Creating an orthogonal printable hole-transporting layer (HTL) for large-area printed inverted polymer solar cells (PSCs) remains a significant challenge. This study introduces fluorine-functionalized reduced graphene oxide (FrGO) with varying sheet sizes (large: 1.1 μm, medium: 0.7 μm, small: 0.3 μm) and explores their impact on the hole transport properties of PSCs. The FrGOs demonstrated excellent dispersion stability in 2-propanol for over 90 days. Reducing the sheet size of FrGOs enhanced the hole-transporting properties, achieving power conversion efficiencies (PCEs) of 9.27% for PTB7-Thand 9.02% for PTB7-ThPSCs. This represents a 14% improvement over devices with PEDOTand surpasses the 8.77% PCE of devices with vacuum-deposited MoO3. The improved performance is due to better charge collection efficiency, reduced leakage current, lower internal resistance, and minimized charge recombination. Small-sized FrGO HTLs were successfully applied using spray coating, yielding PCEs of 9.22% and 13.26% for PTB7-Thand PM6PSCs, respectively.-Scientific Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
