In the case of dye-based cells, which were invented at the Federal Polytechnic School ofLausanne, in Switzerland, in the 1990s, the light is first captured by molecules of aphotosensitive dye.
而在染料电池中,光会先被光敏染料的分子捕获。染料电池是在上世纪90年代由瑞士洛桑联邦理工学院发明的。
Tinker with the composition of this dye and you change the frequency of light that can becaptured. This makes dye-based cells more flexible than silicon ones.
稍微改变一下这种染料的成分,就可以让它吸收另一种频率的光。这个特性使染料电池比硅光电池更加灵活。
The dye molecules themselves are bound to tiny particles of titanium dioxide, a less-famoussemiconductor than silicon, and the whole assembly is immersed in an electrolyte andsandwiched between two electrodes.
光敏染料分子本身附着在二氧化钛微粒上,二氧化钛是种半导体,没有硅那么广为人知。
When a photon of light is absorbed by a dye molecule, an electron is knocked into thetitanium dioxide.
整个附着过程都是在电解液里两个电极之间进行的。当一个染料分子吸收一个光子时,一个电子就会受到碰撞,进入二氧化钛中。
From there it travels to one of the electrodes and a current is thus generated.
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