The interaction between the energized electron and the hole it leaves behind is called an exciton, and the difference in energy levels between the hole and the electron is known as the bandgap.
这种获得能量的电子和他留在原来能级上对应的位置的空穴的相互作用叫做一个激子激发过程，而这两个不同能级之间的部分被称作带隙。
If the photon energy is greater than the bandgap of the cell material, then electrons are excited into the conduction band.
如果光子的能量高于电池材料的能带，那么电子就被激发到导带中。
Similarly, an electron outside the bandgap cannot lose a little bit of energy and fall just a little bit closer to the nucleus.
同样，电子以外的带隙不能失去一点点能源和秋天刚刚有点接近核心。
It must lose enough energy to fall past the bandgap into the area where electrons are allowed.
它必须失去足够的能量，属于过去的带隙纳入地方电子获准。
An electron must gain enough energy to move farther away from the nucleus, outside of the bandgap.
电子不能只是一点点能源和摆脱原子的核纳入隙。
Harvesting excess energy from above-bandgap photons could lead to solar cells which exceed conventional efficiency limits.
捕获高于半导体带隙的光子的能量会导致太阳能电池的效率超过传统的效率极限。
Selenide glasses have low material dispersion, high-energy bandgap, long-wavelength multiphonon edge and it's the perfect candidate for mid-far-infrared fibers.
硒化物玻璃具有低的材料色散、高的禁带宽度、长的多声子吸收边，是制备中远红外光纤的优秀材料。
Selenide glasses have low material dispersion, high-energy bandgap, long-wavelength multiphonon edge and it's the perfect candidate for mid-far-infrared fibers.
硒化物玻璃具有低的材料色散、高的禁带宽度、长的多声子吸收边，是制备中远红外光纤的优秀材料。
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