Quantitative Characterization and Mechanism of Formation of Multilength-scale Bulk Heterojunction Structures in Highly Efficient Solution-Processed Small-Molecule Organic Solar Cells
作者： Yu-Ching Huang , Cheng-Si Tsao , Tzu-Yen Huang , Hou-Chin Cha , Dhananjaya Patra
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摘要: In this study we used simultaneous grazing-incidence small- and wide-angle X-ray scattering (GISAXS GIWAXS, respectively) to probe the multilength-scale structures of thin active layers comprising linear A–D–A-type π-conjugated donor molecule TBDTCNR fullerene acceptor PC61BM for use in solution-processed small-molecule-based organic solar cells (SMOSCs). We found that pseudo-two-dimensional fractal-like networks bulk heterojunction (BHJ) structure were determined by mutual interactions between small-molecule (SM) crystallites nanoscale clusters during their formation phase separation, deduced quantitatively, at multiple length scales, BHJ these SM clusters. also conducted situ GIWAXS measurements temporal behavior kinetics crystallization from solution solid film state. Our GISAXS/GIWAXS revealed fi...
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