Dual plasmonic metallic nanostructures in organic solar cells are demonstrated by simultaneously incorporating gold nanoparticles (NPs) into the active layer and fabricating silver nanograting electrode means of a vacuum-assisted nanoimprinting method. Apart from waveguide modes diffraction, hybridized surface resonances (SPRs, Ag nanograting) localized (LPRs, Au NPs) introduced to successfully achieve high power conversion efficiency (PCE). Detailed facts importance specialist readers...

With the consideration of photon recycling effect, efficiency limit methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells is predicted by a detailed balance model. To obtain convincing predictions, both AM 1.5 spectrum Sun and experimentally measured complex refractive index material are employed in The roles light trapping angular restriction improving maximal output power thin-film also clarified. (without restriction) about 31%, which approaches to Shockley-Queisser (33%)...

Abstract It is been widely reported that plasmonic effects in metallic nanomaterials can enhance light trapping organix solar cells (OSCs). However, typical nanoparticles (NP) of high quality (i.e., mono‐dispersive) only possess a single resonant absorption peak, which inevitably limits the power conversion efficiency (PCE) enhancement to narrow spectral range. Broadband obviously highly desirable. In this paper, combination Ag different shapes, including and nanoprisms, proposed for...

We unveil new device physics and provide details of mechanisms by investigating polymer solar cells (PSCs) incorporating Au nanoparticles (NPs) into the hole collection poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) layer. Theoretical experimental results show that very strong near field around NPs due to Localized Surface Plasmonic Resonance (LSPR) mainly distributes laterally along PEDOT:PSS layer rather than vertically adjacent active layer, leading minimal...

A star-shaped polymer enables inverted perovskite solar cells with efficiency over 22% and a very high fill factor of 0.862.

The effects of Au nanoparticles (NPs) incorporated into the active layer polymer solar cells (PSCs) with a newly synthesized donor are investigated in detail. Our work shows that localized surface plasmon resonance (LSPR) introduced by metallic NPs can experimentally and theoretically enhance light absorption PSCs because strong LSPR near field mainly distributes laterally along layer. understanding be applied to other NP organic cells. Meanwhile, our results show electrical properties...

Although a relatively new area of nanoscience, nonlinear plasmonics has become fertile ground for the development and testing ideas pertaining to light–matter interaction under intense field conditions, that have found multitude applications in surface science, active photonic nanodevices, near-field optical microscopy, integrated photonics. In this review, we survey latest developments three-dimensional (metallic) two-dimensional (graphene) nanostructures offer an outlook on future...

Perovskite solar cells (PSCs) have attracted tremendous interest because of their rapid improvement in power conversion efficiency (PCE) from the initial PCE 3.8% for first prototype to certified 25.2% 2019.

Innovative multiplexing technologies based on nano-optics for anti-counterfeiting have been proposed as overt and covert to secure products make them difficult counterfeit. However, most of these nano-optical materials are metasurfaces metamaterials with complex expensive fabrication process, often resulting in that not damage tolerant. Highly efficient easy process targeted intuitive effective authentication banknotes, documents, goods packing. Here, a simple strategy exploiting...

The multi-user Holographic Multiple-Input and Multiple-Output Surface (MU-HMIMOS) paradigm, which is capable of realizing large continuous apertures with minimal power consumption, has been recently considered as an energyefficient solution for future wireless networks, offering increased flexibility in impacting electromagnetic (EM) wave propagation according to the desired communication, localization, sensing objectives. tractable channel modeling MU-HMIMOS systems one most critical...

Extremely large-scale multiple-input-multipleoutput (XL-MIMO) is a promising technology to empower the next-generation communications.However, XL-MIMO, which still in its early stage of research, has been designed with variety hardware and performance analysis schemes.To illustrate differences similarities among these schemes, we comprehensively review existing XL-MIMO designs characteristics this article.Then, thoroughly discuss research status from "channel modeling", "performance...

The active layer of a low bandgap polymer solar cell has been patterned by simple imprinting technique, and thin metal oxide/metal layers have coated on the to form grating back electrode. By finely controlling distance between layer, about 10% short current enhancement (Jsc) is seen, without any obvious degradation open circuit voltage or fill factor. power conversion efficiency increases from 7.20 7.73%, which due absorption waveguide modes, Wood's anomaly, plasmonic effects. Detailed...

