Enhanced performances in inverted small molecule solar cells by Ag nanoparticles

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Small molecular solar cells (SMSCs) are promising for low-cost renewable energy.
• Improving the power conversion efficiency (PCE) of SMSCs is crucial for their commercial viability.
• Integration of nanomaterials offers a pathway to enhance solar cell performance.

Purpose of the Study:

• To investigate the effect of silver nanoparticles (Ag NPs) on the performance of inverted small molecular solar cells.
• To understand the mechanisms by which Ag NPs enhance the power conversion efficiency (PCE).
• To optimize the integration of Ag NPs for improved solar cell device performance.

Main Methods:

• Fabrication of inverted small molecular solar cells with and without Ag NPs.
• Thermal evaporation technique for depositing Ag NPs onto the ITO surface.
• Characterization of device performance, including power conversion efficiency (PCE).
• Analysis of enhanced light harvesting via localized surface plasmon resonance (LSPR).

Main Results:

• The optimized device with thermally evaporated Ag NPs achieved a PCE of 4.87%.
• This represents a 33% improvement in PCE compared to the reference device without Ag NPs.
• Enhanced electrical properties and light harvesting were observed due to Ag NP integration.

Conclusions:

• Silver nanoparticles effectively enhance the performance of inverted small molecular solar cells.
• The integration of Ag NPs improves both electrical properties and light absorption through LSPR.
• This study demonstrates a viable strategy for boosting solar cell efficiency using nanomaterials.