隧穿结对具有中间层的非晶硅/微晶硅叠层电池的影响  

Influence of Tunnel-Junction Insertion on Interlayer Structured a-Si:H/μc-Si:H Tandem Cells

作　　者：靳果[1,2] 王记昌 JIN Guo;WANG Jichang(Henan Polytechnic Institute,Nanyang 473000,China;Northwest University,Xi'an 710069,China)

机构地区：[1]河南工业职业技术学院,南阳473000 [2]西北大学,西安710069

出　　处：《真空科学与技术学报》2021年第2期193-200,共8页Chinese Journal of Vacuum Science and Technology

基　　金：河南省2020年科技发展计划(项目编号:202102210134);2020年南阳市科技计划项目(项目编号:KJGG207);河南工业职业技术学院青年骨干教师培养计划。

摘　　要：为了改善非晶硅/微晶硅叠层电池的载流子输运效果,将隧穿结引入到具有中间层结构的叠层电池中,研究了隧穿结的结构、掺杂浓度、厚度等条件对叠层电池性能的影响。实验结果表明,叠层电池中引入隧穿结构成"隧穿结-中间层"结构,可以进一步改善电池性能,经过结构和参数优化的隧穿结可以提高子电池的电流密度匹配度,提升叠层电池转换效率。加入"隧穿结-中间层"结构的叠层电池具有较高的转换效率和光照稳定性,并且得到了初始转换效率12.2%,光照衰退率9%的叠层电池。A tunnel-junction,comprising n^(+) and p^(+) layers,was inserted into the a-Si:H/μc-Si:H tandem cells with an interlayer structure to improve the carrier transport efficiency.The influence of the properties of tunnel-junction,including the microstructures,dopant-content and thickness of n^(+)/p^(+) layers,on the performance of the tandem cells was experimentally investigated for optimization of the tunnel-junction synthesis.The preliminary results show that the insertion of an optimized tunnel-junction matters.To be specific,the tunnel-junction increased the initial conversion efficiency up to 12.20%,decreased the light degradation rate down to 9%,and improved the light-soaking stability of the tandem cells,because of the enhancement of carrier transport efficiency and because of the alleviation of short-circuit current-density mismatching of sub-cells.Possible mechanisms responsible for enhancement of carrier transport efficiency were also tentatively discussed in a thought provoking way.

关 键 词：薄膜太阳电池 非晶硅/微晶硅叠层电池 隧穿结 电流密度匹配 稳定性 

分 类 号：TM914[电气工程—电力电子与电力传动]