Electronic skin sensing devices are an emerging technology and have substantial demand in vast practical fields including wearable sensing, robotics, user‐interactive interfaces. In order to imitate or even outperform the capabilities of natural skin, keen exploration materials, device structures, new functions is desired. However, very high resistance inadequate current switching sensitivity reported electronic skins hinder further develop explore promising uses devices. Here, a novel...

Random laser with intrinsically uncomplicated fabrication processes, high spectral radiance, angle-free emission, and conformal onto freeform surfaces is in principle ideal for a variety of applications, ranging from lighting to identification systems. In this work, white random (White-RL) high-purity high-stability designed, fabricated, demonstrated via the cost-effective materials (e.g., organic dyes) simple methods all-solution process self-assembled structures). Notably, wavelength,...

A facile and one-pot approach to the preparation of gold (Au) copper (Cu) bimetallic nanoclusters (NCs) is unveiled. AuCu NCs reveal features orange photoluminescence (PL), reversible pH-dependent PL properties, efficient catalytic activity for degradation methylene blue (MB).

Fabrication of functional devices on arbitrary non‐conventional substrates has significant advantages for broadening applications and the development soft electronic systems such as flexible, stretchable, wearable, epidermal modules. Information storage device is one crucial elements in modern digital circuitries. Herein, a re‐writable, transferable, flexible sticker‐type organic memory universal demonstrated through facile cost‐effective one‐step strategy. The sticker based graphene...

Quasi-periodic structures of natural biomaterial membranes have great potentials to serve as resonance cavities generate ecological friendly optoelectronic devices with low cost. To achieve the first attempt for illustration underlying principle, Pieris canidia butterfly wing was embedded ZnO nanoparticles. Quite interestingly, it is found that bio-inspired quasi-single-mode random laser can be achieved by assistance skeleton membrane, in which nanoparticles act emitting gain media. Such...

A newly designed transferable and flexible label-like organic memory based on a graphene electrode behaves like sticker, can be readily placed desired substrates or devices for diversified purposes. The label reveals excellent performance despite its physical presentation. This may greatly extend the applications in various advanced electronics provide simple scheme to integrate with other electronics. As service our authors readers, this journal provides supporting information supplied by...

A self-powered photodetector with ultrahigh sensitivity, fast photoresponse, and wide spectral detectivity covering from 1000 nm to 400 based on graphene/ZnO/Si triple junctions has been designed, fabricated, demonstrated. In this device, graphene serves as a transparent electrode well an efficient collection layer for photogenerated carriers due its excellent tunability of Fermi energy. The ZnO acts antireflection trap the incident light enhance absorption. Furthermore, insertion in between...

Composite materials can play a decisive role to reveal novel physical properties and enable advance new generation technologies. Here, we discover that phototransistors based on the integration of two-dimensional graphene nanosheets (GNSs) amorphous indium–gallium–zinc–oxide (a-IGZO) semiconductors exhibit giant photo-to-dark current ratio long-lasting persistent photoconductivity (PPC). Under illumination UV light (350 nm) at 50 mW/cm2, up 2.0 × 107 was obtained, which is about 3 orders...

An integrated random laser based on green materials with dissolubility and recyclability is created demonstrated. The dissolvable recyclable (DRRL) can be dissolved in water, accompanying the decay of emission intensity increment lasing threshold. Furthermore, DRRL reused after process deionized treatment, exhibiting excellent reproducibility several recycling processes.

Recently, mixed-dimensional p-n heterojunctions have shown desirable optoelectronic functionalities. However, relatively little is known about the influence of interfacial traps on electron transport under external bias. Here, we explore prominent dual characteristics n-MoS2/p-GaN heterostructures, including photodetection and persistent photocurrent (PPC). The photoresponsivity was found to achieve as high ∼105 A W−1 for 532 nm laser illumination reverse Additionally, device exhibits...

The freedom from efficiency droop motivates monochromatic lasers to progress in general lighting applications due the demand for more efficient and sustainable light sources. Still, a white based on with high quality, such as color rendering ability, an angle-independent output, speckle-free illumination, has not yet been fabricated nor demonstrated. Random lasers, special mechanism caused by multiple scattering, angle-free emission, uncomplicated fabrication processes, inspire us...

Investigation on the defect-related luminescence centered around 2.8 eV in Si-doped GaN epifilms is presented. It found that mechanism of this blue emission (BL) quite different from yellow (YL). By comparing photoluminescence (PL) spectra obtained either front-side or backside excitation and combining with results BL YL-related PL secondary-ion-mass spectroscopy measurements, we propose 2.8-eV transition substitutional oxygen donor $({\mathrm{O}}_{\mathrm{N}})$ level at 0.25 above...

The trend towards simple and low-cost processing is one of the most important for macromolecular memory development. Here, bistable devices using a solution-processable active material, mixture graphene nanoflakes (GNFs) insulating poly(vinyl alcohol) (PVA), are investigated, which serve as first example direct integration as-prepared nanoscale into through one-step low-temperature method. Bistable electrical switching behavior nonvolatile rewritable effects realized by an...

