Tapping the Sun (2)# ChemEng - 化学工程
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By combining two types of semiconductors, the team has made solar cells that register as much as 3% power efficiency. By pairing materials that differ by just the right amount in the energy levels of their valence and conduction bands, in this case CdTe and CdSe nanorods, Alivisatos' group demonstrated that they could eliminate the organic polymer from the hybrid devices and make robust, all-inorganic solar cells using low-tech wet chemistry methods (Science 2005, 310, 462). And just last month,