调节表面潜力最大限度地提高了全矿合器的电压
Hao Chen1, Aidan Maxwell1, Chongwen Li1,2
1The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
Nature
|November 15, 2022
概括
新的分子减少宽带间隙矿太阳能电池的电压损失. 这一突破提高了矿太阳能电池和合器件的功率转换效率和稳定性.
科学领域:
- 材料科学
- 可再生能源
- 太阳能发电
背景情况:
- 与较窄的带隙太阳能电池相比,宽带隙矿太阳能电池具有显著的开放电路电压 (VOC) 缺陷.
- 这种缺陷主要归因于电子输送层接触时的VOC限制重组,这是由于表面潜在的不均性和能量对齐不佳造成的.
- 现有的单表面处理方法不足以解决这些问题.
研究的目的:
- 研究和减轻宽带间隙矿太阳能电池的开放电路电压 (VOC) 缺陷.
- 改善矿-电子传输层界面的能量对齐和表面电位均性.
- 提高矿太阳能电池和合装置的功率转换效率 (PCE) 和运行稳定性.
主要方法:
- 引入二分子,特别是1,3-二,以修改矿表面状态.
- 修改表面状态以实现更均的表面潜力的空间分布.
- 单连接矿太阳能电池和单质全矿太阳能电池的制造和特征.
主要成果:
- 处理增加了90meV的准费米水平分裂.
- 取得了1.79 eV的矿太阳能电池,具有1.33V的OC和19%以上的PCE.
- 开发了一种单质全矿合太阳能电池,其VOC值为2.19V (89%的详细平衡限),PCE超过27% (26.3%经过认证).
- 在500小时运行后,双重设备保留了超过86%的初始PCE.
结论:
- 分子有效地被动化矿表面状态并改善能量对齐,显著降低VOC缺陷.
- 开发的表面处理使得高性能,稳定的宽带间隔矿太阳能电池和合装置成为可能.
- 这一进步是实现矿光伏在高效太阳能转换方面的全部潜力的关键一步.
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