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The Future of Flexible Organic Solar Cells
摘要： Extensive efforts have been devoted during the last decade to organic solar cell research that has led to remarkable progress and achieved power conversion efficiencies (PCEs) in excess of 10%. Among the existing flexible organic solar cells, ultrathin organic solar cells with a total thickness <10 μm have important advantages, including good mechanical bending stabilities and good conformability. These advantages have led to power generation solutions for wearable electronics. In this essay, the progress of flexible and ultrathin organic solar cells, and the future research directions pertaining to these cells are discussed based on the potential applications of textile-compatible solar cells. Both process engineering and development of the material of ultrathin substrate films have improved the PCE of ultrathin organic solar cells, which in turn have led to the small PCE difference between flexible organic solar cells with substrate thickness >10 μm and ultrathin organic solar cells with substrate thickness ≤10 μm. Key technologies for the further improvement of PCE of flexible/ultrathin organic solar cells are discussed. Strategies to improve the stability and some important aspects, which determine the mechanical robustness of flexible organic solar cells, are also presented and discussed.
关键词： organic solar cells,flexibility,stretchability,power conversion efficiency
更新于2025-09-23 15:21:01
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Contents: (Adv. Funct. Mater. 36/2018)
摘要： In article number 1800802, Hyunjoo J. Lee and co-workers present a calcium-modified silk fibroin film as a strong adhesive for next-generation epidermal electronics. The modified silk film exhibits viscoelastic properties and can mechanically interlock a sensor and the skin surface ~20 times stronger than commercial alternatives. Additional interesting characteristics, such as good biocompatibility, reusability, stretchability, and conductivity show promise for widespread application.
关键词： epidermal electronics,biocompatibility,conductivity,silk fibroin,reusability,stretchability
更新于2025-09-23 15:21:01
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Stretchability and compressibility of a novel layout design for flexible electronics based on bended wrinkle geometries
摘要： A novel bended wrinkle structure is proposed for layout design in flexible electronics, which is formed by compressive local buckling of the thin film bonded onto a pre-strained, finite-thickness substrate upon release of the pre-strain. The excellent performance of stretchability of this structure, which could be as high as 309%, is shown according to theoretical analyses and validated by finite element method (FEM). Furthermore, the maximum strain of the proposed design is examined to ensure reliability of application devices. Except for the approach to compressibility based on maximum strain analyses, the bended wrinkle structure is taken as a laminate with geometrical imperfections and buckling analyses are conducted to obtain the critical buckling loads, consequently another evaluation criterion for compressibility is established. It is also revealed that the stretchability can be further enhanced by bonding the two ends of the structure to another pre-strained compliant basal substrate, though the pre-strain for the basal substrate is restricted by the compressibility. In the current work, an alternative to existing planar wavelike layout designs is presented and the results obtained offer important design guidelines for future applications.
关键词： Stretchability,Wrinkles,Compressibility,Buckling,Layout design,Flexible electronics
更新于2025-09-10 09:29:36