Heavy-atom integration into thermally activated delayed fluorescence (TADF) molecule could significantly promote the reverse intersystem crossing (RISC) process. However, simultaneously achieving high efficiency, small roll-off, narrowband emission and good operational lifetime remains a big challenge for corresponding organic light-emitting diodes (OLEDs). Herein, we report pure green multi-resonance TADF BN-STO by introducing peripheral heavy atom selenium onto parent BN-Cz molecule. The...

Abstract Perovskite/c-Si tandem solar cells (TSCs) have become a promising candidate in recent years for achieving efficiency over 30%. Although general analysis has shown very high upper limits such TSCs, it remains largely unclear what specific optical structures could best approach these limits. Here we propose the combination of perovskite/c-Si structure with inverted nanopyramid morphology as practical way above 31% based on realistic cell parameters. By full-field simulation, that an...

Nanostructured silicon solar cells show great potential for new‐generation photovoltaics due to their ability approach ideal light‐trapping. However, the nanofeatured morphology that brings about optical benefits also introduces new recombination channels, and severe deterioration in electrical performance even outweighs gain optics most attempts. This Research News article aims review recent progress suppression of carrier nanostructures, with emphasis on optimization surface controllable...

Metal-organic frameworks are versatile platforms for photocatalysis owing to their facile capacity incorporate active sites within organic linkers, nodes and open channels. However, the dual tuning of both functional guests enhanced photocatalytic performance remains largely unexplored. Herein, we report incorporation polyoxometalate guests, {PM10V2} (M = Mo or W), into isoreticular 2D MOFs that constructed from an anthraquinone-derived ligand dinuclear {Cd2X(H2O)4} (X Br I), yielding...

We report the realization of both excellent optical and electrical properties nanostructured multicrystalline silicon solar cells by a simple industrially compatible technique surface morphology modification. The nanostructures are prepared Ag-catalyzed chemical etching subsequent NaOH treatment with controllable geometrical parameters area enhancement ratio. have examined in detail influence different ratios on reflectance, carrier recombination characteristics cell performance. By...

Semiconductor nanowires (NWs) have long been used in photovoltaic applications but restricted to approaching the fundamental efficiency limits of planar devices with less material. However, recent researches on standing NWs started reveal their potential surpassing these when unique optical property is utilized novel manners. Here, we present a theoretical guideline for maximizing conversion single NW cell based detailed study its absorption mechanism. Under normal incidence, behaves as...

Abstract Heavy‐atom integration into thermally activated delayed fluorescence (TADF) molecule could significantly promote the reverse intersystem crossing (RISC) process. However, simultaneously achieving high efficiency, small roll‐off, narrowband emission and good operational lifetime remains a big challenge for corresponding organic light‐emitting diodes (OLEDs). Herein, we report pure green multi‐resonance TADF BN‐STO by introducing peripheral heavy atom selenium onto parent BN‐Cz...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of Rigid and Semirigid Molecules for Investigations Photoinduced Electron Transfer ReactionsKrishna Kumar, Ronald J. Tepper, Yang Zeng, Matthew B. ZimmtCite this: Org. Chem. 1995, 60, 13, 4051–4066Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995https://pubs.acs.org/doi/10.1021/jo00118a023https://doi.org/10.1021/jo00118a023research-articleACS PublicationsRequest reuse...

It has been widely recognized that nanostructures in natural biological materials play important roles regulating life machinery. Even though nanofabrication techniques such as two-photon polymerization (TPP) provide sub-100 nm fabrication resolution, it remains technologically challenging to produce 3D nanoscale features modeling the complexity vivo. We herein demonstrate a nanochannel array carrying different sizes and with gradually transitioning dimensions can be easily produced on...

The physical and chemical interactions with vancomycin (VAN) were accessed between graphene oxide (GO) crumpled (CGO) to present the possible loading release mechanisms. improved hydrophilicity surface charge found on CGO through water contact angle ζ-potential measurements. Fourier transform infrared X-ray photoelectron spectroscopies confirmed attachment of VAN onto or GO π-π stacking hydrogen bonding. Both CGO-VAN GO-VAN drug complexes showed pH-controlled property. high delayed in system...

We theoretically studied the assembly of horizontal single crystalline-silicon (c-Si)/amorphous-silicon (a-Si) core/shell nanowires (NWs) into c-Si/a-Si half-coaxial NW arrays (NWAs), which can be realized in large size for heterojunction solar cells. Through finite-difference time-domain simulations, we investigated absorption mechanism scheme. The building block NWAs owns strong leaky mode resonances, are key NWs to exceed planar limit. These resonances well preserved NWAs, leading an...

We present a simple assembly strategy of single nanowires (NWs) to form half-coaxial nanowire arrays (NWAs) which can be easily realized in large size by standard pattering and deposition techniques. Through the finite-difference time-domain simulation, we show that proposed NWAs effectively preserve leaky modes resonances within NWs consequently achieve strong absorption enhancement under optimization various structural factors. The best with 100 nm thick absorbing shell offer equivalent...

The CuZnSn (CZT) precursor thin films are grown by ion-beam sputtering Cu, Zn, Sn targets with different orders and then Se target to fabricate Cu2ZnSnSe4 (CZTSe) absorber on molybdenum substrates. They annealed in the same vacuum chamber at 400 °C. characterization methods of CZTSe include X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), photoelectron spectra (XPS) order study crystallographic properties, composition, surface morphology,...

We propose a Mobius-strip-type plasmonic cavity with silver Mobius strip sandwiched between dielectric layers. By brief theoretical and simulation analyses, we obtain that the factor of remains about 40 mode volume is ultrasmall (less than 1 ) which more compact cylindric cavity. This supporting propagation surface plasmon polaritons owns some unusual properties such as effective spatial separation. More potential applications based on this remain to be explored in future nanophotonics.

The single standing nanowire (SNW) solar cells have been proven to perform beyond the planar efficiency limits in both open-circuit voltage and internal quantum due built-in concentration shifting of absorption front. However, expandability these nano-scale units a macro-scale photovoltaic device remains unsolved. main difficulty lies simultaneous preservation an effective each unit cell broadband high capability their array. Here, we provided detailed theoretical guideline for realizing...

Some microorganisms produce biopolymers with adhesive, film-forming, and plant-promoting properties in their fermentation broths. These hold significant potential as substitutes for chemical film-forming helpers liquid mulch. The present study involved the preparation of a novel bio-based helper (BFH-L) through process bio-fermentation utilizing L. mesenteroides. successful BFH-L was confirmed assessment adhesive plant growth-promoting efficacy exhibited by mesenteroides BFH-L. comprehensive...

The live cell imaging platform based on bright-field microscopy imaging.

We demonstrate improved short-wavelength internal quantum efficiency (IQE) of a-Si/c-Si heterojunction (HJ) solar cells with a surface nanopillar (NP) array via simulation. The gain in IQE is attributed to the light-field modulation caused by cavity resonance inside NPs, which light energy effectively localized within c-Si bulk rather than a-Si layer. average range (330-450 nm) enhanced from 43.94% 62.88% optimal NP array, maximum 80.98% at λ = 400 nm. resulting current over 38.25% compared...