Printed Nonfullerene Organic Solar Cells with the Highest Efficiency of 9.5%
Printed Nonfullerene Organic Solar Cells with the Highest Efficiency of 9.5%
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印刷%20非富勒烯%20有机%20太阳能%20细胞%20与%20%20最高%20效率%20的%209.5%
DOI：
10.1002/aenm.201701942
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发表时间：
2018-05-04
影响因子：
27.8
通讯作者：
Hou, Lintao
中科院分区：
文献类型：
--
作者：
Lin, Yuanbao;Jin, Yingzhi;Hou, Lintao
本文报道了一种基于PtB7-Th供体和3，9-bis(2-methylene-(3-(1，1-dicyanomethylene)-indanone))-5，5，11，11-tetrakis(4-hexylphenyl)-dithieno[2，3-d:2，3-d]-s-indaceno[1，2-b:5，6-b]dithiophene)(ITIC)受体的非富勒烯有机太阳能电池(OSCs)的高功率转换效率，其效率为9.54%，是印刷非富勒烯OSCs中报道的最高效率。此外，在柔性大面积(2.03 cm(2))无医生刀片的氧化铟锡(ITO)非富勒烯OSCs中实现了7.6%的高PCE，高于旋涂OSCs(5.86%)。为了了解刀片式印花增强性能的机理，研究了活性层的形貌、结晶度、电荷复合和输运。这些结果表明，医生刀片OSCs的良好性能归因于良好的纳米级相分离，加入0.6%的1，8-二碘辛烷，延长了医生刀片活性层的动态干燥时间，并有助于ITIC分子在干燥过程中的迁移。在柔性大面积无医生刀片非富勒烯OSC中获得了高的PCE，这表明医生刀片印刷在大规模无富勒烯OSC制造中是可行的。由于ITIC分子在溶剂挥发过程中的垂直分离，首次在添加1vol%的溶剂添加剂时使开路电压提高了0.1V。
The current work reports a high power conversion efficiency (PCE) of 9.54% achieved with nonfullerene organic solar cells (OSCs) based on PTB7-Th donor and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2,3-d]-s-indaceno[1,2-b:5,6-b]dithiophene) (ITIC) acceptor fabricated by doctor-blade printing, which has the highest efficiency ever reported in printed nonfullerene OSCs. Furthermore, a high PCE of 7.6% is realized in flexible large-area (2.03 cm(2)) indium tin oxide (ITO)-free doctor-bladed nonfullerene OSCs, which is higher than that (5.86%) of the spin-coated counterpart. To understand the mechanism of the performance enhancement with doctor-blade printing, the morphology, crystallinity, charge recombination, and transport of the active layers are investigated. These results suggest that the good performance of the doctor-blade OSCs is attributed to a favorable nanoscale phase separation by incorporating 0.6 vol% of 1,8-diiodooctane that prolongs the dynamic drying time of the doctor-bladed active layer and contributes to the migration of ITIC molecules in the drying process. High PCE obtained in the flexible large-area ITO-free doctor-bladed nonfullerene OSCs indicates the feasibility of doctor-blade printing in large-scale fullerene-free OSC manufacturing. For the first time, the open-circuit voltage is increased by 0.1 V when 1 vol% solvent additive is added, due to the vertical segregation of ITIC molecules during solvent evaporation.