Electronic structure and morphology of organic/metal/organic junctions
作者： N. J. Watkins , G. P. Kushto , A. J. Mäkinen
DOI: 10.1063/1.2952055
关键词: Materials science 、 Electronic structure 、 Scanning probe microscopy 、 Perylenetetracarboxylic dianhydride 、 Nanostructure 、 Optoelectronics 、 Organic semiconductor 、 Chemical reaction 、 Photoemission spectroscopy 、 Chemical physics 、 Heterojunction
摘要: We have investigated the electronic structures and morphologies of two organic–metal–organic junctions, relevant for organic bistable devices, photovoltaics, light emitting devices. Combined photoemission spectroscopy scanning probe measurements found that in a 3,4,9,10 perylenetetracarboxylic dianhydride bis-benzimidazole (PTCBI)/Ag/Cu-phthalocyanine (CuPc) junction, Ag undergoes chemical reaction with PTCBI leading to discontinuous film clusters. In contrast, Au forms continuous metal PTCBI/Au/CuPc junction no observable chemistry occurring. Photoemission suggests both heterojunctions exhibit barrierless charge recombination very similar functional behavior when integrated device despite significant morphological differences.
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