Ladder-Type Oligo-p-phenylene-Containing Copolymers with High Open-Circuit Voltages and Ambient Photovoltaic Activity,Journal of the American Chemical Society

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Ladder-Type Oligo-p-phenylene-Containing Copolymers with High Open-Circuit Voltages and Ambient Photovoltaic Activity
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2010-04-21 , DOI: 10.1021/ja909111p
Qingdong Zheng ₁ , Byung Jun Jung ₁ , Jia Sun ₁ , Howard E. Katz ₁

Affiliation

Four ladder-type oligo-p-phenylene containing donor-acceptor copolymers were designed, synthesized, and characterized. The ladder-type oligo-p-phenylene was used as an electron donor unit in these copolymers to provide a deeper highest occupied molecular orbital (HOMO) level for obtaining polymer solar cells with a higher open-circuit voltage, while 4,7-dithien-2-yl-2,1,3-benzothiadiazole or 5,8-dithien-2-yl-2,3-diphenylquinoxaline was chosen as an electron acceptor unit to tune the electronic band gaps of the polymers for a better light harvesting ability. These copolymers exhibit field-effect mobilities as high as 0.011 cm(2)/(V s). Compared to fluorene containing copolymers with the same acceptor unit, these ladder-type oligo-p-phenylene containing copolymers have enhanced and bathochromically shifted absorption bands and much better solubility in organic solvents. Photovoltaic applications of these polymers as light-harvesting and hole-conducting materials are investigated in conjunction with [6,6]-phenyl-C61-butyric acid methyl ester (PC(61)BM) or [6,6]-phenyl-C71-butyric acid methyl ester (PC(71)BM). Without extensive optimization work, a power conversion efficiency (PCE) of 3.7% and a high open-circuit voltage of 1.06 V are obtained under simulated solar light AM 1.5 G (100 mW/cm(2)) from a solar cell with an active layer containing 20 wt % ladder-type tetra-p-phenylene containing copolymer (P3FTBT6) and 80 wt % PC(61)BM. Moreover, a high PCE of 4.5% was also achieved from a solar cell with an active layer containing 20 wt % P3FTBT6 and 80 wt % PC(71)BM.

中文翻译：

具有高开路电压和环境光伏活性的梯形低聚对亚苯基共聚物

设计、合成和表征了四种含有供体-受体共聚物的梯型低聚对亚苯基。梯型低聚对亚苯基被用作这些共聚物中的电子供体单元，以提供更深的最高占据分子轨道 (HOMO) 能级，以获得具有更高开路电压的聚合物太阳能电池，而 4,7-二噻吩选择 -2-yl-2,1,3-benzothiadiazole 或 5,8-dithien-2-yl-2,3-diphenylquinoxaline 作为电子受体单元来调整聚合物的电子带隙以获得更好的光捕获能力. 这些共聚物表现出高达 0.011 cm(2)/(V s) 的场效应迁移率。与具有相同受体单元的含芴共聚物相比，这些梯形低聚对亚苯基共聚物具有增强的红移吸收带和更好的有机溶剂溶解性。结合 [6,6]-苯基-C61-丁酸甲酯 (PC(61)BM) 或 [6,6]-苯基-C71 研究这些聚合物作为光捕获和空穴传导材料的光伏应用-丁酸甲酯 (PC(71)BM)。在没有大量优化工作的情况下，在模拟太阳光 AM 1.5 G (100 mW/cm(2)) 下，从具有活性的太阳能电池获得了 3.7% 的功率转换效率 (PCE) 和 1.06 V 的高开路电压。层包含 20 重量％梯型含四对亚苯基的共聚物 (P3FTBT6) 和 80 重量％ PC(61)BM。此外，PCE 高达 4。

更新日期：2010-04-21

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