3 ms·
We have solar cells which have exceeded the Shockley-Queisser limit. It's possible to exceed the Shockley-Queisser limit by having a multiple junction solar cel
by gene-h 7y ago
We have solar cells which have exceeded the Shockley-Queisser limit. It's possible to exceed the Shockley-Queisser limit by having a multiple junction solar cell. In fact the world record for conversion of sunlight is 46%[0]. Of course this was with concentrated sunlight. Without concentrated sunlight multijunction solar cells have achieved 30.2% efficiency[1]. Multijunction solar cells are somewhat expensive though. Based on the current rate of advancement of perovskite solar cells it's possible we could see perovskite silicon tandem solar cells with 30% or higher efficiency in the coming months. In december, perovskite silicon tandem solar cells achieved an efficiency of 28%[2].
Still, something's fishy about this vehicle.
[0]https://www.ise.fraunhofer.de/en/press-media/press-releases/2014/new-world-record-for-solar-cell-efficiency-at-46-percent.html https://www.ise.fraunhofer.de/en/press-media/press-releases/...
[1]https://www.ise.fraunhofer.de/en/press-media/press-releases/2016/30-2-percent-efficiency-new-record-for-silicon-based-multi-junction-solar-cell.html https://www.ise.fraunhofer.de/en/press-media/press-releases/...
[2]https://www.oxfordpv.com/news/oxford-pv-perovskite-solar-cell-achieves-28-efficiency https://www.oxfordpv.com/news/oxford-pv-perovskite-solar-cel...
- dmitrygr 7y agomy comment remains: if they commercialized such efficient cells, why bother making a car? Why not take the money and go buy a small-to-medium-sized country to retire in?
- gnode 7y agoMore efficient conversion of sunlight electricity doesn't mean the cells are cost effective for putting on a house. On a luxury car like this, area is constrained and money is no object, so it may make sense to use otherwise prohibitively expensive cells to win a few extra percent efficiency. Similarly, such multi-junction cells are used on spacecraft, where the lower mass per watt makes it worthwhile.