Interfacial electronic properties of pentacene tuned by a molecular monolayer of C-60

Liu, XianjieLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan (author)

Fine-tuning charge injection barriers between organic materials and electrodes is critical to optimize organic electronic device performance. Here we demonstrate that by modifying gold substrates with a monolayer of fullerene, significant decrease in the hole-injection barrier into pentacene films can be achieved. The insertion of the fullerene monolayer modifies the interfacial dipole and produces an interface where the pentacene molecules form a standing-up orientation with their long axis parallel to the surface normal. The latter effect lowers the vertical ionization energy of the pentacene molecules at the interface as compared to the pentacene-on-Au case, as well as improves the pi-pi overlap between the pentacene molecules that will likely enhance the transport properties in corresponding devices.

Zhan, YiqiangLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)yiqzh64 (author)
Braun, SlawomirLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)slama19 (author)
Li, FenghongLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)fenli90 (author)
Fahlman, MatsLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)matfa21 (author)
Linköpings universitetYtors Fysik och Kemi (creator_code:org_t)

In:Physical Review B. Condensed Matter and Materials PhysicsCollege Park, MD, United States : American Physical Society80:11, s. 115401-1-115401-71098-01211550-235X

By the author/editor: Liu, Xianjie; Zhan, Yiqiang; Braun, Slawomir; Li, Fenghong; Fahlman, Mats

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