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Delayed phase separation in growth of organic semiconductor blends with limited intermixing
Author(s) -
Dieterle Johannes,
Broch Katharina,
Frank Heiko,
Duva Giuliano,
Storzer Timo,
Hinderhofer Alexander,
Novák Jiří,
Gerlach Alexander,
Schreiber Frank
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201600428
Subject(s) - materials science , phase (matter) , semiconductor , separation (statistics) , organic semiconductor , optoelectronics , chemistry , computer science , organic chemistry , machine learning
Binary mixed thin films of picene (C 22 H 14 , PIC) and pentacene (C 22 H 14 , PEN) consist of crystallites with a statistical occupation of the lattice sites by either PEN or PIC and unit cell parameters continuously changing with the mixing ratio. For high PIC ratios a PIC phase forms which corresponds to a limited intermixing of the two compounds. The growth behavior of these mixtures is investigated in situ and in real‐time using grazing incidence X‐ray diffraction. We observe a delayed phase separation in PIC‐rich blends, i.e. complete intermixing in the monolayer range and the nucleation of a pure PIC‐phase in addition to the intermixed phase starting from the second monolayer.Growth scenario of picene‐rich pentacene‐picene blends.