期刊
ACS ENERGY LETTERS
卷 5, 期 4, 页码 1077-1082出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.0c00156
关键词
-
类别
资金
- Swiss National Science Foundation under Ambizione Energy Grant ICONS [PZENP2_173627]
- Swiss National Science Foundation (SNF) [PZENP2_173627] Funding Source: Swiss National Science Foundation (SNF)
The performance of a tandem solar cell depends on the performance of its constituting subcells. Although this dependency is theoretically straightforward for open-circuit voltage (V-oc) and short-circuit current, it is indirect for fill factor (FF) and thus for efficiency. We study here with simple simulations the effect on the tandem performance of each subcell FF by varying systematically their series resistance, parallel resistance, and local defect. We demonstrate that series resistance impacts strongly FF for single-junction devices but marginally for tandem devices, the opposite holding for parallel resistances (shunting). We show that localized defects will be most stringent to the tandem device when they occur in the current-limiting subcell. There is thus no obvious correlation between FFs of a tandem device and of its subcells. Finally, we compare two bottom-cell designs and highlight the importance of using a high-V-oc bottom cell to reach high tandem efficiencies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据