AI Article Synopsis
- Silicon microwire arrays are emerging as efficient and cost-effective solar cells, with the study reporting conversion efficiencies as high as 10.6% for 1 cm² devices.
- Key performance metrics include an open-circuit voltage of 0.56 V, a short-circuit current density of 25.2 mA/cm², and a fill factor of 75.2%, utilizing a thin 25 μm silicon absorption layer.
- The efficiency improvement from 8.71% to 10.6% is achieved by adding a 200 nm thick SiO2 coating, which significantly reduces reflection in the visible spectrum.
Article Abstract
Silicon microwire arrays have attracted considerable attention recently due to the opportunity they present as highly efficient and cost-effective solar cells. In this study, we report on efficient Si microwire array solar cells with areas of 1 cm(2) and Air Mass 1.5 Global conversion efficiencies of up to 10.6%. These solar cells show an open-circuit voltage of 0.56 V, a short-circuit current density of 25.2 mA/cm(2), and a fill factor of 75.2%, with a silicon absorption region that is only 25 μm thick. In particular, the maximum overall efficiency of the champion device is improved from 8.71% to 10.6% by conformally coating the wires with a 200 nm thick SiO2 layer. Optical measurements reveal that the layer reduces reflection significantly over the entire visible range.
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| http://dx.doi.org/10.1021/nn401776x | DOI Listing |
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