Advanced Functional Materials

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  1. Silver Zeolite Composites-Based LEDs: A Novel Solid-State Lighting Approach

    Koen Kennes, Eduardo Coutino-Gonzalez, Cristina Martin, Wouter Baekelant, Maarten B. J. Roeffaers and Mark Van der Auweraer

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/adfm.201606411

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    The development of innovative, efficient, and cost-effective lighting sources is nowadays of paramount importance. This study describes for the first time the assembly and characterization of silver-exchanged zeolite-based light-emitting diodes (LEDs). A basic, single-layer organic LED architecture is employed in which silver exchanged zeolites are incorporated. The electroluminescence colors are controlled by the silver concentration in the zeolites.

  2. Solution-Processed Low Threshold Vertical Cavity Surface Emitting Lasers from All-Inorganic Perovskite Nanocrystals

    Yue Wang, Xiaoming Li, Venkatram Nalla, Haibo Zeng and Handong Sun

    Version of Record online: 21 FEB 2017 | DOI: 10.1002/adfm.201605088

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    All-inorganic halide perovskite nanocrystals (IPNCs) (CsPbX3, X = Cl, Br, I) based vertical cavity surface emitting laser is realized for the first time. These laser devices operate at a very low threshold, such that quasi-steady-state pumping is feasible. The results highlight the emerging CsPbX3 IPNCs as practical laser media and represent a significant leap toward practically desirable laser devices.

  3. Rapid Pseudocapacitive Sodium-Ion Response Induced by 2D Ultrathin Tin Monoxide Nanoarrays

    Minghua Chen, Dongliang Chao, Jilei Liu, Jiaxu Yan, Bowei Zhang, Yizhong Huang, Jianyi Lin and Ze Xiang Shen

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adfm.201606232

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    Flexible, binder-free electrode composed of 2D ultrathin (≈2.5 nm) SnO nanoflake arrays on graphene foam/carbon nanotubes foam is fabricated. Density functional theory calculation, quantitative capacitive analysis, and ex situ Raman and high-resolution transmission electron microscopy verify the role of pseudocapacitive contribution to high-rate Na+ storage and long-term cycle life of sodium ion battery.

  4. Reversible Programing of Soft Matter with Reconfigurable Mechanical Properties

    Huimin He, Xiaodong Cao, Hua Dong, Ting Ma and Gregory F. Payne

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adfm.201605665

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    Chitosan can be electrostatically cross-linked by sodium dodecyl sulfate micelles to confer viscoelastic properties under acidic conditions, but self-assembles into crystalline network junctions to confer elastic properties under basic conditions. These two cross-linking mechanisms can be spatially programed by printing technologies. The reversibility of these cross-linking mechanisms allows the patterned films to be erased and reprogramed with reconfigured mechanical properties.

  5. Recent Progress in High-Efficiency Blue-Light-Emitting Materials for Organic Light-Emitting Diodes

    Yirang Im, Seong Yong Byun, Ji Han Kim, Dong Ryun Lee, Chan Seok Oh, Kyoung Soo Yook and Jun Yeob Lee

    Version of Record online: 20 FEB 2017 | DOI: 10.1002/adfm.201603007

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    Developing highly efficient fluorescent, phosphorescent and thermally activated delayed fluorescent emitters has led to great advances in the device performances of blue organic light-emitting diodes after 2010. The recent progress of high-efficiency blue emitters is reviewed and an outlook for high-efficiency blue emitters is proposed.

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