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英语阅读:有机太阳能电池

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英语阅读:有机太阳能电池

中国科学家在有机太阳能电池上实现了创纪录的17.3%的能量转换效率,标志着绿色电池的广泛应用向前迈进了一步。
 
 
有机光伏电池(OPVs)是由轻、软、半透明的碳基材料制成的。与传统的硅基太阳能板相比,它们可以印在薄薄的塑料卷上,更加环保。
 
 
然而,有机光伏在将阳光转化为电能方面效率较低,这意味着能量转换效率较低。
 
 
这项由天津南开大学的陈永生领导的新研究证明,有机物质的效率和硅一样高。
 
 
“有机材料的低电荷迁移限制了活性层的厚度和光吸收效率,”陈说。他的研究小组使用串联电池来解决这个问题,串联电池由不同层次的有机材料组装而成。
 
 
“串联细胞的不同层可以吸收不同波长的光。这意味着你可以更有效地利用阳光,实现更高的功率转化率。
 
 
研究人员表示,随着材料的进一步优化,预计OPVs可以达到与传统太阳能电池板相似的功率转换效率。
 
 
研究结果发表在周五的学术期刊《科学》上。

Chinese scientists have achieved a record 17.3 percent power conversion efficiency on organic solar cells, marking a step forward in the wide application of the green battery. 
 
Organic photovoltaic cells (OPVs) are made from carbon-based materials that are light, soft and semi-transparent. They can be printed on thin rolls of plastic and are more environmentally-friendly than traditional silicon-based solar panels. 
 
However, organic photovoltaics are less efficient at converting sunlight to electricity, meaning lower power conversion efficiency. 
 
The new study, led by Chen Yongsheng from Nankai University in north China's Tianjin, proved that the organics have the potential to be just as efficient as silicon. 
 
"Low charge mobility of organic materials limited the active layer thickness and light absorption efficiency," Chen said. His team used tandem cells, which are put together by different layers of organic materials, to address the problem. 
 
"Different layers of the tandem cells can absorb different wavelengths of light. That means you can use sunlight more effectively and achieve a higher power conversion rate," Chen said. 
 
With further optimization of the materials, it is expected that the OPVs can achieve similar power conversion efficiency as traditional solar panels, according to the researchers. 
 
The findings were published in the academic journal Science on Friday.

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