A solution processed nanostructured p-type NiO electrode for efficient inverted perovskite solar cells

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Perovskite solar cells (PSCs) are a promising photovoltaic technology.
• Efficient hole transport layers (HTLs) are crucial for optimizing PSC performance.
• Developing scalable and cost-effective HTLs is essential for commercialization.

Purpose of the Study:

• To investigate nanostructured nickel oxide (NiO) as a solution-processed HTL for inverted PSCs.
• To evaluate the performance of PSCs utilizing NiO HTLs.
• To demonstrate a simple and cost-effective fabrication method.

Main Methods:

• Fabrication of nanostructured NiO films via a solution-processing technique.
• Integration of NiO as an HTL in inverted methylammonium lead iodide (MAPb(I_1-xBr_x)₃) perovskite solar cells (PSCs).
• Characterization of device performance, including power conversion efficiency (PCE), current density (J_SC), open-circuit voltage (V_OC), and fill factor (FF).

Main Results:

• The best performing inverted PSC achieved a power conversion efficiency of 15.35%.
• Achieved parameters include a current density (J_SC) of 19.85 mA cm^-2, an open-circuit voltage (V_OC) of 1.056 V, and a fill factor (FF) of 0.73.
• The developed NiO HTL is demonstrated to be effective for efficient PSCs.

Conclusions:

• Solution-processed nanostructured NiO is a viable and efficient HTL for inverted perovskite solar cells.
• The fabrication method is simple, cost-effective, and scalable.
• This approach contributes to the advancement of efficient and affordable perovskite solar technology.