Improved Device Performance and Stability in Organic Solar Cells via Morphology Control Using Size-Controlled Chevron-Shaped Blades
발표자
()
초록
내용
Organic solar cells (OSCs) have been studied widely as renewable energy resources for a few decades owing to their own technological advantages including low cost, lightweight, flexibility, and the potential of large area printing. Recently, various studies in large-area OSCs have reported devices with high power conversion efficiency (PCE) and long-term stability through solution-processed scalable coating methods. Herein, we demonstrated a simple and straightforward strategy introducing two types of size controlled-chevron (V)-shaped blades to control PM6:Y6-based bulk-heterojunction (BHJ) films. This approach is effective not only in controlling the morphology of BHJ films efficiently in a macroscopic view but also aligning the molecules in a microscopic view. We obtained an improved photovoltaic performance achieving a PCE of 15.3% from the blade coating using a small-sized V-shaped blade, compared to 14.3% from that using the conventional flat blade. It leads to decreased trap-assisted recombination and leakage current, finally increasing short circuit current and fill factor.