Scientists and engineers worldwide are working to make solar energy more widely affordable and available through the discovery of low-cost production technologies. One area showing promise is flexible thin film solar cells, which require a minimum amount of material to be produced and can also be produced en masse through roll-to-roll processing. Cadmium telluride (CdTe) is one example of this technology and already has a market share second only to traditional silicon-based solar cells, with the advantage of being the cheapest to produce. The main drawback of CdTe right now is that it requires sunlight to pass through a transparent supporting layer, limiting carrier choices only to transparent materials.
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