An asymmetric squaraine sensitizer comprising an anchoring group was engineered at the molecular level and synthesized. The functionalized novel sensitizers upon onto a TiO2 film exhibit unprecedented incident photon to current conversion efficiency of 85%. photovoltaic data this using electrolyte having composition 0.6 M M-methyl-N-butyl imidazolium iodide, 0.05 iodine, 0.1 LiI, tert-butylpyridine in 15/85 (v/v) mixture valeronitrile acetonitrile revealed short circuit photocurrent density...

Abstract Lead sulfide (PbS) and cadmium (CdS) quantum dots (QDs) are prepared over mesoporous TiO 2 films by a successive ionic layer adsorption reaction (SILAR) process. These QDs exploited as sensitizer in solid‐state solar cells with 2,2′,7,7′‐tetrakis( N , ‐di‐ p ‐methoxyphenylamine)‐9,9′‐spirobifluorene (spiro‐OMeTAD) hole conductor. High‐resolution transmission electron microscopy (TEM) images reveal that PbS of around 3 nm size distributed homogeneously the surface well separated from...

A family of 2D transition metal carbides and nitrides known as MXenes has received increasing attention since the discovery Ti 3 C 2 in 2011. To date, about 30 different with well‐defined structures properties have been synthesized, many more are theoretically predicted to exist. Due numerous assets including excellent mechanical properties, metallic conductivity, unique in‐plane anisotropic structure, tunable band gap, so on, rapidly positioned themselves at forefront materials world found...

Abstract Designing lightweight nanostructured aerogels for high‐performance electromagnetic interference (EMI) shielding is crucial yet challenging. Ultrathin cellulose nanofibrils (CNFs) are employed assisting in building ultralow‐density, robust, and highly flexible transition metal carbides nitrides (MXenes) with oriented biomimetic cell walls. A significant influence of the angles between walls incident EM wave electric field direction on EMI performance revealed, providing an intriguing...

Abstract Printed functional conductive inks have triggered scalable production of smart electronics such as energy‐storage devices, antennas, wearable electronics, etc. Of particular interest are highly conductive‐additive‐free devoid costly postdeposition treatments to eliminate sacrificial components. Due the high filler concentration required, formulation waste‐free has proven quite challenging. Here, additive‐free, 2D titanium carbide MXene aqueous with appropriate rheological properties...

Abstract A novel method allowing rapid production of reliable composites with increased dielectric constant and high strength for elastomer actuators (DEA) is reported. The promising approach using conductive particles insulating polymers generally suffers from low breakdown fields when applied to DEA devices. present publication shows how overcome this deficiency by polyaniline (PANI) encapsulated into an polymer shell prior dispersion. PANI are miniemulsion polymerization (MP)...

Abstract The color changes in chemo- and photochromic MoO 3 used sensors organic photovoltaic (OPV) cells can be traced back to intercalated hydrogen atoms stemming either from gaseous dissociated at catalytic surfaces or photocatalytically split water. In applications, the reversibility of process is utmost importance, deterioration layer functionality due side reactions a critical challenge. Using membrane approach for high-pressure XPS, we are able follow reduction thin films using atomic...

The degradation of organic light emitting diodes (OLEDs) due to the growth dark spots can be attributed synergy three external causes: dust particles deposited during fabrication process, pollution by water vapor, and oxygen. On basis a set new experiments performed on benchmark devices, we demonstrate that, for given distribution concentration polluting agent, is thousand times more destructive than oxygen at room temperature. While thermal diffusion causes oxidation both metal interface...

We report on the chemical adsorption of acids and bases indium tin oxide (ITO). Ultraviolet photoelectron spectroscopy was used to measure work function treated ITO atomic surface concentrations were determined by x-ray spectroscopy. The acid treatments yield work-function shifts as high 0.7 eV compared nontreated ITO. Huge in are also obtained for with opposite those acids. These dramatic indicative a double ionic layer. importance an appropriate plasma treatment prior or is discussed terms...

Dye-sensitized solar cells based on co-sensitization of organic dyes having complementary spectral absorption in the visible region resulted a panchromatic response, which exhibited 86% incident monochromatic photon-to-current conversion efficiency region; optimized cell gave short circuit current density 15.5 mA cm−2, an open voltage 685 mV and fill factor 0.70 corresponding to overall 7.43% under simulated light irradiation 100 mW cm−2.

Abstract An optimized unsymmetrical squaraine dye 5‐carboxy‐2‐[[3‐[(2,3‐dihydro‐1, 1‐dimethyl‐3‐ethyl‐1 H ‐benzo[ e ]indol‐2‐ylidene)methyl]‐2‐hydroxy‐4‐oxo‐2‐cyclobuten‐1‐ylidene]methyl]‐3,3‐dimethyl‐1‐octyl‐3 ‐indolium ( SQ02 ) with carboxylic acid as anchoring group is synthesized for dye‐sensitized solar cells (DSCs). Although the π ‐framework of insignificantly extended compared to its antecessor SQ01 , photophysical measurements show that new sensitizer has a much higher overall...

