Sunday, December 7, 2014

sprayLD - New technique offers spray-on solar power

Dr. Illan Kramer of The Edward S. Rogers Sr. Department of Electrical & Computer Engineering and IBM has invented a new way to spray solar cells onto flexible surfaces using miniscule light-sensitive materials known as colloidal quantum dots (CQDs)—a major step toward making spray-on solar cells easy and cheap to manufacture.

Thumbnail image of graphical abstract

Kramer, I. J., Minor, J. C., Moreno-Bautista, G., Rollny, L., Kanjanaboos, P., Kopilovic, D., Thon, S. M., Carey, G. H., Chou, K. W., Zhitomirsky, D., Amassian, A. and Sargent, E. H. (2014), Efficient 

Spray-Coated Colloidal Quantum Dot Solar Cells. Adv. Mater.. doi: 10.1002/adma.201403281

A colloidal quantum dot solar cell is fabricated by spray coating under ambient conditions. By developing a room temperature spray coating technique and implementing a fully automated process with near monolayer control—an approach termed as sprayLD—an electronic defect is eliminated resulting in solar cell performance and statistical distribution superior to prior batch-processed methods along with hero performance of 8.1%.

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