Zhang Kai, Hu Zhicheng, Duan Chunhui, Ying Lei, Huang Fei, Cao Yong
Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, People's Republic of China.
Nanotechnology. 2013 Dec 6;24(48):484003. doi: 10.1088/0957-4484/24/48/484003. Epub 2013 Nov 6.
Significant performance enhancement was observed for the bulk-heterojunction polymer solar cell of ITO/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3' -benzodithiazole)]:[6,6]-phenyl C71 butyric acid methyl ester (PCDTBT:PC71BM)/Al when the as-cast active layer was rinsed with methanol before the deposition of the metal electrode. Comparison of independent anode interfacial layers of PEDOT:PSS and MoO3 indicated that the effects of methanol treatment on the improvement of device performance are more pronounced for PEDOT:PSS-based devices. No discernible changes can be observed in film thickness, surface topography and UV-vis absorption profiles of the photoactive layer, indicating the absence of film reconstruction and the improvement of device performance are hence attributed to the modification of the interface between the PEDOT:PSS and the fresh active layer. Further examination of the devices containing a cathode interlayer of poly[(9,9-bis(3'-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN) also demonstrates the potential modification of the interface between the PEDOT:PSS and the active layer by methanol in addition to the widely observed PFN functionality.
当在沉积金属电极之前用甲醇冲洗铸态活性层时，观察到氧化铟锡/聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）/聚[N - 9″ - 十七烷基 - 2,7 - 咔唑 - 交替 - 5,5 - （4',7' - 二 - 2 - 噻吩基 - 2',1',3' - 苯并二噻唑）]：[6,6] - 苯基C71丁酸甲酯（PCDTBT:PC71BM）/铝的本体异质结聚合物太阳能电池有显著的性能提升。对PEDOT:PSS和三氧化钼独立阳极界面层的比较表明，甲醇处理对基于PEDOT:PSS的器件性能改善的影响更为显著。在光活性层的膜厚度、表面形貌和紫外 - 可见吸收光谱中未观察到明显变化，这表明不存在膜重构，器件性能的改善因此归因于PEDOT:PSS与新鲜活性层之间界面的改性。对含有聚[(9,9 - 双(3' - (N,N - 二甲基氨基)丙基)-2,7 - 芴)-交替 - 2,7 - (9,9 - 二辛基芴)]（PFN）阴极夹层的器件的进一步研究还表明，除了广泛观察到的PFN功能外，甲醇还可能对PEDOT:PSS和活性层之间的界面进行改性。
