Organic bulk-heterojunction solar cells have been intensively studied recently because of their high performance and simple fabrication process. In this work, we improved the performance of poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b0]dithiophene-co-3-fluorothieno[3,4-b]thiophene-2-carboxylate]:[6,6]-phenyl-C70-butyric acid methyl ester (PTB7-Th:PC₇₁BM)-based organic solar cells (OSCs) by adding a hydrophilic gold nanorod (Au NR) mixture to the hole transport layer and a hydrophobic Au NR mixture to the active layer. The cooperative localized surface plasmon resonance effect of a Au NR mixture containing Au NRs with lengths of 23, 35, and 47 nm enhanced light absorption of the OSCs over a broad wavelength range. Consequently, the average power conversion efficiency (PCE) of the OSCs was significantly improved from 8.82 to 9.89%, owing mainly to improvement of the short-circuit current density (from 16.3 to 17.9 mA cm⁻²). The highest PCE of 10.31% was obtained in the best plasmonic OSC, demonstrating that doping with complementary Au NR mixtures is a simple and effective method of fabricating high-performance thin film OSCs.

由于其高性能和简单的制造工艺，有机体异质结太阳能电池最近得到了广泛的研究。在这项工作中，我们提高了聚[4,8-双（5-（2-乙基己基）噻吩-2-基）苯并[1,2-b：4,5-b0]二噻吩-co-3-的性能氟噻吩并[3,4-b]噻吩-2-羧酸]：[6,6]-苯基-C70-丁酸甲酯（PTB7-Th：PC ₇₁通过将亲水金纳米棒（Au NR）混合物添加到空穴传输层和将疏水Au Au NR混合物添加到有源层来实现基于BM）的有机太阳能电池（OSC）。包含长度为23、35和47 nm的Au NR的Au NR混合物的协同局部表面等离子体激元共振效应增强了OSC在宽波长范围内的光吸收。因此，OSC的平均功率转换效率（PCE）从8.82％显着提高到9.89％，这主要是由于短路电流密度（从16.3mA cm ^-2改善）所致。在最佳等离子OSC中获得了最高的10.31％的PCE，这表明用互补的Au NR混合物进行掺杂是制造高性能薄膜OSC的一种简单有效的方法。