Abstract We have employed mannose‐modified gold nanodots (Man–Au NDs) as a luminescence sensor for the detection of thyroid‐cancer marker thyroglobulin (Tg) in homogeneous solutions. The luminescent Man–Au NDs are prepared through reaction 2.9 nm‐diameter nanoparticles (Au NPs) with 11‐mercapto‐3,6,9‐trioxaundecyl‐α‐ D ‐mannopyranoside (Man‐RSH) under irradiation light‐emitting diode (LED). found that enhances quantum yield (∼11 %), alters emission wavelength and lifetimes, shortens...

Transparent and flexible thin film transistors (TFTs) with high performance based on solution processed graphene nanosheets (GNSs)–amorphous indium–gallium–zinc-oxide (a-IGZO) composites have been developed. A electron mobility of 23.8 cm2 V−1 s−1 has achieved, which is about thirty times higher than those the pristine a-IGZO TFTs (0.82 s−1) hydrogenated amorphous silicon (<1 s−1). The on/off current ratio remains in a order 106 demonstrating sustainability TFT devices. In addition,...

Hyperbolic metamaterials have emerged as novel materials with exciting functionalities, especially for optoelectronic devices. Here, we provide the first attempt to integrate hyperbolic light emitting nanostructures, which enables strongly enhance random laser action reduced lasing threshold. Interestingly, differential quantum efficiency can be enhanced by more than four times. The underlying mechanism interpreted well based on fact that high-k modes excited greatly increase possibility of...

We report the photoluminescence studies of pristine and diethylenetriamine-doped (DETA-doped) WS2 quantum dots (QDs) synthesized by pulsed laser ablation. The DETA-doped QDs revealed a notable improvement luminescence yield from 0.1% to 15.2% in comparison QDs. On basis (PL) under different excitation wavelengths emission-energy dependence PL dynamics, we suggest that excitation-wavelength-dependent (excitation-wavelength-independent) for is attributed recombination carriers localized...

ZnO-based heterojunctions have found applications as self-powered ultraviolet photodetectors (PDs). However, high doping levels are not compatible with mobility for metallic doped PDs so further development has been inhibited. This study demonstrates a method to increase the open-circuit voltage (V oc) that allows keeping sufficiently level of ZnO, using ZnO nanorod/GaN heterojunction incorporates graphene nanosheets active layer. These hybrid triple value V oc only pure and better exhibit...

Abstract Due to strong Coulomb interactions, reduced screening effects, and quantum confinement, transition-metal dichalcogenide (TMD) monolayer disks (MQDs) are expected exhibit large exciton binding energy, which is beneficial for the investigation of many-body physics at room temperature. Here, we report first observations room-temperature effects in tungsten disulfide (WS 2 ) MQDs by both optical measurements theoretical studies. The band-gap renormalization WS was about 250 ± 15 meV as...

The many distinct advantages of random lasers focused efforts on developing a breakthrough from optical pumping to electrical pumping. However, progress in these is limited due high loss and low gain. In this work, we demonstrate an electrically pumped quantum dot (QD) laser with visible emission based previously unexplored paradigm named coherent Förster resonance energy transfer (CFRET). the CFRET process, when photonic mode formed because multiple scattering emitted light traveling mixed...

With the superiority of laser-level intensity, narrow spectral line width, and broad-angular emission, random lasers (RLs) have drawn considerable research interests for their potential to carry out a variety applications. In this work, applications associated with optical-encoded technologies, including security printing, military friend or foe identification (FFI), anticounterfeiting documents are highlighted, concept transient RL "smart ink" has been proposed. The proof-of-concept was...

Green-light-emitting InGaN/GaN multiple quantum wells (MQWs) with high luminescent efficiency were grown by metalorganic chemical vapour deposition (MOCVD). The microstructure of the sample was studied high-resolution transmission electron microscopy (HRTEM) and x-ray diffraction, while its optical behaviour analysed in great detail a variety photoluminescence methods. Two InGaN-related peaks that clearly found (PL) spectrum are assigned to quasi-quantum dots (516 nm) InGaN matrix (450 nm),...

Semiconductor heterostructures represent the most important building block for current optoelectronic devices.One of common features semiconductor is existence internal strain due to lattice mismatch.The can tilt band alignment and significantly alter physical properties heterostructures, such as reducing quantum efficiency a light emitter.Here, we provide convenient route release by patterning into nanotip arrays.The fabrication arrays was achieved self-masked dry etching technique, which...

Abstract MoS 2 quantum dots (QDs)‐based white‐light‐emitting diodes (QD‐WLEDs) are designed, fabricated, and demonstrated. The highly luminescent, histidine‐doped QDs synthesized by microwave induced fragmentation of 2D nanoflakes possess a wide distribution available electronic states as inferred from the pronounced excitation‐wavelength‐dependent emission properties. Notably, show very strong intensity, which exceeds seven times magnitude larger than that pristine QDs. strongly enhanced is...