Manufacturing Industry
Semiconductor nanocrystals generate multiple electrons.(EMERGING TECHNOLOGY)
Advanced Materials & Processes, April, 2006
A phenomenon called carrier multiplication, in which semiconductor nanocrystals respond to photons by emitting multiple electrons, has been discovered by researchers at Los Alamos National Laboratory, Los Alamos, N.M. The discovery increases the potential for nanocrystals as solar cell materials to produce higher electrical outputs than possible with current solar cells.
In papers published recently in the journals Nature Physics and Applied Physics Letters, the scientists demonstrate that carrier multiplication is not unique to lead selenide nanocrystals, but also develops with very high efficiency in nanocrystals of other compositions, such as cadmium selenide. In addition, these new results shed light on the mechanism for carrier multiplication, which likely...
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