MIT的研究者们将较低这个能级用磷原子所带电子来填充，他们加入到锗中的即是这种东西。

MIT researchers fill up the lower-energy state with extra electrons from phosphorous atoms, which they add to the germanium.

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两个电子具有较低的能级。

You have two electrons at much lower energy.

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这个额外的电子填充了传导带的较低能级，有效的导致了被激发的电子溢入较高，释放光子的能级。

The extra electron fills up the lower-energy state in the conduction band, causing excited electrons to, effectively, spill over into the higher-energy, photon-emitting state.

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这个额外的电子填充了传导带的较低能级，有效的导致了被激发的电子溢入较高，释放光子的能级。

The extra electron fills up the lower-energy state in the conduction band, causing excited electrons to, effectively, spill over into the higher-energy, photon-emitting state.

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