Center for Polymers and Organic Solids, University of California at Santa Barbara , Santa Barbara, California 93106, United States.
Nano Lett. 2011 Mar 9;11(3):1036-9. doi: 10.1021/nl200056p. Epub 2011 Jan 26.
Bulk heterojunction (BHJ) layers based on poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) were fabricated by two methods: codeposition of P3HT/PCBM from a common solvent (conventional BHJ) and by sequential, layer-by-layer deposition of P3HT/PCBM from separate solvents (layer-evolved BHJ). Thermally annealed layer-evolved BHJ solar cells show power conversion efficiencies and electron/hole mobilities comparable to conventional BHJ solar cells. The nanomorphology of both active layers is compared in situ by transmission electron microscopy (TEM) using a multilayer cross-sectional sample architecture. No significant difference is observed between the nanomorphology of the conventional BHJ and layer-evolved BHJ material implying that the bulk heterojunction forms spontaneously and that it is the lowest energy state of the two component system.
基于聚（3-己基噻吩-2,5-二基）（P3HT）和[6,6]-苯基 C61 丁酸甲酯（PCBM）的体异质结（BHJ）层通过两种方法制备：从共同溶剂共沉积 P3HT/PCBM（常规 BHJ）和从单独溶剂顺序、逐层沉积 P3HT/PCBM（层演化 BHJ）。热退火的层演化 BHJ 太阳能电池显示出与常规 BHJ 太阳能电池相当的功率转换效率和电子/空穴迁移率。通过使用多层横截面样品结构的透射电子显微镜（TEM）原位比较两个活性层的纳米形态。在常规 BHJ 和层演化 BHJ 材料的纳米形态之间没有观察到显著差异，这表明体异质结自发形成，并且是两个组件系统的最低能量状态。
