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ÇóÄÄλ´óÏÀ°ïÎÒ·ÒëÕâ¶Î»°£¬²»Ê¤¸Ð¼¤£¡ One dimensional nanostructures have been demonstrated to be efficient in photoelectrochemical (PEC) cell and photo- voltaic cell applications because they can decouple the directions of light absorption and charge carrier collection. 20,21 When the lifetime of the minority carrier is short, the minority carrier can recombine in bulk before it reaches the semi- conductor/electrolyte junction. However, because nanowires have a small radius, the minority carrier can diffuse to the surface before recombination. This can increase charge separation efficiency, especially when the minority carrier diffusion length is comparable to the radius of the nanowire. |
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