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Editor-in-Chief: Peter Gregory, Deputy Editor: Jos Lenders
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
On the Cover
In article number 1800376, Hisahiro Sasabe, Hironori Kaji, Junji Kido and co-workers demonstrate thermally activated delayed fluorescent (TADF) organic light-emitting diodes exhibiting ultra-high power efficiency. The cover picture represents that pyrimidine-based electron-transporting materials maximize the potential of green TADF emitters. Small structural differences in electron-transporters make significant differences in the device performances.
Marina S. Leite and co-workers (article number 1800218) demonstrate the alloying of Ag and Au for band structure engineering. The tunability of the optical dispersion relation is measured by reflectivity and valence band spectra. The band structure calculations corroborate the experiments, while elucidating the energy shift of interband transitions. The image represents the optical measurements in the Ag-Au system.
Recent advances in nanofabrication enable the realization of various extremely deep-sub-wavelength structures. Building upon the fundamental progress of light trapping and confinement strategies, new applications of boosted light-matter interaction within extremely small dimensions received extensive research efforts, as reviewed by Yun Xu, Dengxin Ji, Qiaoqiang Gan and co-workers in article number 1800444. The cover image conceptually highlights representative designs of plasmonic metamaterial structures with extremely small features that are used to boost the light-matter interaction.
The development and organic light-emitting diode (OLED) applications of near-infrared emitting materials based on phosphorescent metal complexes and thermally activated delayed fluorescence (TADF) materials are summarized by Wai-Yeung Wong, Weiguo Zhu and co-workers in their Hall of Fame review (article number 1800466). These materials can make use of the triplet excitons. The cover image shows the near-infrared emitted light from a device which exploits both singlet and triplet excitons.
Articles
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Highly Sensitive Broadband Single‐Walled Carbon Nanotube Photodetectors Enhanced by Separated Graphene Nanosheets
- Advanced Optical Materials
- 21 September 2018
Abstract
A proof‐of‐concept all‐carbon hybrid photodetector is demonstrated using single‐walled carbon nanotube (SWCNT)/separated graphene Schottky junctions, exhibiting ultrahigh responsivity, microsecond and broadband photoresponse. To understand the mechanism of such greatly enhanced performance, the charge transfer dynamics at the planar SWCNT/separated graphene Schottky junctions are first investigated by combining Raman spectra under different bias voltage with current–voltage curves.
Bioinspired Design of Vascular Artificial Muscle
- Advanced Optical Materials
- 20 September 2018
Abstract
Vascular artificial muscle can be actively and internally heated up or cooled down by injecting hot or cold fluid into its internal fluidic channel to induce fast actuation and recovery. The actuation stress, strain, cyclic response rate, and working density of the vascular artificial muscle are all comparable to mammalian skeletal muscle.
Stretchable Structural Color Filters Based on a Metal–Insulator–Metal Structure
- Advanced Optical Materials
- 20 September 2018
Abstract
Color filters are a highly relevant component for modern technologies. Herein, ultrathin, stretchable, and flexible structural color filters are demonstrated. Remarkably, the performance of the filters is not greatly impacted by repeated mechanical deformation. Overall, these findings represent a strategy for making conformal color filters with compatible mechanical properties to current flexible and/or wearable technologies without sacrificing functionality.
Recent Advances in Flexible Inorganic Light Emitting Diodes: From Materials Design to Integrated Optoelectronic Platforms
- Advanced Optical Materials
- 20 September 2018
Abstract
Flexible inorganic light emitting diodes (ILEDs) create new possibilities in many existing and emerging applications. This review summarizes recent progress in the field of flexible ILEDs, from material designs, to state‐of‐the‐art devices, to their integration in advanced platforms such as wearable and implantable bioelectronics.
Reliable Information Encryption and Digital Display Applications Based on Multistate Smart Windows
- Advanced Optical Materials
- 19 September 2018
Abstract
A multistate smart window based on the reversible electrodepositing metal device (REMD) with excellent electrochromic performance is reported. Notably, a reliable information encryption device and a novel digital display are proposed and designed. This REMD will broaden the potential applications in electrochromic smart windows.
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The following is a list of the most cited articles based on citations published in the last three years, according to CrossRef.
High‐Efficiency Dielectric Huygens’ Surfaces
- Manuel Decker
- Isabelle Staude
- Matthias Falkner
- Jason Dominguez
- Dragomir N. Neshev
- Igal Brener
- Thomas Pertsch
- Yuri S. Kivshar
- Advanced Optical Materials
- 813-820
- 1 February 2015
Abstract
All‐dielectric Huygens' metasurfaces are experimentally demonstrated providing transmission‐phase coverage from 0 to 2π with record resonant transmission efficiencies of more than 55% at NIR wavelengths. Transmission efficiencies very close to 100% can be achieved for an appropriate choice of the embedding medium, and possible applications of this new concept are explored.
Magnetoplasmonics: Combining Magnetic and Plasmonic Functionalities
- Advanced Optical Materials
- 10-35
- 31 January 2013
Abstract
Magnetoplasmonic systems possess both plasmonic and magnetic functionalities. By a smart combination of plasmonic and ferromagnetic materials with magnetooptical activity it is possible to design nanostructures whose magneto‐optical properties are enhanced by plasmon resonance excitation, and whose plasmonic properties are modulated by an external magnetic fi eld. These structures fi nd applications in sensing devices as well as in optical communications.
Synthesis of Organic–Inorganic Lead Halide Perovskite Nanoplatelets: Towards High‐Performance Perovskite Solar Cells and Optoelectronic Devices
- Advanced Optical Materials
- 838-844
- 23 May 2014
Abstract
Highly crystalline organic–inorganic lead halide perovskite nanoplatelets are grown on muscovite mica utilizing van der Waals epitaxial growth followed by thermally intercalating methyl ammonium halides. The resulting CH3NH3PbI3 platelets show excellent optical properties with an electron diffusion length of more than 200 nm, which is approximately two times higher than that of the solution‐processed film, suggesting considerable promise in photovoltaics and optoelectronics.
