The lead-free perovskite solar cells (PSCs) have drawn a great deal of research interest due to the Pb toxicity lead halide perovskite. CH3NH3SnI3 is viable alternative CH3NH3PbX3, because it has narrower band gap 1.3 eV and wider visible absorption spectrum than progress fabricating tin iodide PSCs with good stability stimulated studies these based greatly. In paper, we study influences various parameters on cell performance through theoretical analysis device simulation. It found in...

A solution processed MoO3/PEDOT:PSS bilayer structure is used as the hole transporting layer to improve efficiency and stability of planar heterojunction perovskite solar cells. Increased extraction restrained erosion ITO by PSS are demonstrated in optimized device due incorporation an MoO3 layer.

Through tip-induced dehalogenation and retro-Bergman ring-opening reaction of fully chlorinated anthanthrene (C14Cl10), the cyclo[14]carbon (C14) was prepared. Owing to its distinctive physical properties, C14 holds potential serve as core unit functional electronic devices. Herein, density theory combined with non-equilibrium Green's function technique used investigate transport properties molecular devices composed molecules graphene electrodes, systematically. We find that polyynic...

The authors demonstrate high response organic ultraviolet (UV) photodetector (PD) using 4,4′,4″-tri-(2-methylphenyl phenylamino) triphenylaine (m-MTDATA) and tris-(8-hydroxyquinoline) gallium (Gaq3) to act as the electron donor acceptor, respectively. m-MTDATA:Gaq3 blend device shows a photocurrent of 405μA∕cm−2 at −8V, corresponding 338mA∕W under an illumination 365nm UV light with intensity 1.2mW∕cm2. is attributed enhanced dissociation geminate hole-electron pairs in distributed...

The authors demonstrate an organic ultraviolet (UV) photodetector (PD) device in which 1,3,5-tris(3-methylphenyl-phenylamino)-triphenyamine and 1,3,5-tris(N-phenylbenzimidazol-2-yl)-benzene were used as the electron donor acceptor, respectively. PD diode offers responses of 75.2 22.5 mA/W 365 330 nm UV light with 1.0 mW/cm2 intensities illuminate through anode cathode sides, It is interesting that only planar heterojunction structure can provide special response feature while...

A phosphorescent (Ph) cyclometallated rhenium (I) (ReI) complex was synthesized by reacting 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline with pentacarbonylbromorhenium in refluxing toluene solutions. The precipitates were easily sublimed to obtain a pure electrically neutral carbonyl diamine ReI complex, (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline)Re(CO)3Br. Re used as an orange emitting dopant 4,4′-N,N′-dicarbazole-biphenyl host fabricate Ph organic light-emitting diodes (PhOLEDs)....

Spectral single and stable green exciplex emission was demonstrated from organic light-emitting diodes (OLEDs) with 4,4′,4″-tris[3-methylphenyl(phenyl)amino] triphenylamine 4,7-diphenyl-1,10-phenanthroline that function as electron donor (D) acceptor (A), respectively. As 8-hydroxyquinoline aluminum (Alq3) attached to the layer, electroluminescent (EL) properties of two exciplex-type OLEDs D/A-bilayer D:A mixture layer configurations were markedly improved, i.e., a peak current efficiency...

We demonstrate a cascade-energy-level alignment based organic photovoltaic cell by using stacking three materials with appropriate energy levels. A structure of ITO/4,4′,4″-tris[N,(3-methylphenyl)-N-phenylamino]-triphenylamine (m-MTDATA)/copper phthalocyanine (CuPc)/fullerene (C60)/4,4′-N,N′-dicarubreneazolebiphenyl (BCP)/LiF/Al was shown to have power efficiency enhancement in more than 30% over that standard reference (ITO/CuPc/C60/BCP/LiF/Al), which has only one exciton-dissociation...

The transport properties of water through a nanochannel influenced by the direction an external electric field has been investigated using molecular dynamics simulations. Water molecules flow unidirectionally across under uniform without osmotic pressure. It is found that plays important role in interactions and dipole orientations nanochannel, accordingly changing net flux dramatically. Most importantly, critical angle (θC) between axis found. average increases as θ for θ≤θC but decreases...

