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  1. Emerging Low-Dimensional Materials for Nonlinear Optics and Ultrafast Photonics

    Xiaofeng Liu, Qiangbing Guo and Jianrong Qiu

    Version of Record online: 22 FEB 2017 | DOI: 10.1002/adma.201605886

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    Two-dimensional materials, topological insulators and plasmonic nanomaterials exhibit distinct and intriguing electrical and optical properties, making them the focus of intensive research in the past decade. Their interactions with intense pulse lasers are strongly nonlinear, and surprisingly all of them can serve as efficient saturable absorbers to enable ultrafast pulse generation in a wide spectral range.

  2. Effect of the Microstructure of the Functional Layers on the Efficiency of Perovskite Solar Cells

    Fuzhi Huang, Alexander R. Pascoe, Wu-Qiang Wu, Zhiliang Ku, Yong Peng, Jie Zhong, Rachel A. Caruso and Yi-Bing Cheng

    Version of Record online: 22 FEB 2017 | DOI: 10.1002/adma.201601715

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    The performance of perovskite solar cells is greatly affected by the microstructure of the functional layers, especially that of the perovskite film. By controlling the nucleation and crystal growth process, desirable microstructures (grains and voids size) of the perovskite films, such as dense films with large grains, can be achieved for high-efficiency solar cells.

  3. Ultrahigh Carrier Mobility Achieved in Photoresponsive Hybrid Perovskite Films via Coupling with Single-Walled Carbon Nanotubes

    Feng Li, Hong Wang, Dominik Kufer, Liangliang Liang, Weili Yu, Erkki Alarousu, Chun Ma, Yangyang Li, Zhixiong Liu, Changxu Liu, Nini Wei, Fei Wang, Lang Chen, Omar F. Mohammed, Andrea Fratalocchi, Xiaogang Liu, Gerasimos Konstantatos and Tom Wu

    Version of Record online: 22 FEB 2017 | DOI: 10.1002/adma.201602432

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    A strategy to enhance the carrier mobility of photoresponsive hybrid perovskite films is realized via coupling with single-walled carbon nanotubes. Hole and electron mobilities of the devices reach ultrahigh values of 595.1 and 108.7 cm2 V-1 s-1, and such ambipolar phototransistors with composite channels provide a versatile platform for diverse fields of optoelectronics, solar energy conversion, and molecular sensing.

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    Mastering the Photothermal Effect in Liquid Crystal Networks: A General Approach for Self-Sustained Mechanical Oscillators

    Anne Helene Gelebart, Ghislaine Vantomme, Bert E. W. Meijer and Dirk J. Broer

    Version of Record online: 22 FEB 2017 | DOI: 10.1002/adma.201606712

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    Commonly used photostabilizers and dyes are added to liquid-crystalline polymeric materials to bring out-of-equilibrium deformation under continuous input of energy. Molecules able to quickly dissipate the absorbed light through heat, by vibrational and/or rotational modes, can reach self-oscillating macroscopic motion where self-shadowing plays a critical role. The mechanical self-oscillation is linked to thermal oscillation, demonstrating the key function of the photothermal effect.

  5. A Dual-Organic-Transistor-Based Tactile-Perception System with Signal-Processing Functionality

    Yaping Zang, Hongguang Shen, Dazhen Huang, Chong-An Di and Daoben Zhu

    Version of Record online: 22 FEB 2017 | DOI: 10.1002/adma.201606088

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    By the construction of organic synaptic transistors with integrated sensing transistors, a dual-organic-transistor-based tactile-perception element with pressure sensing and synapse-like signal-processing functions in a single element is demonstrated. This biomimetic functionality makes this work represent a step forward toward novel e-skin devices for artificial intelligence.