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Stereolithography is a promising way to produce customized 3D structures. It has been playing an irreplaceable role in the industry because of its high customization and fast prototyping capability. Many areas such as medical molding and product prototyping have achieved big success with stereolithography. Dentists have used stereolithography for dental implants, orthodontics and oral surgery.
A type of integrated photovoltaic system that can improve the performance of ultrathin silicon solar cells is demonstrated by synergistically exploiting light trapping nanostructures and plasmonically enhanced spectral upconversion. Ultrathin (∼8 µm) nanostructured silicon solar cells are embedded in a thin polymeric medium containing NaYF4:Yb3+,Er3+ upconversion nanocrystals coated on a nanostructured...
Epitaxially grown III–V compound semiconductors, such as gallium arsenide (GaAs), can provide superior photovoltaic (PV) performance due to many attractive material properties. However, the high cost of growing device-quality epitaxial materials has prevented their widespread adoption in terrestrial applications. In this regard, decreasing thicknesses of constituent epitaxial materials without compromising...
The cover image shows a stretchable photovoltaic module consisting of ultrathin, inorganic solar cells interconnected in mesh‐like geometries and mounted onto structured elastomeric substrates, as reported by Yonggang Huang, John A. Rogers, and co‐workers on p. 986. Mechanical deformations are accommodated by the flexible interconnects of the mesh and stretchable trenches of the substrate.
Strategies are presented for achieving, simultaneously, both large areal coverage and high stretchability by using elastomeric substrates with surface relief in geometries that confine strains at the locations of the interconnections, and away from the devices. The studies involve a combination of theory and experiment to reveal the essential mechanics, and include demonstrations of the ideas in stretchable...
We recently reported a strategy, in which modules consist of large-scale arrays of small, interconnected ultrathin (i.e. 1-20 ??m) Si microcells (??-cells) formed by anisotropic etching of bulk wafers and integrated with a soft printing technique. Here we report three new advances in this type of printed, ??-cell technology. First, we show that ??-cells formed with low purity, solar grade wafers (Dow...
Block copolymers (BCPs) have received great attention for the past 40 years but only within the past decade have they been seriously considered for nanotechnological applications. Their applicability to nanotechnology stems from the scale of the microdomains and the convenient tunability of size, shape, and periodicity afforded by changing their molecular parameters. The use of the tensorial physical...
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