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  • Water droplets direct self-assembly process in thin-film materials

    Spherical solar cells self-assembled from flower shaped flat Si leaflets with thicknesses of 2 m: (A) Schematic illustration of steps for fabricating a spherical shaped Si solar cell; (B) Optical image of a complete device consisting of the folded spherical Si shell, inner glass bead, and printed silver electrodes; (C) Magnified view of the silver wire connected to the top contact of the spherical device; (D) Current density (J) - voltage (V) characteristics of a spherical solar cell under AM1.5 simulated sunlight irradiation, with and without a white diffuse reflector.

    Spherical solar cells self-assembled from flower shaped flat Si leaflets with thicknesses of 2 m: (A) Schematic illustration of steps for fabricating a spherical shaped Si solar cell; (B) Optical image of a complete device consisting of the folded spherical Si shell, inner glass bead, and printed silver electrodes; (C) Magnified view of the silver wire connected to the top contact of the spherical device; (D) Current density (J) - voltage (V) characteristics of a spherical solar cell under AM1.5 simulated sunlight irradiation, with and without a white diffuse reflector.

    Photo courtesy Ralph Nuzzo

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  • Editor's note: To contact Ralph Nuzzo, call 217-244-0809; e-mail: r-nuzzo@illinois.edu.