Realizing over 10% efficiency in polymer solar cell by device optimization
Realizing over 10% efficiency in polymer solar cell by device optimization
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DOI：
10.1007/s11426-014-5273-x
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
Shaoqing Zhang;L. Ye;Wenchao Zhao;Bei Yang;Qi Wang;Jianhui Hou
中科院分区：
文献类型：
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作者：
Shaoqing Zhang;L. Ye;Wenchao Zhao;Bei Yang;Qi Wang;Jianhui Hou
在前期工作的基础上，合成了以苯并二噻吩（BDT）-噻吩并[3，4-B]噻吩（TT）为骨架的低带隙聚合物PBDT-TS 1，并对PBDT-TS 1/PC 71 BM的体相异质结（BHJ）材料进行了优化和表征。通过采用不同的添加剂1，8-二碘辛烷（DIO）、1-氯萘（CN）和1，8-辛二硫醇（ODT）对活性层进行处理，并优化各添加剂在主溶剂中的比例，在CB中使用3%DIO作为处理添加剂的条件下，获得了9.98%的高PCE。原子力显微镜（AFM）和透射电子显微镜（TEM）的测量，解释了光伏参数的变化，说明了不同的添加剂对光伏性能的影响。这些结果为PBDTTT聚合物器件优化中溶剂添加剂的选择提供了有价值的信息，系统的器件优化可以应用于其他高效光伏聚合物。显然，这项工作提出了一个很大的进步，在单结PSC，特别是与传统的结构的PSC。
The low band gap polymer based on benzodithiophene (BDT)-thieno[3,4-b]thiophene (TT) backbone, PBDT-TS1, was synthesized following our previous work and the bulk heterojunction (BHJ) material comprising PBDT-TS1/PC71BM was optimized and characterized. By processing the active layer with different additives i.e. 1,8-diiodooctane (DIO), 1-chloronaphthalene (CN) and 1, 8-octanedithiol (ODT) and optimizing the ratio of each additive in the host solvent, a high PCE of 9.98% was obtained under the condition of utilizing 3% DIO as processing additive in CB. The effect of varied additives on photovoltaic performance was illustrated with atomic force microscopy (AFM) and transmission electron microscope (TEM) measurements that explained changes in photovoltaic parameters. These results provide valuable information of solvent additive choice in device optimization of PBDTTT polymers, and the systematic device optimization could be applied in other efficient photovoltaic polymers. Apparently, this work presents a great advance in single junction PSCs, especially in PSCs with conventional architecture.