[22p-P13-1~28] 12.1 Fabrications and Structure Controls

[22p-P13-16] Morphological Observation of Binary Small Molecule Phase Separated Structure on the Order of Nanometer by OsO₄ Staining

〇Yosuke Murakami¹, Masato Kanno¹, Ami Tsuboi¹, Sae Nagai¹, Miki Kuribayashi¹, Yasuyo Nishida¹, Toshio Nishi¹, Yoshihiro Kudo¹ (1.Sony Group)

Keywords:Small Molecule, Phase separation

We have been studying a phase separation structure of several nm in size using a binary organic semiconductor containing C60. Using stacked samples, energy dispersive X-ray spectroscopy and HAADF-STEM mode of transmission electron microscopy confirmed that the C60 region was stained with OsO₄. In addition, phase separation structures are prepared by co-evaporation, and HAADF-STEM images are observed after OsO₄ staining. Small molecule crystals of the size of several nm dispersed in the OsO₄ dyed C60 region was able to be visualized.