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Adv.Mater.25年纪念综述:Bulk Heterojunction Solar Cells: 机理研究
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最新一期的Advanced Materials刊发了加州大学芭芭拉分校 大牛Alan J. Heeger撰写的Bulk heterojunction太阳能电池综述，在其中详细讨论了Bulk heterojunction太阳能电池机理， The review concludes with a summary of the problems to be solved to achieve the predicted power conversion effi ciencies of >20% for a single cell。文章19页，引文51篇. Experiments have verified the existence of the BHJ nanostructure, but the morphology remains complex and a limiting factor. Three steps are required for generation of electrical power: i) absorption of photons from the sun; ii) photoinduced charge separation and the generation of mobile carriers; iii) collection of electrons and holes at opposite electrodes. The ultrafast charge transfer process arises from funda-mental quantum uncertainty; mobile carriers are directly generated (electrons in the acceptor domains and holes in the donor domains) by the ultrafast charge transfer (≈70%) with ≈30% generated by exciton diffusion to a charge separating heterojunction. Sweep-out of the mobile carriers by the internal fi eld prior to recombination is essential for high performance. Bimolecular recombination dominates in materials where the donor and acceptor phases are pure. Impurities degrade performance by introducing Shockly–Read–Hall decay. 作者介绍： Alan J. Heeger , widely known for his pioneering research the fi eld of semiconducting and metallic polymers, is also the recipient of numerous awards, including the Nobel Prize in Chemistry (2000), the Oliver E. Buckley Prize for Condensed Matter Physics, the Balzan Prize for the Science of New Materials, and honorary doctorates from universities in the United States, Europe, and Asia. He is a member of the National Academy of Science (USA), the National Academy of Engineering (USA), the Korean Academy of Science, and the Chinese Academy of Science.  10.jpg  11.jpg  13.jpg |
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2014-01-04 13:08:16, 5.16 M
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