Advanced Functional Materials

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  1. Highly Robust Bendable Oxide Thin-Film Ts on Polyimide Substrates via Mesh and Strip Patterning of Device Layers

    Suhui Lee, Daun Jeong, Mallory Mativenga and Jin Jang

    Version of Record online: 23 JUN 2017 | DOI: 10.1002/adfm.201700437

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    Extremely stable high-performance a-IGZO thin-film transistors (TFT) on plastic substrates are achieved by splitting S/D/G electrodes and the active semiconductor layer. When the S/D/G electrodes are patterned as metal mesh with strip-patterned a-IGZO layer, mechanical stability of the TFT can be greatly improved and thus there is no crack generation even after 60 000 bending cycles with the radius of 0.32 mm.

  2. Deciphering the NH4PbI3 Intermediate Phase for Simultaneous Improvement on Nucleation and Crystal Growth of Perovskite

    Haonan Si, Qingliang Liao, Zhuo Kang, Yang Ou, JingJing Meng, Yichong Liu, Zheng Zhang and Yue Zhang

    Version of Record online: 22 JUN 2017 | DOI: 10.1002/adfm.201701804

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    An innovative NH4I-induced phase transformation is designed to optimize the perovskite crystallization from both nucleation and crystal growth aspects. The rational designed intermediate phase NH4PbI3 simultaneously contributes to the extra heterogeneous nucleation sites and slows down crystal growth rate, which finally leads to the optimized perovskite quality and advanced photovoltaic performance with extra 10% improvement.

  3. Solution Processed Boron Nitride Nanosheets: Synthesis, Assemblies and Emerging Applications

    Wei Luo, Yanbin Wang, Emily Hitz, Yi Lin, Bao Yang and Liangbing Hu

    Version of Record online: 19 JUN 2017 | DOI: 10.1002/adfm.201701450

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    Boron nitride (BN) is an important material in the family of two-dimensional (2D) materials. Advanced applications of few-layer or monolayer BN nanosheet prepared by solution processed methods, including one-step sonication, surface modification, and ball-mill-assisted are rapidly emerging as an exciting area of research that is attracting considerable attention from both industry and academia.

  4. Micrometer-Sized RuO2 Catalysts Contributing to Formation of Amorphous Na-Deficient Sodium Peroxide in Na–O2 Batteries

    Feng Wu, Yi Xing, Jingning Lai, Xiaoxiao Zhang, Yusheng Ye, Ji Qian, Li Li and Renjie Chen

    Version of Record online: 16 JUN 2017 | DOI: 10.1002/adfm.201700632

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    The oxygen electrode determines the morphology and composition of the discharge product in the Na–O2 battery, which simultaneously influences the cycling performance. Attributing to the effect of micrometer-sized RuO2 catalyst, the Na2-xO2 with amorphous phase is identified as discharge products, and the occurrence of the side reactions is effectively minimized. Notably, the Na–O2 battery with m-RuO2-B-rGO as cathode achieves a long cycle life.

  5. Chemically Functionalized Natural Cellulose Materials for Effective Triboelectric Nanogenerator Development

    Chunhua Yao, Xin Yin, Yanhao Yu, Zhiyong Cai and Xudong Wang

    Version of Record online: 16 JUN 2017 | DOI: 10.1002/adfm.201700794

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    Cellulose nanofibrils (CNFs) are chemically functionalized with nitro groups and methyl groups to engineer their tribopolarities, which in turn significantly enhances the electrical output of the triboelectric nanogenerator. The figures of merit of the nitro-CNF and methyl-CNF are quantified to be 0.51 and 0.28, respectively, comparable to or exceeding a number of common synthetic triboelectric polymer materials.

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