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(PhysOrg.com) -- University at Buffalo engineers have developed a one-step, low-cost method to fabricate a polymer with extraordinary properties: When viewed from a single perspective, the polymer is rainbow-colored, reflecting many different wavelengths of light.

Solar cells convert sunlight to electricity. But they don’t take advantage of all that solar heat, thereby missing out on the majority of the solar energy reaching the cell. The sun’s heat can be captured to warm up liquid that can then warm a building’s water, but those devices don’t generate electricity