US PV technology company Alta Devices Inc. announces the launch of its fourth-generation solar cell technology (Gen4), which can be used to generate substantial power over small surfaces with minimal impact to vehicle design criteria of unmanned aerial vehicles (UAV), automobiles, sensors, and more. According to the company, at the solar cell level, the Gen4 technology provides a weight reduction of 40 percent or a power-to-weight improvement of 160 percent over the earlier Gen3 version. If Alta’s Gen4 technology had been available and used on the aircraft »Solar Impulse 2« instead of crystalline silicon, the result in weight savings would have been up to 100 kg, says Alta Devices. In addition, this technology would have provided up to 15 percent more solar power.
Alta Devices Gen4 product is a lightweight, flexible solar cell produced with single-junction GaAs technology. Alta has now transitioned its production to Gen4, utilizing cells that are significantly thinner than the previous generation while continuing to improve electrical performance. This translates to going from a ratio of 240 g/m2 to 170 g/m2 at the matrix level, including cell-to-cell interconnects, ribbons and protective diodes. The reduced thickness of the Gen4 cells also results in a smoother, conformal and more aerodynamic surface when integrated into solar vehicles and UAV platforms.
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