In this research, we focus on the PEDOT:PSS materials, which is widely utilized in the field of organic electronics. First, we applied customized transfer of PEDOT:PSS to inter-layer in planer-type perovskite photovoltaics. The transfer-printed PEDOT:PSS layer led to the favorable crystallinity of perovskite Especially, the better stability resulted from the preserved crystallinity, and the inhibition of the ITO degradation. Second, we fabricated a pH-controlled PEDOT:PSS adjusted by imidazole. The neutral PEDOT:PSS revealed superior and very consistent performance for various active area sizes due to the uniformity of the perovskite crystals. The stability also was enhanced by preventing degradation by strong acid. Finally, a hybrid of PEDOT:PSS and copper chalcogenide nanoparticles (NPs) was used for organic photodiode. Since the NPs formed energy barrier in PEDOT:PSS, the dark current of the device was remarkably suppressed, with excellent detectivity.
Porous organic polymers (POP) materials are two and three-dimensional structures formed through covalent bonds and lead to effective charge extraction through large contact areas [1,2]. In this study, by adjusting the synthetic strategy for porous organic polymers (T-POP), soluble, hypertonic and crosslinked polymers with alkyl-modified perylene motifs were produced [3]. As the surface area of this polymer expands, the frequency of contact of molecules between optically active units, such as the perylene motifs of the framework, increases, and π-π stacking becomes stronger. Facilitated charge carrier transport in inverted perovskite solar cells. The T-POP interlayer improves the morphology of the surface on the PC70BM layer to induce smooth current flow and builds an electron carrier pathway by stacking a three-dimensional vertical structure. As a result, the stability of the device was increased by T-POP, and the power conversion efficiency of the applied device was increased by 13%.
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