As a result, candidates will be awarded double grades ranging from 9-9, 9-8 and so on, down to the lowest 1-1 grade.
By introducing CIGS absorber layer with a double grading Ga/(Ga+In) profile, the power conversion efficiency of the double gradient band gap cell is superior to that of uniform band-gap cell through extending absorption of near-infrared wavelength range.
This study presents a new design that uses a combination of a graded hole transport layer (GH) structure and a gradually doped emissive layer (GE) structure as a double graded (DG) structure to improve the electrical and optical performance of white organic light-emitting diodes (WOLEDs).
The experimental and simulation studies have shown that double grading in the CIGS absorber layer has greatly improved the performance of single-junction CIGS cells [40, 41].
Figure 2b shows the energy-band diagram of CIGSe device with (dotted), without double grading (continuous line) and the energy-band-gap profile of the CIGS absorber layer used in simulation is given in Fig. 2b, inset.
Another big change – in both Wales and England – has been the advent of a new combined science GCSE, which is awarded as a double-grade, replacing the old science, additional science and further additional science GCSEs.
The argument that over-generous teacher assessment was disguising poor writing skills could be overcome by following the old system of marking foreign-language O-levels: a double-grade, one for written, one for oral.
Steele, who is fifty-three, looked much like the other businessmen heading home, except for the fact that he kept his phones in a Faraday bag — a pouch, of military-tested double-grade fabric, designed to block signal detection.
Two-dimensional simulations performed here provide a physical explanation for the improved analog device characteristics given by the double gate graded-channel MOSFETs, showing significantly reduced electric field and hence impact ionization rate, which is well known to plague the output characteristics of SOI MOSFETs in the low temperature range.
