From SiGe Solidification to Flexible Photovoltaic Fibers for Military Applications: Current Status and Development Prospects

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Abstract
The main goal of this review is to comprehensively present the properties of silicon, germanium, and silicon-germanium systems and analyze current possibilities of producing fibers based on them for applications as a photovoltaic fabric for a future soldier. The vision of the future is to produce a feather-light photovoltaic optic fiber, exhibiting mechanical properties typical of Kevlar, enabling power/recharging of portable electric devices while simultaneously protecting against mechanical damage and explosions. This article analyzes, in detail, issues such as the occurrence and mobility of germanium in the environment, the life cycle of SiGe photovoltaic fabrics, ecotoxicological and human health implications, sustainable development strategies and policy implications, and analytical challenges due to low concentrations in the environment. Moreover, the advantages and disadvantages of silicon-based solar cells are analyzed, taking into account various factors, including environmental factors. Finally, the soldier of the future is analyzed.

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