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In this study, the optoelectronic properties of a monolithically integrated series-connected tandem solar cell are simulated. Following the large success of hybrid organic-inorganic perovskites, which have recently demonstrated large efficiencies with low production costs, we examine the possibility of using the same perovskites as absorbers in a tandem solar cell. The cell consists in a methyl ammonium...
Experts predict that copper plated metal contacts will eventually become the dominant metallisation for silicon wafer-based technologies once several key issues are solved. Of particular importance is the adhesion strength and hence durability of such plated contacts with many of the largest cell manufacturers currently nervous about considering such metallisation for large-scale manufacturing due...
We have simulated the performance of heterojunction with intrinsic thin-layer (HIT) solar cells on n-type c-Si substrates using the numerical simulator automat for simulation of heterostructures (AFORS-HET), with emphasis on the effect of density of defect states (DOS) in both p-type hydrogenated amorphous silicon ( -Si:H) emitter and intrinsic -Si:H buffer layers. A detailed and accurate DOS distribution,...
This paper reports recent experimental work on single junction II-VI semiconductor heterostructure solar cells consisting of n-type CdSe and p-type ZnTe grown by molecular beam epitaxy on GaSb substrates. The structural and crystalline properties are characterized using high-resolution X-ray diffraction measurements. The current-voltage measurements reveal expected diode-like rectifying characteristics...
The passivation potential of PECVD SiNx deposited on undiffused p-type Si surfaces is investigated. The influence of post-deposition annealing temperature and the film parameters (refractive index and thickness) on the implied Voc of textured, commercial grade, p-type CZ wafers was studied. Improvement in the implied Voc values of SiNx passivated CZ wafers was observed for two different SiNx films...
High-efficiency multifunction solar cells are attracting a great deal of attention for both space and terrestrial applications. We proposed the monolithic integration of the II/VI (ZnCdMg)(SeTe) and the III/V (InAlGa)(AsSb) material systems for multijunction solar cells. These material systems have direct bandgap, zinc blende, quaternary alloys, lattice-matched to GaSb substrates that cover the entire...
Monolithically integrated high-efficiency multijunction solar cells are highly desirable for both space and terrestrial applications. This paper reports recent experimental work on newly proposed multijunction solar cell designs that utilize lattice-matched II/VI CdZnSeTe and III/V AlGaAsSb materials grown on GaSb substrates. Single ZnTe layers and thin CdZnTe/ZnTe quantum wells have been grown on...
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