Role of Solvent Trapping Effects in Determining the Structure and Morphology of Ternary Blend Organic Devices
Role of Solvent Trapping Effects in Determining the Structure and Morphology of Ternary Blend Organic Devices
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DOI：
10.1021/ma802632y
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发表时间：
2009-03
期刊：
影响因子：
5.5
通讯作者：
Kerry B. Burke;W. Belcher;L. Thomsen;B. Watts;C. McNeill;H. Ade;P. Dastoor
中科院分区：
文献类型：
--
作者：
Kerry B. Burke;W. Belcher;L. Thomsen;B. Watts;C. McNeill;H. Ade;P. Dastoor
我们展示了扫描透射x射线显微镜（STXM）测量由聚（3-己基噻吩）（P3HT），[6,6]-苯基- c61 -丁酸甲酯（PCBM）和[2,3,12,13-四氰-5,10,15,20-四基（3,5-二叔丁基苯基）卟啉]铜（II） （Cu(CN)4P）卟啉三元共混物构建的体异质结有机太阳能电池的结果。这些结果表明，由于卟啉在薄膜中溶剂捕获的证据。退火后，在三元共混膜中观察到亚微米的凹陷，对应于溶剂的演变，这与在凹陷中间相分离的小卟啉聚集体有关。凹陷的面密度和大小随三元共混物中卟啉浓度的变化而有系统的变化。讨论了观察到的形貌与先前测量的器件性能之间的关系。
We present results of scanning transmission X-ray microscopy (STXM) measurements of bulk heterojunction organic solar cells built from a ternary blend of poly(3-hexylthiophene) (P3HT), [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), and [2,3,12,13-tetracyano-5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrinato]copper(II) (Cu(CN)4P) porphyrin. These results show evidence of solvent trapping due to porphyrin in the film. Upon annealing, submicrometer depressions are observed in the ternary blend films, corresponding to the evolution of solvent that is associated with the small porphyrin aggregates that phase segregate in the middle of the depressions. The areal density and size of the depressions change systematically with porphyrin concentration in the ternary blend. The relationship of the observed morphologies to the previously measured device performance is discussed.