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在反向矿太阳能电池中构建高效的孔运输路径的 π 结合分子桥梁策略

Yehua Zhang^1,2, Ying Tang³, Zuhong Zhang³

¹Key Laboratory of Advanced Materials Chemistry and Devices (AMCD Lab) of the Department of Education of Inner Mongolia Autonomous Region, College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot, 010022, P.R. China.

Angewandte Chemie (International ed. in English)

|September 4, 2025

概括

一种新的分子2TPA-SP通过改善接口接触和置缺陷来提高矿太阳能电池 (PSC) 的性能和稳定性. 这导致了下一代光伏的更高的功率转换效率和长期运行可靠性.

科学领域:

材料科学
太阳能发电
有机电子

背景情况:

金属化太阳能电池 (PSC) 提供了下一代太阳能的潜力,但在效率和稳定性方面面临挑战.
自组装单层 (SAM) 被用作反向PSC的孔选择层 (HSL),但弱分子间力量限制了它们的有效性.
现有的SAM可以导致聚合,差的接口和重组损失,阻碍设备的性能.

研究的目的:

设计和合成一种新型的π结合分子,2TPA-SP,用于PSC中增强的孔选择性层.
使用2TPA-SP提高PSC的薄膜紧性,接口接触和缺陷被动化.
提高矿太阳能电池的效率和长期稳定性.

主要方法:

一个多功能 π 结合分子 (2TPA-SP) 与螺旋核和三胺单元的合成.
在反向矿太阳能电池架构中使用2TPA-SP作为选择性孔层.
分子相互作用的表征,膜形态,界面特性和设备性能 (PCE,稳定性).

主要成果:

2TPA-SP分子促进了强大的π-π堆叠,导致紧的薄膜和改善的界面覆盖.
在2TPA-SP中,甲基组有效地抑制了低协调的Pb2+缺陷.
设备达到26.45%的峰值功率转换效率 (PCE),并在运行1000小时后保持93.6%的初始效率.
一个10厘米×10厘米的迷你模块显示高的PCE为22.26%.

结论:

设计的2TPA-SP分子显著提高了矿太阳能电池的性能和稳定性.
分子设计解决了传统SAM的关键局限性,包括微弱的分子间相互作用和缺陷被动化.
2TPA-SP对高效矿光伏的可扩展和实际应用具有很大的前景.

关键词:

缺陷被动化接口工程矿太阳能电池自组装的单层堆叠

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