文档介绍：2012年职称英语《理工类A级》完形填空原文
Solar Power without Solar Cells
A dramatic and surprising ic effect of light discovered by University of Michigan1 researchers could lead to solar power without traditional semiconductor-based solar cells.
The researchers found a way to make an "optical 1 ," said Stephen Rand, a professor in the departments of Electrical Engineering puter Science, Physics and Applied Physics.
Light has electric and ponents. Until now, scientists thought the 2 of the ic field were so weak that they could be ignored. What Rand and his colleagues found is that at the right intensity, when light is traveling through a material that does not conduct electricity, the light field can generate ic effects that are 100 million times stronger than 3 expected. 4 these circumstances, the ic effects develop strength equivalent to a strong electric effect.
"This could lead to a new kind of solar cell without semiconductors and without absorption to produce charge separation," Rand said. "In solar cells, the 5 goes into a material, gets absorbed and creates heat. Here, we expect to have a very low heat load2. Instead of the light being absorbed, energy is stored in the ic moment3. Intense ization can be induced by intense light and then it is ultimately capable of providing a capacitive power 6."What makes this possible is a previously undetected brand of "optical rectification4