It is the most effective solarenergyconversion process on Earth and all power needs for a year could be met by the energy contained in the sunlight hitting the Earth in one hour.
If the energy of these hot electrons could be captured before it is converted into wasted heat, solar-to-electric power-conversion efficiencies could be increased to as high as 66%, say scientists.
科学家们称，如果这些热电子能够在转化成热能浪费掉之前被捕获，光电能量转化可以达到最高66%的效率。
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But solarenergy photovoltaic power cost is high and its conversion efficiency is low.