Dopant-Free and Multifunctional Hole Transport Polymers in Perovskite Solar Cells with Nonaromatic Solvent Processing

다국어 초록 (Multilingual Abstract)

Recently, for the next-generation hole transport materials in perovskite solar cells (PSCs) requires multifunctionality as well as high efficiency and stability. We reported a high efficient hole transport alkoxy polymer, with lead capturing function and green solvent processing. The alkoxy group of the polymer is used on behalf of thiophene groups to enhance solubility in nonaromatic solvents, such as 3-methylcyclohexanone (3-MC). Moreover, approaching lead-capturable polymer is significant strategy, which a clever method compared to a strategy to convert lead-based perovskite into lead-free perovskite. The TEG groups of the polymer can Pb2+ to prohibit lead leakage, a problem that was needed to be solved because of toxicity. Therefore, a dopant-free and eco-friendly alkoxy polymer solar cell demonstrated high efficiency of 21.2% with 2-methyl anisole and 19.9% with 3-MC in TiO2 planar structure. The cell preserved reasonable stability of 88% after 30 days in room temperature.