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Layer-by-Layer-Processed All-Polymer Solar Cells with Enhanced Performance Enabled by Regulating the Microstructure
Yixuan Wu1, Peng Li1, Shiqi Yu1
1School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China.
Molecules (Basel, Switzerland)
|June 27, 2024
Summary
Layer-by-layer fabrication with additives enhances organic solar cell performance. This method optimizes microstructure, reduces recombination, and achieves a 15.07% power conversion efficiency for all-polymer solar cells.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Layer-by-layer (LBL) fabrication offers precise control over microstructure and component distribution for large-scale organic solar cells (OSCs).
- All-polymer solar cells (all-PSCs) are promising for flexible and low-cost energy applications.
Purpose of the Study:
- To investigate the use of LBL fabrication with polymer donors (D18) and acceptors (PYIT-OD) for all-PSCs.
- To evaluate the impact of additive engineering on the active layer microstructure and photovoltaic performance.
Main Methods:
- Fabrication of all-PSCs using the layer-by-layer (LBL) method with D18 and PYIT-OD polymers.
- Morphological studies to analyze the active layer microstructure.
- Performance characterization of the fabricated solar cells, including power conversion efficiency (PCE).
Main Results:
- Additive use optimized the active layer microstructure, improving crystallinity and charge transport.
- An optimized device with 2% CN additive showed reduced bimolecular and trap-assisted recombination.
- All-PSCs fabricated via LBL achieved a PCE of 15.07%.
Conclusions:
- Additive engineering combined with LBL fabrication is effective in controlling active layer morphology.
- This approach significantly enhances the photovoltaic performance of all-polymer solar cells by suppressing charge recombination.
