增强电场最大限度地降低了高性能锡-佩洛夫斯基特太阳能电池的准费尔米水平分割赤字
Jiahui Cheng1, Huijie Cao1, Shuming Zhang1
1Qingdao University of Science and Technology, Qingdao, 266042, China.
Advanced materials (Deerfield Beach, Fla.)
|October 12, 2024
概括
铁电聚合物二极管通过减少非辐射重组来抑制矿太阳能电池中的电压损失. 这一战略提高了设备的效率和长期稳定性.
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.
背景情况:
- 在矿/电子输送层 (ETL) 接口的非辐射重组导致矿太阳能电池 (PSC) 显著的开通电路电压 (VOC) 损失.
- 这种准费米水平分割 (QFLS) 缺口是限制PSC效率的关键因素,特别是在反转锡PSC中,并且未被充分探索.
研究的目的:
- 引入铁电聚合物二极管 (FPD),在矿/ETL接口上产生额外的电场.
- 为了抑制QFLS缺陷并减少反转锡PSC中的非辐射再组合.
- 提高公共服务中心的效率和稳定性.
主要方法:
- 在矿/ETL接口上加入铁电聚合物二极体 (FPD),特别是β-多聚 (1,1-二乙烯).
- 利用FPD的方向偏振来增强内置电场 (BEF) 并促进电荷转移.
- 研究FPD对矿结晶和表面能量障碍的影响.
主要成果:
- 在带有FPD的矿/ETL半堆叠装置中,QFLS缺陷从62至27meV减少.
- 优化的PSC实现了23.44%的功率转换效率,高开放电路电压 (VOC) 为0.88V.
- 加入FPD增加了离子迁移的激活能量,提高了设备的稳定性,在持续照明1100小时后,设备保持88%的效率.
结论:
- 铁电聚合物二极管有效抑制矿/ETL界面的非辐射重组和QFLS缺陷.
- 增强的内置电场和提高的矿质量有助于提高效率和VOC.
- 加入FPD显著提高了矿太阳能电池的运行稳定性.
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