and inefficient charge transport.
• Interface engineering is crucial for improving IPSC performance.

Purpose of the Study:

• To enhance the indium tin oxide (ITO)/NiOx interface in IPSCs using molybdenum disulfide (MoS2) nanoparticles.
• To improve hole transport, conductivity, and overall device performance and stability.

Main Methods:

• Incorporation of MoS2 nanoparticles at the ITO/NiOx interface.
• Characterization of the modified interface, including Ni3+:Ni2+ ratio, energy level alignment, and defect reduction.
• Fabrication and testing of IPSCs with and without the MoS2 modification.

Main Results:

• MoS2 modification optimized the ITO/NiOx interface, enhancing conductivity and promoting hole transport.
• Achieved a champion power conversion efficiency (PCE) of 21.42% for MoS2-modified IPSCs, compared to 20.25% for unmodified devices.
• Improved stability of unencapsulated IPSCs under various environmental conditions (thermal, light, humidity, ambient).

Conclusions:

• MoS2 nanoparticle integration at the ITO/NiOx interface is an effective strategy for developing highly efficient and stable IPSCs.
• This interface modification facilitates superior hole transport and defect passivation.
• The approach offers valuable insights for future interface engineering in perovskite solar cells.