LOS ALAMOS, N.M., Jan. 8, 2017 — A window architecture that includes two different layers of low-cost colloidal quantum dots tuned to absorb different parts of the solar spectrum could be used to build double-pane solar windows that generate electricity more efficiently while providing insulation and shading. Spectral tunability of the quantum dots enables the creation of stacked multilayered luminescent solar concentrators (LSCs). Solar-spectrum splitting allows higher- and lower-energy photons to be processed separately. 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