了解Cu2ZnSn(S,Se)4太阳能电池中辐射和非辐射重组的效率损失
Shreyash S Hadke1, Zhenghua Su2, Qingbo Meng3,4
1Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
Nature communications
|September 8, 2025
概括
铜锡硫化硫化太阳能电池显示电压有所改善,但非辐射损失仍然存在. 需要对深度缺陷进行进一步的研究,以提高性能并达到理论效率极限.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 太阳能光伏发电是如何实现的
背景情况:
- 铜锡硫化 (CZTSSe) 太阳能电池为低成本,高效的能源转化提供了潜力.
- 性能目前受到开放电路电压损失 (ΔVOC),特别是辐射 (ΔVOCRad) 和非辐射 (ΔVOCNrad) 组件的限制.
研究的目的:
- 分析近期高效率CZTSSe设备中 ΔVOC 的来源 (接近15%).
- 确定限制进一步性能改进的关键因素,并建议未来的研究方向.
主要方法:
- 在CZTSSe太阳能电池中对开放电路电压损失 (ΔVOC) 的分析.
- 辐射 (ΔVOCRad) 和非辐射 (ΔVOCNrad) 损失机制的比较.
- 对J0重组参数的评估与ΔVOCNrad的关系.
主要成果:
- 由于带隙波动和乌尔巴赫尾巴造成的辐射损失 (ΔVOCRad) 显著减少,与商业Cu(In,Ga)(S,Se) 2 (CIGS) 细胞相比.
- 与重组参数J0相关的非辐射损失 (ΔVOCNrad) 显示只有适度的改善.
- 为了与CIGS的性能竞争,J0需要减少四到六个数量级.
结论:
- 虽然CZTSSe中的辐射损失接近商业CIGS水平,但非辐射损失仍然是一个主要的瓶.
- 解决深层缺陷以减少ΔVOCNrad对于CZTSSe太阳能电池接近其理论效率极限至关重要.
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