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23.83% efficient mono‐PERC incorporating advanced hydrogenation
Progress in Photovoltaics ( IF 6.7 ) Pub Date : 2020-01-24 , DOI: 10.1002/pip.3243
Ran Chen 1 , Hongbo Tong 2 , Haitao Zhu 2 , Chao Ding 2 , Hua Li 2 , Daniel Chen 1 , Brett Hallam 1 , Chee Mun Chong 1 , Stuart Wenham 1 , Alison Ciesla 1
Affiliation  

LONGi Solar Energy Technology Co. Ltd. has achieved 23.83% for a commercial p‐type Cz PERC cell. From a batch of over 40 000 cells, the average line efficiency achieved was 22.5%. R&D studies investigating hydrogenation and degradation show the importance of hydrogenation processes for efficiency improvements and controlling the hydrogen to prevent light‐induced degradation. Such degradation is shown to appear very differently under different illumination and temperature conditions. This degradation impacts VOC, ISC, and especially fill factor. Current injection and thermal anneal can be used to recover the degradation, but the recovery may not be stable. Reducing the hydrogen content within the cell is shown to minimise degradation without sacrificing performance, provided that enough hydrogen is retained to passivate boron‐oxygen defects.

中文翻译:

23.83%高效Mono-PERC结合了高级氢化

隆基太阳能科技有限公司的商用p型Cz PERC电池已达到23.83%。从一批超过4万个电池中,平均线路效率达到22.5%。研究氢化和降解的研发研究表明,氢化过程对于提高效率和控制氢以防止光诱导降解的重要性。在不同的光照和温度条件下,这种降解表现出非常不同的表现。这种退化的影响V OCSC,尤其是填充系数。电流注入和热退火可用于恢复降解,但恢复可能不稳定。如果保留足够的氢来钝化硼氧缺陷,减少电池中的氢含量可最大程度地降低降解而不牺牲性能。
更新日期:2020-01-24
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