Thickness-Insensitive Anode Interface Layer for High-Efficiency Organic Solar Cells.
2021
Thickness-insensitive anode interface layer materials are extremely crucial for commercial applications of organic solar cells (OSCs). Here, we have demonstrated a solution-processed and thickness-insensitive anode interfacial layer PCPDT-2Ph-H and employed it in large-area OSCs. The power conversion efficiency (PCE) of a PM6:Y6 device with a 0.04 cm2 area using PCPDT-2Ph-H as the anode interface layer can reach 16.5%. More importantly, when the thickness of PCPDT-2Ph-H reaches 100 nm, a device with a 1.0 cm2 effective area can still achieve a high efficiency of 10.3%, which is highly favorable to large-area printing of OSCs. Due to its advantages of thickness insensitivity and solution processing, PCPDT-2Ph-H would be a promising anode interface layer for large-area OSCs.
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