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接口异面连接使高效的PbS量子点太阳能电池成为可能
Li Zhang1, Yong Chen1, Shuang Cao1
1State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), School of Material Science and Engineering, Nanjing University of Posts and Telecommunications (NJUPT), 9 Wenyuan Rd., Nanjing, 210023, China.
概括
研究人员通过使用聚乙烯胺 (PEIE) 接口层改进了体量子点 (CQD) 太阳能电池. 这种PEIE层抑制了重组损失,提高了CQD设备的功率转换效率 (PCE).
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 太阳能光伏发电是如何实现的
背景情况:
- 体量子点 (CQD) 是溶液处理光电子技术的关键.
- 在CQD的表面缺陷导致重组损失,限制设备的性能.
- 在CQD接口上有效的电荷提取对于设备效率至关重要.
研究的目的:
- 为了提高基于CQD的光电子设备的性能.
- 为了减轻CQD接口的非辐射重组损失.
- 为了提高CQD太阳能电池中的电荷提取效率.
主要方法:
- 在CQD接口上加入一个薄的聚乙烯胺 (PEIE) 层.
- 在CQD和电荷传输层之间形成接口异质连接.
- 使用生命周期测量对载体重组和提取动态的描述.
主要成果:
- PEIE层有效地保护了CQD接口,抑制了陷辅助的非辐射重组.
- 接口异质连接调节载体动力学,提高电荷提取效率.
- 载体提取寿命从0.72ps减少到0.46ps.
- PbS CQD太阳能电池的功率转换效率 (PCE) 从12.2%提高到13.4%.
结论:
- 使用PEIE的接口异质连接策略在提高CQD光电子设备性能方面是有效的.
- PEIE充当防护屏障,优化CQD接口上的载波动态.
- 这种方法为开发高效解决方案加工的CQD太阳能电池提供了可行的途径.
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