We demonstrate efficiency improvement in polymer solar cells (PSCs) by ∼22% through incorporating Au nanoparticles (NPs) into all layers. NPs are found to have distinct mechanisms improving device performance when incorporated different poly-(3,4-ethylenedioxythiophene):poly(styrenesulfonate) mainly contribute better hole collection while active layer contributes the enhanced optical absorption and more balanced charge-transport. Our theoretical result shows that enhancement at is attributed...

Abstract Optical effects of the plasmonic structures and materials metal nanomaterials have recently been individually studied for enhancing performance organic solar cells (OSCs). Here, plasmonically induced carrier generation enhanced extraction transport layer (i.e., plasmonic‐electrical effects) in OSCs are investigated. Enhanced charge TiO 2 as a highly efficient electron by incorporation nanoparticles (NPs) is proposed demonstrated. Efficient device demonstrated using Au NPs...

Vortex beams carrying orbital angular momentum (OAM) are extensively studied owing to its potential expand channel capacity of microwave and optical communication. By utilizing the Pancharatnam-Berry phase concept, an ultrawideband single-layer metasurface is proposed realize conversion from incident plane waves reflected vortex covering a considerable bandwidth 6.75 21.85 GHz (>105%). An equivalent circuit model combined with broadband shift network developed effectively design metaatoms in...

In this letter, a new deep learning (DL) approach is proposed to solve the electromagnetic inverse scattering (EMIS) problems. The conventional methods for solving problems face various challenges including strong ill-conditions, high contrast, expensive computation cost, and unavoidable intrinsic nonlinearity. To overcome these issues, we propose two-step machine based approach. first step, complex-valued convolutional neural network employed retrieve initial contrasts (permittivities) of...

While indirectly patterned organic–inorganic hybrid perovskite nanostructures have been extensively studied for use in optoelectronic devices, it is still challenging to directly pattern thin films because very sensitive polar solvents and high‐temperature environments. Here, a simple low‐cost approach proposed solid‐state into periodic nanostructures. The basically recrystallization through phase transformation with the presence of mold on an as‐prepared film. Interestingly, this study...

Electromagnetic (EM) waves with helical wave front carry orbital angular momentum (OAM), which is associated the azimuthal phase of complex electric field. OAM a new degree freedom in EM and promising for channel multiplexing communication system. Although OAM-carrying attracts more attention, method generation at microwave frequencies still faces challenges, such as efficiency simulation time. In this communication, by using circuit theory equivalence principle, we build two simplified...

We present a comprehensive review on the geometric-phase based metasurfaces for orbital angular momentum(OAM) generation and detection. These manipulate electromagnetic (EM) wave by introducing abrupt phase change, which is strongly dependent polarization state of incident EM can be interpreted geometric phase. Hence, conventional bulk devices that accumulated change along optical path avoided.

Orbital angular momentum (OAM) is a promising degree of freedom for fundamental studies in electromagnetics and quantum mechanics. The unlimited state space OAM shows great potential to enhance channel capacities classical communications. By exploring the Pancharatnam-Berry phase concept engineering anisotropic scatterers metasurface with spatially varying orientations, plane wave zero can be converted vortex beam carrying nonzero OAM. In this paper, we proposed two types novel PEC (perfect...

The power conversion efficiency (PCE) of low-bandgap mixed Pb–Sn perovskite solar cells (PSCs) has been significantly hindered by large open-circuit voltage (Voc) loss and poor fill factor (FF). Herein, films with a composition (FASnI3)0.6(MAPbI3)0.4 were processed simple delayed annealing (DA) treatment that enables reduced surface roughness. reduces nonradiative recombination interfacial contacts when the are interfaced poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS)...

Although the theoretical power conversion efficiency (PCE) of low‐bandgap Pb–Sn‐alloyed perovskite solar cells (PSCs) is higher than that its conventional pure Pb counterpart, device performance currently has been severely restricted by large open‐circuit voltage ( V oc ) loss. Herein, it discovered Sn 4+ ‐induced trap states film can be effectively suppressed introducing excess powder into precursor solution (FASnI 3 to reduce content. As a result, average charge carrier lifetime increases...