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Due to their great potential in wearable and portable electronics, flexible perovskite solar cells (FPSCs) have been extensively studied. The major challenges in the practical ...applications of FPSCs are efficiency, operational stability, and mechanical stability. Herein, we developed a facile approach by incorporating a cross-linking oligomer of trimethylolpropane ethoxylate triacrylate (TET) into perovskite films to simultaneously enhance the power conversion efficiency (PCE) and stability of FPSCs. A PCE of 20.32% was achieved, which are among the best results for the inverted FPSCs. Both mechanical and environmental stabilities were improved for the TET-incorporated FPSCs. In particular, the PCE retained approximately 87% of its initial value after 20,000 bending cycles at a radius of 4 mm. The inverted FPSCs retained 85% of the initial PCE after 500 h storage at 85 °C and 90% after 900 h continuous one-sun illumination. A joint experiment–theory analysis ascribed the underlying mechanism to the reduced defect densities, improved crystallinity, and stability of the perovskite absorbers on flexible substrates caused by TET incorporation.
In this study, the cross-linking-type gel polymer electrolyte (GPE) was prepared using trimethylolpropane triacrylate and trimethylolpropane ethoxylate triacrylate and their electrochemical ...performances were evaluated. The ionic conductivity of the GPE at 20
°C was around 5 × 10
−3 ∼ 6 × 10
−3
S
cm
−1. The GPE had good electrochemical stability up to 4.5
V versus Li/Li
+. The electrochemical performance of TMPETA-based cell was better than that of TMPTA-based cell. The discharge capacity of the TMPETA-based cell at the 2.0
C rate was 98% of the discharge capacity at the 0.2
C rate. The discharge capacity of the TMPTA- and TMPETA-based cell was stable with the charge–discharge cycling
