Halogen-free Solvent-Processed Pseudo-Planar Heterojunction Solar Cells with Outstanding Power Conversion Efficiency of 17.55%
발표자
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초록
내용
Chemical modifications of non-fullerene acceptors (NFAs) and halogen-free solvent processes play vital roles in the development of organic solar cells (OSCs). In this study, we have developed new, halogen-free solvent-processable NFA (BTA-UD-4F) with undecyl side chain on thienothiophene moiety. Thus, affording high-performance OSCs with O-xylene processed active layers. Also, BTA-UD-4F (PM6:BTA-UD-4F, efficiency: 14.32%) was achieved higher absorption co-efficient, charge carrier mobility, enhanced solubility, suppressed charge recombination as well as good compatible with host blend (PM6:Y7, efficiency:15.10%). As a result, BTA-UD-4F can help attain an impressive efficiency PCE of 17.55%, by pseudo-planar heterojunction (P-PHJ) OSCs. Our results demonstrate the huge research potential for P-PHJ architecture to be used for future OSCs applications.