During the last two decades, considerable progress has been made with the device efficiency and lifetime of organic lightemitting diodes (OLEDs), enabling their application in flatpanel displays and solid-state lighting. To realize high-performance, full-color OLED devices as commercial products, it is necessary to further improve the power efficiency and lifetime of the devices. To date, resea...

Effects of cross-linking by-products (residues) of polyethylene on space charge accumulation and decay are investigated in the paper using the pulsed electro-acoustic technique. Space charge profiles have shown a great variation both in the charge initiation over the voltage ramping up process and later on long term stressing and decay (volts off) among the samples subjected to different condit...

The demand of exotic ions prior to their injection into an accelerator has driven the development of the charge breeding method. Existing facilities like REX-ISOLDE or ISAC at TRIUMF are already using a charge state booster for the post acceleration of radioactive ions. Planned facilities like MAFF, SPES, SPIRAL II and EURISOL have identified the need of a breeding system because of the demand ...

Pellet injection is used for fuelling and controlling discharges in tokamaks, it foreseen ITER. During pellet injection, a movement of the ablated material towards low-field side (or outward major radius direction) occurs because inhomogeneity magnetic field. Due to complexity theoretical models, computer codes developed simulate cross-field drift are computationally expensive. Here, we present...

The lateral charge transport in films comprising metal complexes bound to DNA monolayers on Si electrodes was measured by scanning electrochemical microscopy (SECM) in the steady-state feedback mode. Single-stranded (ss) DNA monolayers covalently bonded to the Si surface were prepared by automated solid-phase synthesis on hydroxyl-terminated n-alkyl monolayers at atomically flat Si(111)–H surfa...

We investigate the mechanism of operation of hybrid organic/colloidal quantum dot light emitting devices QD-LEDs . Novel quantum dot QD deposition methods allow us to change the location of an emissive QD monolayer within a QD-LED multilayer structure. We find that the quantum efficiency of devices improves by 50% upon imbedding QD monolayers into the hole transporting layer 10 nm away from the...

We report results of an experimental study of laser-wakefield acceleration of electrons, using a staged device based on a double-jet gas target that enables independent injection and acceleration stages. This novel scheme is shown to produce stable, quasi-monoenergetic, and tunable electron beams. We show that optimal accelerator performance is achieved by systematic variation of five critical ...

We theoretically introduce a mesoscopic pendulum from a triple dot. The pendulum is fastened through a singly occupied dot (spin qubit). Two other strongly capacitively coupled islands form a double-dot charge qubit with one electron in excess oscillating between the two low-energy charge states (1,0) and (0,1). The triple dot is placed between two superconducting leads. Under realistic conditi...

In this report, the distribution and deviation of electric field in the active medium of the TE CO2 laser has been investigated due to the injection of net electron charge beam as a plasma generator. Some parameters of system have been considered, such as density and mean-free-path of injected charge beam. The electric potential and electric field distribution have been simulated by solving the...

Introduction Abnormal neural impulses in the nervous system may lead to various diseases and disabilities. High frequency alternating currents (HFAC) has been used to block the propagation of such impulses and improve the symptoms or disabilities. The technique is safe, reversible, and relatively selective, and its reliability, the optimum stimulation parameters, and elimination of the onset re...