White light is emitted by an organic light-emitting diode inserting two blend layers of m-MTDATA:Al(DBM)(3) and TPD:Bphen between m-MTDATA hole-transporting layer a Bphen electron-transporting layer, where m-MTDATA, TPD, Al(DBM)(3), are 4,4('),4('')-tris[methylpheny(phenyl)amino]-triphenylamine, N,N(')-bis(3-methylphenyl)-N,N(')-diphenylbenzidine, tris(dibenzoyl methane)-aluminum, 4,7-diphenyl-1,10-phenanthroline molecules, respectively. The white-light spectrum consists four broad bands...

In order to study the dependence of water solubility and hydration behavior nanoparticles on their surface polarity, we designed polar with varying polarity by assigning atomic partial charge C60. The nanoparticle is enhanced several orders magnitude after introduction polarity. Nevertheless, when grows beyond a certain value (qM), continuously decreases level nonpolar nanoparticle. It should be noted that such qM comparable variety functional groups. behaviors were then studied investigate...

The authors demonstrate a considerable increase in current efficiency of fac-tris(2-phenylpyridine) iridium doped phosphorescent organic green-light emitting diode which thin 4,7 dipheny-1,10-phenanthroline (Bphen) layer acts as cleaving layer. As 4nm Bphen divides the (EML) into two sub-EMLs, maximum 53cd∕A (corresponding to external quantum 15%) is obtained, higher for 2.3 folds than that device without it, especially increases 64% over reference at luminance 40000cd∕m2. are demonstrated...

Although the nonmonotonic variation in diffusion coefficients of alcohol and water with changing concentrations aqueous solutions has been reported for many years, underlying physical mechanisms remain unclear. Using molecular dynamics simulations, we investigated methanol solutions. Our findings reveal that is co-influenced by hydrogen bonding hydrophobic ends molecules. A stronger bond (HB) network a higher concentration molecules both enhance correlations, thereby slowing solution. As...

Efficient white organic light-emitting diodes (WOLEDs) in which the blue and red emissions come from bis[(4,6-diflourophenyl)pyridinato-N,C2'](picolinato)iridium(III) bis[2-(2'-benzothienyl)pyridinato-N,C3'(acetylacetonato)iridium(III) doped 4,4'-N,N'-dicarbazole-biphenyl (CBP) layers while green emission comes an ultrathin non-doped fac-tris[2,5-di(4-methoxyphenyl) pyridinato-C,N]iridium(III) [Ir(dmoppy)3] sub-monolayer are demonstrated. The electroluminescent spectra of devices can be fine...

We demonstrate a fac-tris(2-phenylpyridine) iridium-based electrophosphorescent organic green-light emitting diode with considerably reduced current-efficiency roll off at high current density. Such low of efficiency was achieved by inserting nondoped 4,4′-N,N′-dicarbazole-biphenyl (CBP) layer and tris-(8-hydroxy-quinoline) aluminum (Alq3) between the electron-transporting layers to diffuse excitons from layer. The Alq3 is found contribute as complementary green fluorescent emitter Thus,...

We demonstrate a very high voltage based organic photovoltaic (PV) diode by stacking two ultraviolet (UV) sensitized PV diodes. It shows an open-circuit (Voc) of 4.34 V under 365 nm UV irradiation with intensity 2 mW/cm2. Due to the especially Voc device could be integrated in electronic logic device, as result or low potential states can harvested directly not, respectively. The difference between and is great temporal response fast, which make it attractive promising candidate application...

Abstract We demonstrate high-efficient white organic light-emitting diodes (WOLEDs) based on triplet multiple quantum well (MQW) structure and focus the influence WOLEDs through employing different potential barrier materials to form type-I type-II MQWs, respectively. It is found that MQW 1,3,5-tris( N -phenyl-benzimidazol-2-yl)benzene as layer (PBL) offers high electroluminescent (EL) performance. That say, maximum current efficiency power are achieved at about 1,000 cd/m 2 with 16.4 cd/A...

We have demonstrated a high-efficiency electrophosphorescent device doped with bis(2-phenyl-benzoimidazole) iridium (III) acetylacetonate triplet lifetime in the range of nanoseconds. Then mixed host was sandwiched by two single-host layers. Multi-recombination zones were formed emission layer. Such structure could increase proportion recombined carriers to injected and extend recombination zone. As result, maximum external quantum efficiency 18.6% attained due presence multi-recombination...