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The measurement procedures for the determination of the external quantum efficiency (EQE) of individual subcells in a monolithic, series connected stack of solar cells are known since the 1980s [1]. There, the importance of the choice of appropriate bias light spectrum and bias voltage was already addressed. However, especially when measuring the EQE of Germanium bottom subcells in monolithic III-V...
Interpreting the current- voltage I-V characteristic of the solar cells gives important information about functional parameters. The paper presents a comparison between the most important techniques of raising the I-V characteristic for solar cells. The improvement realized for raising the characteristic using a capacitor as a load resistance is also presented. A new method to determine the series...
As it was the mechanical noise used for diagnostic of machine in the past, the electronic noise can be used as diagnostic tool for detection defects in electronical devices and systems in the future. This paper deals with comparisons of noise spectroscopy and detection of microplasma noise sources in the three new type of solar cells G1, G3 and G5. When high electric is applied to PN junction with...
Thinned III-V multi-junction solar cells can realize the advantages of being high-efficiency and light-weight, as such these cells meets the requirement for higher W/kg and W/m3 solar panels. Here we report the development results of a thin-film InGaP/GaAs dual-junction (TF2J) solar cell. In this paper, we study the radiation resistance of the TF2J cells with efficiency of 20-23% under AM0, 1sun at...
AlGaAs tunnel junctions are shown to be well-suited to concentrated photovoltaics where temperatures and current densities can be dramatically higher than for 1-sun flat-panel systems. Detailed comparisons of AlGaAs/AlGaAs tunnel junction experimental measurements over a range of temperatures expected during device operation in concentrator systems are presented. Experimental and simulation results...
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