822 research outputs found
Electron-phonon coupling and its evidence in the photoemission spectra of lead
We present a detailed study on the influence of strong electron-phonon
coupling to the photoemission spectra of lead. Representing the strong-coupling
regime of superconductivity, the spectra of lead show characteristic features
that demonstrate the correspondence of physical properties in the normal and
the superconducting state, as predicted by the Eliashberg theory. These
features appear on an energy scale of a few meV and are accessible for
photoemission only by using modern spectrometers with high resolution in energy
and angle.Comment: 4 pages, 4 figures, accepted for publication in Phys. Rev. Let
Improved FTO/NiOx interfaces for inverted planar triple cation perovskite solar cells
Front electrodes of fluorine doped tin oxide (FTO) thin films and hole transporting layers of nickel oxide thin films have been combined to fabricate 1.063 cm2 inverted planar solar cells with cesium-containing triple cation perovskites as absorber layers. Using atmospheric pressure chemical vapor deposition FTO layers were obtained with low sheet resistance, decreased root mean squareroughness, increased transmission,and reduced optical haze values compared to a widely used commercial FTO substrate. Cell performance outperformed the equivalent cells fabricated using the commercial FTO. With full illumination under maximumpowerpoint tracking, a stabilized power conversion efficiency of 13.78 % was obtained for the champion device
Functional modes of proteins are among the most robust ones
It is shown that a small subset of modes which are likely to be involved in
protein functional motions of large amplitude can be determined by retaining
the most robust normal modes obtained using different protein models. This
result should prove helpful in the context of several applications proposed
recently, like for solving difficult molecular replacement problems or for
fitting atomic structures into low-resolution electron density maps. Moreover,
it may also pave the way for the development of methods allowing to predict
such motions accurately.Comment: 4 pages, 5 figure
1 cm2 CH3NH3PbI3 mesoporous solar cells with 17.8% steady-state efficiency by tailoring front FTO electrodes
In this article, we investigate the effects of atmospheric-pressure chemical vapour deposited fluorine doped
tin oxide (FTO) thin films as front electrodes for the fabrication of mesoporous perovskite solar cells with an
active area of 1 cm2 and compare them with the use of a commonly used commercial transparent
conducting oxide. The effects of sheet resistance (Rs) and surface roughness are both closely linked to the
film thickness. In order to separate out these effects the characteristics of the deposited FTOs were carefully
controlled by changing the fluorine doping levels and the number of passes under the coating head to give
films of specific thicknesses or Rs. Under AM 1.5 Sun illumination and maximum power point tracking, the
optimised FTOs yielded a steady-state power conversion efficiency of 17.8%, higher than that of the
reference cell fabricated from the commercial FTO. We attribute the improved cell efficiency to increased
fill factor and a lower series resistance resulting from the lower Rs and increased thickness of these FTO
substrates. This low-cost and viable methodology is the first such type of study looking independently at the
significance of FTO roughness and resistance for highly efficient mesoporous perovskite solar cells
Nanoscale Analysis by EFTEM and FIB-Tomography for Optimization of Thin-Film Silicon Solar Cells
Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 - August 5, 201
Опухоль брюшной стенки - грыжа спигелевой линии, содержащая метастатическую карциному с невыявленным первичным очагом
АДЕНОКАРЦИНОМАБРЮШНАЯ СТЕНКАГРЫЖИКАРЦИНОМАКОЛОРЕКТАЛЬНЫЕ НОВООБРАЗОВАНИЯНОВООБРАЗОВАНИЯТОЛСТАЯ КИШК
Correction: Design and simulation of a wireless saw\u2013pirani sensor with extended range and sensitivity
The authors wish to make the following erratum to Reference [1]: The Table 2 below contained false reference numbers. The references were corrected. The corrected references are also available below. The authors would like to apologize for any inconvenience caused to the readers by these changes. Table 2. Detection principles and pressure ranges of micro-electro-mechanical system (MEMS) Pirani gauges. (Table Presented)
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