The authors have built a microwave Fabry-Pérot resonator made of diamond-machined copper mirrors coated with superconducting niobium. Its damping time (Tc=130ms at 51GHz and 0.8K) corresponds to finesse 4.6×109, the highest ever reached for in any frequency range. This result opens many perspectives quantum information processing, decoherence nonlocality studies.

Drop on Demand inkjet printing is an attractive method for device fabrication. However, the reliability of key steps still challenging. This explains why versatile functional inks are needed. Epoxy based ink described in this study could solve critical issue because it can be printed with low drawbacks (satellites droplets, long-lived filaments, etc.). Moreover, a wide concentration range solute allows fabrication films from thin to high aspect ratio. Optimizing experimental parameters...

The water transfer printing method is used to patterned films on random three-dimensional objects. This industrially viable technology has been demonstrated intimately wrap metallic and polymeric around different materials. avoids the use of rigid substrate during step. Patterns can be transferred objects without folds even when holed, addressing a challenging issue in field conformal electronics. technique allows high film bending properties reached. promising enables us integrate...

In the field of π-conjugated nanohoops, size macrocycle has a strong impact on its structural characteristics, which in turn affect electronic properties. this work, we report first experimental investigations linking nanohoop to charge transport properties, key property organic electronics. We describe synthesis and study example cyclocarbazole possessing five constituting building units, namely [5]-cyclo-N-butyl-2,7-carbazole, [5]C-Bu-Cbz. By comparison with shorter analogue,...

Since the first applications of nanohoops in organic electronics appear promising, time has come to go deeper into their rational design order reach high-efficiency materials. To do so, systematic studies dealing with incorporation electron-rich and/or electron-poor functional units on have be performed. Herein, synthesis, electrochemical, photophysical, thermal, and structural properties two [4]cyclo-2,7-carbazoles, [4]C-Py-Cbz, [4]C-Pm-Cbz, possessing electron-withdrawing nitrogen atoms...

A new host material based on the 2,7,4′-substituted spirobifluorene platform has been designed and used in single-layer phosphorescent OLED with very high efficiency (EQE = 13.2%) low turn-on voltage (2.4 V). This performance is among best reported for green PhOLEDs may open avenues design of materials devices.

We report herein a detailed structure-properties relationship study of the first examples electron-rich 4-substituted spirobifluorenes for organic electronic applications, namely, 4-phenyl-N-carbazole-spirobifluorene (4-PhCz-SBF) and 4-(3,4,5-trimethoxyphenyl)-spirobifluorene (4-Ph(OMe)3-SBF). The incorporation moieties in ortho position biphenyl linkage (position C4) induces unique properties, very different from those previously described literature this family semiconductors. Both dyes...

Abstract New families of donor/acceptor semiconductors based on dihydroindeno[1,2‐ a ]fluorene and dihydroindeno[2,1‐ b are reported. Due to the spiro bridges, this new generation dihydroindenofluorenes allows spatial separation HOMO LUMO, which retains high E T value dihydroindenofluorene backbone excellent physical properties. This control electronic properties has allowed second be obtained with strongly enhanced performance in green sky‐blue phosphorescent organic light‐emitting diodes...

Abstract Nanorings, which are macrocycles possessing radially directed π‐orbitals have shown fantastic development in the last ten years. Unravelling their unusual electronic properties has been one of driving forces this research field. However, and despite promising properties, incorporation organic devices remains very scarce. In work, we aim to contribute bridge gap between electronics nanorings by reporting synthesis, structural an field‐effect transistor (OFET) a cyclic tetracarbazole,...

Macrocycles possessing radially oriented π-orbitals have experienced a fantastic development. However, their incorporation in organic electronic devices remains very scarce. In this work, we aim at bridging the gap between electronics and nanorings by reporting first detailed structure–properties–device performance relationship study of functional materials based on nanoring system. Three [4]cyclo-N-alkyl-2,7-carbazoles bearing different alkyl chains nitrogen atoms been synthesized...

A bridged <italic>syn</italic> triphenylene derivative functionalized with dicyanovinylene units <bold>(2,1-b)-IF(C(CN)2)2</bold> has been synthesized, characterized and successfully used as an active layer in n-channel OFETs. Pseudo CMOS inverters made of n-type -based OFETs have fabricated.

