Triazine-based porous organic polymers for building electron transport pathways in perovskite solar cells
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초록
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Porous organic polymers materials are three-dimensional structures formed through covalent bonds and have been applied in various fields by inducing effective charge extraction via large contact areas. In this study, by adjusting the synthetic strategy for porous organic polymers, excellent soluble, hypertonic and crosslinked polymers with triazine ring-based alkyl-modified perylene motifs (T-POP) were produced. Because of the large surface area of this polymer, the frequency of intermolecular contact between optically active units, such as the perylene motif of the skeleton, increases and the π-π stacking becomes stronger. The T-POP interlayer improves the morphology of the PC70BM layer in inverted perovskite solar cells, inducing efficient current flow and stack three-dimensional vertical structures to form electron carrier pathways. As a result, the power conversion efficiency of the T-POP applied device was increased by 13% and the stability of the device was improved.