改造的异构接口将石太阳能电池提升到0.58V的开放电路电压
Sisi Jia1, Wenjie Zhu1, Chun Guo1
1Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province & Zhejiang Institute for Advanced Light Source, College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua, Zhejiang, 321004, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|September 5, 2025
概括
石太阳能电池的非金属改性使表面缺陷无效,并减少重组. 这一策略提高了开放电路电压 (VOC) 和功率转换效率 (PCE),从而提高了太阳能采集效率.
科学领域:
- 材料科学
- 可再生能源
- 半导体物理
背景情况:
- 石Cu2ZnSn(S,Se) 4 (CZTSSe) 太阳能电池在实现高开路电压 (VOC) 方面面临着挑战.
- 电荷载体在异质接口 (HEI) 的重组是CZTSSe太阳能电池性能的主要限制.
- 优化HEI对于减轻重组损失和提高设备效率至关重要.
研究的目的:
- 开发一种创新的非金属 (B) 修改策略,以优化 CZTSSe 太阳能电池中的 HEI.
- 解决高等教育机构的电荷载体重组问题,并加强VOC.
- 调查B-修改对表面被动化和带曲的影响.
主要方法:
- 使用非金属 (B) 改性方法对CZTSSe吸收器进行表面被动化.
- 在化过程中将B纳入HEI的近表面区域.
- B-诱导的缺陷 (BCu) 的表征及其对电子属性的影响.
主要成果:
- 通过和悬浮键而有效地使表面状态平静,而不会引入新的缺陷.
- B的扩散会产生弱的n型BCu供体缺陷,降低价值带最大值 (VBM) 并减轻费米水平的固定.
- 实现了13.35%的稳定功率转换效率 (PCE),增强了0.58V的VOC.
结论:
- 非金属B-修改是优化CZTSSe太阳能电池中的HEI的一个有希望的策略.
- 这种方法有效地减少了电荷载体重组,并改善了VOC.
- 乙基改造技术显示了推进石太阳能电池技术的巨大潜力.
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