The co-sensitization of two organic dyes (SQ1 and JK2), which are complementary in their spectral responses, shows enhanced photovoltaic performance compared with that an individual dye-sensitized solar cell. power conversion efficiency the co-sensitized dye cell based on newly developed binary ionic liquid (solvent-free) electrolyte gives 6.4% under AM 1.5 sunlight at 100 mW/cm2 irradiation, is higher than cells. incident monochromatic photon-to-current (IPCE) typical absorption peaks 530...

Abstract Several polydimethylsiloxane elastomers were developed and investigated regarding their potential use as materials in dielectric elastomer actuators (DEA). A hydroxyl end‐functionalized was reacted with different crosslinkers the electromechanical properties of resulting investigated. The silicone showing best actuation at lowest electric field further used matrix compounded encapsulated conductive polyaniline particles. These composites have enhanced including increased strain...

Fabrication of a polymer light-emitting device was achieved by laser forward transfer technique using the decomposition thin triazene film XeCl excimer laser. The dry deposition process allows bilayer consisting electroluminescent poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] covered with an aluminum electrode onto receiver substrate. soft results in laterally well resolved pixels (≈500μm), whose fluorescence as electroluminescence spectra remain unaltered. rectifying and smooth...

A one-step process for the synthesis of elastomers with high permittivity, excellent mechanical properties and increased electromechanical sensitivity is presented. It starts from a molecular weight polymethylvinylsiloxane, P1, whose vinyl groups serve two functions: introduction polar nitrile moieties by reacting P1 3-mercaptopropionitrile (1) cross-links to fine tune 2,2′-(ethylenedioxy)diethanethiol (2). This twofold chemical modification furnished material, C2, powerful combination...

Abstract Organic photodetectors are interesting for low cost, large area optical sensing applications. Combining organic semiconductors with discrete absorption bands outside the visible wavelength range transparent and conductive electrodes allows fabrication of visibly photodetectors. Visibly can have far reaching impact in a number areas including smart displays, window-integrated electronic circuits sensors. Here, we demonstrate near-infrared sensitive, photodetector very high average...

We investigate the influence of nanofillers including carbon nanotubes (CNTs) and graphene nanoplatelets on a thermoplastic engineering polymer, polyamide 12 (PA12). The comparison between these two important as to how they structure properties polymer is systematically studied. polymer–nanofiller composites were prepared using twin-screw micro-extruder composite was thereafter hot pressed into thin films. (using wide angle x-ray diffraction differential scanning calorimetry) (through...

The abrasion behavior of an epoxy/carbon nanotube (CNT) nanocomposite was investigated. An experimental setup has been established to perform abrasion, particle measurement, and collection all in one. abraded particles were characterized by size distribution electron microscopy. process carried out with a Taber Abraser, the released collected tube for further investigation. distributions measured scanning mobility sizer (SMPS) aerodynamic (APS) revealed four modes samples. mode corresponding...

Ultrafast optical probing of the electric field by means Stark effect in planar heterojunction cyanine dye/fullerene organic solar cells enables one to directly monitor dynamics free electron formation during dissociation interfacial charge transfer (CT) states. Motions electrons and holes is scrutinized separately selectively shift at selected wavelengths. It shown that only pairs with an effective electron-hole separation distance less than 4 nm are created Frenkel excitons. Dissociation...

Poor cycling stability in lithium-sulfur (Li-S) batteries necessitates advanced electrode/electrolyte design and innovative interlayer architectures. Heterogeneous catalysis has emerged as a promising approach, leveraging the adsorption catalytic performance on lithium polysulfides (LiPSs) to inhibit LiPSs shuttling improve redox kinetics. In this study, we report an ultrathin laminar SnO

Understanding the growth mechanism in molecular organic thin films is fundamental to their applications electronics. We present an extensive study of pentacene on silicon dioxide $({\mathrm{SiO}}_{2})$ using atomic force microscopy. For a fixed substrate temperature ${T}_{s},$ deposition rate \ensuremath{\kappa} found be key parameter controlling nucleation density submonolayer regime and hence transport properties first layer field effect transistors. At ${T}_{s}=338\mathrm{K}$ maximum...

The effect of chenodeoxycholic acid as the coadsorbent with a squaraine sensitizer on TiO2 nanocrystalline solar cells was investigated, and it found that prevents from aggregating nanoparticles but reduces dye loading leading to an interdependent photovoltaic performance. Analysis absorption spectra, incident monochromatic photon-to-current conversion efficiency data showed load well appearance H-aggregates is strongly dependent molar concentration coadsorbent. open circuit voltage...