Advanced Materials

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Recently Published Articles

  1. Temporospatial Control of Graphene Wettability

    Kalimuthu Vijayarangamuthu, Seungbae Ahn, Hyungtak Seo, Sang-Hee Yoon, Cheol-Min Park and Ki-Joon Jeon

    Article first published online: 30 NOV 2015 | DOI: 10.1002/adma.201503444

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    The reversible migration of adatoms along a basal plane of graphene under electrical bias is experimentally demonstrated. Single-layer graphene oxide with partial oxygen adatom coverage is utilized for this demonstration. The intensity ratio of G and G′ Raman modes is used to determine the oxygen adatoms migration. Finally, reversible wettability property of graphene due to oxygen adatom migration is demonstrated.

  2. Extremely Low Contact Resistance on Graphene through n-Type Doping and Edge Contact Design

    Hyung-Youl Park, Woo-Shik Jung, Dong-Ho Kang, Jaeho Jeon, Gwangwe Yoo, Yongkook Park, Jinhee Lee, Yun Hee Jang, Jaeho Lee, Seongjun Park, Hyun-Yong Yu, Byungha Shin, Sungjoo Lee and Jin-Hong Park

    Article first published online: 30 NOV 2015 | DOI: 10.1002/adma.201503715

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    The effects of graphene n-doping on a metal–graphene contact are studied in combination with 1D edge contacts, presenting a record contact resistance of 23 Ω μm at room temperature (19 Ω μm at 100 K). This contact scheme is applied to a graphene–perovskite hybrid photodetector, significantly improving its performance (0.6 [RIGHTWARDS ARROW] 1.8 A W−1 in photoresponsivity and 3.3 × 104 [RIGHTWARDS ARROW] 5.4 × 104 Jones in detectivity).

  3. Highly Efficient Organic Hole Transporting Materials for Perovskite and Organic Solar Cells with Long-Term Stability

    Saripally Sudhaker Reddy, Kumarasamy Gunasekar, Jin Hyuck Heo, Sang Hyuk Im, Chang Su Kim, Dong-Ho Kim, Jong Hun Moon, Jin Yong Lee, Myungkwan Song and Sung-Ho Jin

    Article first published online: 30 NOV 2015 | DOI: 10.1002/adma.201503729

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    Small molecules based on N-atom linked phenylcarbazole-fluorene as the main scaffold, end capped with spirobifluorene derivatives, are developed as organic hole transporting materials for highly efficient perovskite solar cells (PSCs) and bulk heterojunction (BHJ) inverted organic solar cells (IOSCs). The CzPAF-SBF-based devices show remarkable device performance with excellent long-term stability in PSCs and BHJ IOSCs with a maximum PCE of 17.21% and 7.93%, respectively.

  4. Three-Component Integrated Ultrathin Organic Photosensors for Plastic Optoelectronics

    Hanlin Wang, Hongtao Liu, Qiang Zhao, Cheng Cheng, Wenping Hu and Yunqi Liu

    Article first published online: 30 NOV 2015 | DOI: 10.1002/adma.201503953

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    By three-component integration, an integrated organic photosensor is presented using common organic dyes as building blocks. Gray scale photosensing and signal amplification are achieved in the device within a wide range of light intensities. Moreover, with ultrathin film techniques, 470 nm thick devices are realized and continue to work when harshly bent.

  5. NIR-Remote Selected Activation Gene Expression in Living Cells by Upconverting Microrods

    Bin Zheng, Lin Su, Huizhuo Pan, Beibei Hou, Ying Zhang, Fang Zhou, Xiaoli Wu, Xiaoqun Gong, Hanjie Wang and Jin Chang

    Article first published online: 30 NOV 2015 | DOI: 10.1002/adma.201503961

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    A NIR-controlled gene expression system based on upconverting rods (UCRs) is demonstrated. The UCRs can harvest the “biocompatible” NIR light and convert it into local UV light, resulting in cleavage of the photosensitive molecule (4-(hydroxymethyl)-3-nitrobenzoic acid, ONA) and on-demand release of gene carriers, thus realizing target gene expression at high spatial and temporal resolutions.