| 1. | OSL uses light to excite electrons and cause the emission of photons.
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| 2. | They come from excited electrons relaxing from higher energy levels to lower ones.
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| 3. | Infrared is too weak, it can't excite electrons sufficiently to power an organism.
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| 4. | However, these primary electrons carry far too much energy to directly excite electrons.
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| 5. | Excited electrons in the Sun give off light as photons.
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| 6. | The excited electrons are injected into the conduction band of the TiO 2 electrode.
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| 7. | In essence, the spin of the excited electron is reversed.
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| 8. | The excited electron whizzes off, leaving a positively charged ion.
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| 9. | Charge carriers ( such as thermally excited electrons ) constantly diffuse around inside a conductive material.
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| 10. | These excited electrons can tunnel across the barrier.
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