Green-Solvent-Processable Hole Transport Polymers with Lead-Capturability in Perovskite Solar Cells
발표자
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초록
내용
As hole-transporting materials (HTM) of perovskite solar cells (PSCs) are developed, diverse functionalities are required for next-generation devices. A novel semiconducting polymer, alkoxy-PTEG, can be soluble even in nonaromatic and polar solvents, such as 3-methylcyclohexanone (3-MC), and can chelate with lead ion in perovskite which is harmful chemical. Finally, alkoxy-PTEG device without any dopants processed with 3-MC shows power conversion efficiency (PCE) of 19.9% and a device with 2-methyl anisole, which is also known as aromatic solvents, exhibits PCE of 21.2% in a tin oxide planar structure. The chelating ability of TEG groups with lead ions shows moderate strength (Kbinding = 2.76) which is measured by nuclear magnetic resonance. This is the first report providing the solutions of lead leakage.