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Making inorganic solar cells with an airbrush spray

 Low cost, large area deposition of inorganic materials could revolutionize the fabrication of solar cells, LEDs, and photodetectors. The use of inorganic nanocrystals to form these structures is an attractive route as the ligand shell that surrounds the inorganic core allows them to be manipulated and deposited using organic solvents. The most common methods currently used for film formation are spin coating and dip coating, which provide uniform thin films but limit the geometry of the substrate used in the process. The same nanocrystal solutions used in these procedures can also be sprayed using an airbrush, enabling larger areas and multiple substrates to be covered much more rapidly. The trade-off is the roughness and uniformity of the film, both of which can be substantially higher.

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