The advantages of germanium substrates over the more common silicon-based solar cells are the smaller size and weight as well as higher efficiency (up to 40% for Ge-based concentrated photovoltaics versus 20% in commercial Si-based modules 12). These solar cells are not common in terrestrial applications because of the cost of their manufacture.
The strategic amalgamation of other semiconductor substances like GaAs (Gallium Arsenide) onto the Ge base culminates in multiple junctions that synergistically elevate the overall efficacy of solar cells. Contrasting silicon-based brethren, germanium solar cells showcase reduced recombination frequencies courtesy of superior conductive traits.
Nonetheless, monetary considerations retain paramount importance while transitioning from laboratory-scale fabrication towards commercialization. In the realm of high-efficiency solar power systems, a profound enigma lies in the utilization of germanium as a semiconductor material.
The ingredient that is germanium plays a pivotal role in high-efficiency solar cells, attributable to its unique characteristics and harmonious relationship with other materials.
The interface defect layer is added, which can be closer to reality. Compared with the previous simulation, the efficiency is greatly improved. In recent years, non-toxic germanium-based perovskite solar cells have attracted wide attention, but the efficiency is not high.
The base layer or substrate of these cells often boasts germanium content due to its ability to offer a steadfast platform for ensuing layers – an element that significantly impacts the system’s overall efficacy. Of late, there’s been an observable surge of interest revolving around multi-junction solar cells leveraging germanium substrates.
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