13 September 2012 GISAXS studies of initial growth mode and nanostructure of bulk heterojunction layers in planar type metal pthanlocyanine molecules
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Abstract
ZnPc and CuPc molecules stacked similar way in the film, but showed different growth modes in thermal evaporation. The distribution of CuPc crystals did not change by the film thickness, whereas the distribution of ZnPc became random as the increase of the film thickness. The disc type nanograins of CuPc were quite regularly distributed at the initial growth regime and the regular distribution of nanograins was kept during the film growth. On the other hand, ZnPc consisted in ellipsoid shaped nanograins and the distribution of nanograins was not regular in the initial growth regime. The irregular distribution of nanograins changed to the regular mode at the later growth regime by showing structure factor in GISAXS measurement. The different initial nanograin distribution in ZnPc and CuPc was related to the different nanostructure in the mixed layer with C60 to form the bulk heterojunction.
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Hyo Jung Kim, Ji Whan Kim, Hyun Hwi Lee, Byeondu Lee, Jang-Joo Kim, "GISAXS studies of initial growth mode and nanostructure of bulk heterojunction layers in planar type metal pthanlocyanine molecules", Proc. SPIE 8477, Organic Photovoltaics XIII, 84771C (13 September 2012); doi: 10.1117/12.929324; https://doi.org/10.1117/12.929324
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