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Directed Self‐Organization Ensured Enhancement of Charge Carrier Mobilities in a Star‐Shaped Organic Semiconductor
Author(s) -
Birudula Srikanth,
Prabhu Deepak D.,
Ghosh Tapan,
B. Adara,
Das Suresh,
Vijayaraghavan Ratheesh K.
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202001615
Subject(s) - organic semiconductor , materials science , annealing (glass) , semiconductor , pedot:pss , electron mobility , bilayer , charge carrier , optoelectronics , nanotechnology , molecule , membrane , chemistry , layer (electronics) , biochemistry , organic chemistry , composite material
Controlled self‐organization of organic semiconductor molecules into specifically desired architectures on substrates of interest is one of the most imperative challenges faced in the fabrication of high‐performance organic electronic devices. Herein, we report the self‐organization of a star‐shaped molecule FDT‐8 into a highly favored structure, namely, a vertical stack. Thermal annealing of films of FDT‐8 deposited on PEDOT: PSS coated ITO substrates was observed to assist the organization of the molecules into columnar stacks. A significant enhancement in the hole (≈50‐fold) and the electron (≈13‐fold) carrier mobility was observed in single‐carrier devices upon thermal annealing that could be attributed to the aforementioned self‐organization. The ability of these molecules to spontaneously self‐organize was utilized to fabricate bilayer light‐emitting devices.