Nowadays, phosphorescent organic light-emitting diodes (PhOLEDs) is a widespread technology, in which all the high-performance devices are constructed on stack of different layers called multi-layer (ML-PhOLEDs). Thanks to these functional layers, injection, transport, and recombination holes electrons emissive layer (EML) significantly improved, allowing reach high performances. In this ideal single-layer PhOLEDs (SL-PhOLEDs), with very simple only constituted by electrodes EML. These...

In this work, we wish to report the first member of a new family organic semiconductors constructed on meta dihydroindacenodithiophene core, that is, 2,2'-(2,8-dihexyl-4,6-dihydro-s-indaceno[1,2-b:7,6-b']dithiophene-4,6-diylidene)dimalononitrile (called meta-IDT(═C(CN)2)2). The properties molecule were studied in detail through structure-properties relationship study with its regioisomer, 2,2'-(2,7-dihexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-4,9-diylidene)dimalononitrile...

In this letter, we present the synthesis of a new family π-extended dithieno[b,f]phosphepines. The Pd-catalyzed direct arylation allows introduction various substituents, which tune absorption/emission in visible range as well redox properties. All those modifications were rationalized through DFT calculations. physical properties ambipolar phosphepine with diphenylamino substituents inspired us to use it semiconductor p-type organic field-effect transistors (OFETs).

Abstract In the last ten years, development of π‐conjugated nanohoops has been considerable owing to their remarkable properties. However, date, incorporation in organic electronic devices remains very scarce. this work, first high‐performance device (i.e., phosphorescent light‐emitting diode, PhOLED) incorporating a nanohoop ([4]‐cyclo‐ N‐ butyl‐2,7‐carbazole, [4]C‐Bu‐Cbz ) is reported, revealing potential electronics. Thus, using red phosphor Ir(MDQ) 2 (acac), ‐based PhOLED displays high...

Abstract The performances of simplified single‐layer phosphorescent organic light‐emitting diodes (SL‐PhOLEDs) have significantly increased and they now appear to be a promising alternative multi‐layer PhOLEDs. blue white emissions, far more challenging than all the other colours, are still particularly desired. Herein, high efficiency host material for emitting SL‐PhOLED using emitter FIr6 is reported, which interesting as it displays an emission at shorter wavelengths well‐known FIrpic...

Abstract Polycrystalline silicon vertical thin film transistors (VTFTs) were fabricated employing a five-mask process. The electrical characterization was carried out to elucidate physical parameters, especially threshold voltage and effective mobility. gap density of states (DOS) VTFT analyzed using the field effect method, whereas deep tail fitted by Gaussian exponential distributions, respectively. Grain boundary barrier height calculated an analytic method. At same time, activation...

Hybrid nanomaterials made of inorganic nanocomponents dispersed in an organic host raise increasing interest as low-cost solution-processable functional materials. However, preventing phase segregation while allowing a high doping content remains major challenge, and usual methods require functionalization step prior integration. Herein, we report new approach to design such nanocomposite which ceramic-like metallic nanocluster compounds are embedded at 10 wt % copolymers, without any...

The electrical stabilities of n-type Organic Field-Effect Transistors (OFETs) based on dihydroindeno[1,2-<italic>b</italic>]fluorene and dihydroindeno[2,1-<italic>b</italic>]fluorene derivatives have been studied.

A bridged pentaphenylene derivative functionalized with dicyanovinylene units LPP(C(CN)2)2 has been designed, synthesized and characterized. The optical electrochemical properties have carefully studied through a combined experimental theoretical approach compared those of two derivatives bearing methylenes (LPP) or carbonyl (LPP(O)2) on the bridgeheads. which possesses very low LUMO level, ca. −4.02 eV, successfully used as an active layer in n-channel OFETs using epoxy based photoresist...

The integration of electronics into the process flow additive manufacturing 3D objects is demonstrated using water soluble films as a temporary flexible substrate. Three variants are detailed to evaluate their capabilities meet requirements. One them, called transfer printing, shows best ability fabricate onto additively manufactured objects. Moreover, curved capacitive touchpad hidden by color successfully transferred objects, showing potential application this technology fully discrete or...

The photoexcited state in superconducting metals and alloys was studied via pump-probe spectroscopy. A pulsed Ti:sapphire laser used to create the non-equilibrium far-infrared pulses of a synchrotron storage ring, which is synchronized, measured changes material optical properties. Both time- frequency- dependent photoinduced spectra Pb, Nb, NbN, Nb{0.5}Ti{0.5}N, Pb{0.75}Bi{0.25} thin films were low-fluence regime. time data establish regions where relaxation rate dominated either by phonon...