Tapping the Sun (3)# ChemEng - 化学工程
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IN RELATED work, Heeger, Kwanghee Lee, and their coworkers demonstrated that tandem polymer solar cells—a design in which two cells are connected in series—can be fabricated entirely using inexpensive solution-phase methods. Connecting two cells made from semiconductors with distinct band gaps broadens the range of wavelengths the system can collect to generate electricity. In contrast to other researchers who have employed high-vacuum deposition methods to prepare tandem cells, the UC Santa Bar