The problem has been that high temperatures are necessary to power heat-based conversion systems, yet solar cell efficiency rapidly decreases at higher temperatures.

问题是热能转化系统需要更高的温度，而太阳能电池的效率在高温下迅速降低。

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The researchers say the fuel cell provided high power with reasonable efficiency and promising durability.

研究者表示燃烧电池在提供较高动力，并且能保持高效率的运转和拥有较高的持久性。

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Using a unique cell design, the company has created a high-efficiency mono-crystalline solar cell that could compete with SunPower.

通过对电池的设计研发，它们制造出了独一无二的高效能单晶太阳能电池，其性能可以和Sunpower公司生产的同期产品抗衡。

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Some silicon solar cell makers have been able to hit 21% on their best days, but doing so consistently and in high volumes are far more difficult. (Panel efficiency is usually a bit lower than cell efficiency).

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