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Showing 1–6 of 6 results
Advanced filters: Author: Devendra K. Sadana Clear advanced filters

  • Ultrathin film photovoltaic cells are a promising energy device, but suffer from low power conversion efficiency. Here, the authors construct a double-junction tandem cell using a hydrogenated amorphous silicon and a polymer as the front and back cell, respectively, which achieves 10.5% efficiency.

    • Jeehwan Kim
    • Ziruo Hong
    • Yang Yang
    Research
    Nature Communications
    Volume: 6, P: 1-6

  • Large-scale growth of single crystals on graphene can be useful for the development of 3D/2D or 2D/2D heterostructures. Here, through careful control of growth kinetics, the authors perform multiple cycles of direct growth/transfer of high-quality single-crystal GaN, using a single graphene/SiC substrate.

    • Jeehwan Kim
    • Can Bayram
    • Devendra K. Sadana
    Research
    Nature Communications
    Volume: 5, P: 1-7

  • The fabrication of electronic devices depends on semiconductor substrates for device growth. The etching technique implemented here by Cheng et al. allows the reuse of these substrates and suggests a more economic fabrication of electronic devices.

    • Cheng-Wei Cheng
    • Kuen-Ting Shiu
    • Devendra K. Sadana
    Research
    Nature Communications
    Volume: 4, P: 1-7

  • Indium tin oxide, the predominant material used as transparent electrodes in organic LEDs, is expensive and brittle. Ning Li and colleagues form transparent electrodes using single-layer graphene to construct organic LEDs with unprecedented performance that are suitable for both displays and lighting.

    • Ning Li
    • Satoshi Oida
    • Tze-Chiang Chen
    Research
    Nature Communications
    Volume: 4, P: 1-7

  • By using a single-quantum-well active region with a unique well–cladding design to suppress non-radiative recombination and enhance radiative recombination, light-emitting diodes with close to unity internal quantum efficiency at a low current density of <10−4 A cm−2 are demonstrated.

    • Ning Li
    • Kevin Han
    • Devendra Sadana
    Research
    Nature Photonics
    Volume: 13, P: 588-592