نتایج جستجو برای: ambipolar transport
تعداد نتایج: 274651 فیلتر نتایج به سال:
Methylammonium lead iodide perovskite (CH3NH3PbI3) plays an important role in light absorption and carrier transport in efficient organic-inorganic perovskite solar cells. In this Letter, we report the first theoretical estimation of effective masses of photocarriers in CH3NH3PbI3. Effective masses of photogenerated electrons and holes were estimated to be me* = 0.23m0 and mh* = 0.29m0, respect...
A set of three core-cyanated isoindigos was synthesized by palladium-catalyzed cyanation of core-brominated isoindigos. With decreased LUMO level to -3.88 eV, the dicyanated isoindigo 5 showed ambient-stable electron mobility up to 0.044 cm(2) V(-1) s(-1) in OTFTs with SAMs of TPA, while it exhibited ambipolar charge transport behaviour (0.11 cm(2) V(-1) s(-1) for electrons and 0.045 cm(2) V(-1...
Neoclassical transport simulation code (FORTEC-3D) applicable to non-axisymmetric configurations is developed. A new hybrid simulation model in which ion transport is solved by using the δ f Monte-Carlo method including the finite-orbit-width effects, while electron transport is solved by a reduced ripple-averaged kinetic equation, is adopted. This model makes it possible to simulate the dynami...
Nanotransistors typically operate in far-fromequilibrium (FFE) conditions, that cannot be described neither by drift-diffusion, nor by purely ballistic models. In carbonbased nanotransistors, source and drain contacts are often characterized by the formation of Schottky Barriers (SBs), with strong influence on transport. Here we present a model for onedimensional field-effect transistors (FETs)...
The carrier transport in strain-induced laterally ordered ~InP!2 /~GaP!2 quantum wire ~QWR! samples was examined with a noncontact Haynes–Shockley diffusion measurement which utilized time-resolved scanning cathodoluminescence. An anisotropy in ambipolar diffusion along the @110# and @11̄0# directions ~perpendicular and parallel to the QWRs, respectively! was observed. The temperature dependence...
Improvement of ion heat transport in Heliotron plasmas has been realized by upgrade of ion heating power by using low energy neutral beam (NB) in the Large Helical Device (LHD). Ion internal transport barrier (ITB) (the peaked profile of ion temperature (Ti) with steep gradient in the core region) has been formed and the central Ti of 6.8 keV has been achieved in hydrogen plasma with the line-a...
In this article, we report the studies of various device architectures of organic lightemitting devices (OLEDs) incorporating highly efficient blue-emitting and ambipolar carriertransport ter(9,9-diarylfluorene)s, and their influences on device characteristics. The device structures investigated include single-layer devices and multilayer heterostructure devices employing the terfluorene as one...
Transport is studied for the kinetically stabilized tandem mirror, an attractive magnetic confinement device for achieving a steady-state burning plasma. For a magnetohydrodynamic stable system, three different radial transport models with Bohm, gyro-Bohm, and electron temperature gradient ETG scaling are derived. As a conservative estimate, numerical coefficients in the models are taken to be ...
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