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。
Can be designed into various form, the use of an integrated structure, can obtain higher output voltage and photoelectric conversion efficiency.
可以设计成各种形式，利用集成型结构，可获得更高的输出电压和光电转换效率。
How to get higher incident photon-to-current conversion efficiency and prolong the lifetime of the solar cells has been the focus in the past years.
如何获得更高的光电转换效率，延长整个电池的使用寿命一直是研究的焦点问题。
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