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增加聚合物分子量可以实现低供体含量,高效和可扩展的半透明有机太阳能电池

Martín Martín-Ruiz¹, Paula Pinyol-Castillo^1,2,3, Xabier Rodríguez-Martínez⁴

¹Institute of Materials Science of Barcelona, ICMAB-CSIC Campus Universitat Autònoma de Barcelona 08193 Bellaterra Barcelona Spain mcampoy@icmab.es.

Journal of materials chemistry. A

|March 2, 2026

概括

有机光伏 (OPV) 中的高分子量聚合物提高了效率和透明度. 这项研究表明,增加聚合物分子重量可以增强电荷传输,使半透明的OPV高效,即使降低了供体含量.

科学领域:

有机光伏 (OPVs) 的使用
材料科学材料科学材料科学
能源转换能源转换

背景情况:

非富勒烯接受器提高了OPV的效率.
减少供体含量增加了透明度,但降低了功率转换效率 (PCE) 和电气性能.
高聚合物分子重量 (M_w) 被探索以平衡PCE和透明度.

研究的目的:

调查高聚合物M_w是否可以在半透明的OPV中实现高PCE和透明度.
检查PTB7-Th:IEICO-4F混合物与不同的混合比率和聚合物M_w.
评估聚合物M_w对薄膜形态,电荷载体移动性和设备性能的影响.

主要方法:

研究了PTB7-Th:IEICO-4F与57kDa和125kDa的聚合物M_w的混合物.
分析了混合比率及其对PCE和透明度的影响.
评估了可扩展性因素,包括制造条件,溶剂,细胞面积和模块制造.
将这个概念扩展到其他聚合物和接受器系统.

主要成果:

将PTB7-Th M_w从57 kDa增加到125 kDa,改善了膜形态和电荷载体的移动性.
高M_w PTB7-Th使高PCEs能够实现,其聚合物含量低至28%.
改善的透和更高的接受器结晶性解释了增强的性能.
在可扩展性评估过程中,细胞面积被确定为对PCE产生负面影响的最关键因素.

结论:

高聚合物分子重量是有效的半透明OPV的可行策略.
通过优化聚合物M_w,可以同时实现高PCE和透明度.
这些发现可将其推广到其他聚合物接受器系统,表明其广泛适用性.

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