TY - JOUR
T1 - 4D scanning transmission electron microscopy (4D-STEM) reveals crystallization mechanisms of organic semiconductors on graphene
AU - Guo, Zixuan
AU - Ophus, Colin
AU - Bustillo, Karen C.
AU - Fair, Ryan
AU - Mannsfeld, Stefan C.B.
AU - Briseno, Alejandro L.
AU - Gomez, Enrique D.
N1 - Funding Information:
Funding from the Center for Self-Assembled Organic Electronics and the Office of Naval Research under Award N00014-19-1-2453 is acknowledged. Funding is also acknowledged from ARL (US Army)/Design and Synthesis of Materials for Agile Manufacturing under Award 19040007-AWD, with Subaward Number 10730-GR/10747-GR.
Funding Information:
The 4D-STEM work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The X-ray work is based on research conducted at the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.
Publisher Copyright:
© 2023, The Author(s), under exclusive licence to The Materials Research Society.
PY - 2023/2
Y1 - 2023/2
N2 - Organic semiconductor materials exhibit properties that enable use in various electrical devices, such as organic solar cells and field-effect transistors. It is challenging, however, to control molecular packing at organic–organic interfaces and also characterize the morphology at buried interlayers. Here, we demonstrate via vertical physical vapor transport the ability to grow single-crystalline bilayer organic semiconductors on graphene using two small molecules: zinc phthalocyanine (ZnPc), and 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA). We employ 4D-scanning transmission electron diffraction (4D-STEM) to directly observe the orientation distribution of ZnPc and PTCDA crystallites on graphene, explaining the different growth mechanisms of organic molecules on graphene substrates, and we predict the morphology of the stacked ZnPc/PTCDA heterojunctions. Graphical abstract: [Figure not available: see fulltext.]
AB - Organic semiconductor materials exhibit properties that enable use in various electrical devices, such as organic solar cells and field-effect transistors. It is challenging, however, to control molecular packing at organic–organic interfaces and also characterize the morphology at buried interlayers. Here, we demonstrate via vertical physical vapor transport the ability to grow single-crystalline bilayer organic semiconductors on graphene using two small molecules: zinc phthalocyanine (ZnPc), and 3, 4, 9, 10-perylenetetracarboxylic dianhydride (PTCDA). We employ 4D-scanning transmission electron diffraction (4D-STEM) to directly observe the orientation distribution of ZnPc and PTCDA crystallites on graphene, explaining the different growth mechanisms of organic molecules on graphene substrates, and we predict the morphology of the stacked ZnPc/PTCDA heterojunctions. Graphical abstract: [Figure not available: see fulltext.]
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U2 - 10.1557/s43579-022-00310-5
DO - 10.1557/s43579-022-00310-5
M3 - Article
AN - SCOPUS:85145672082
SN - 2159-6859
VL - 13
SP - 47
EP - 54
JO - MRS Communications
JF - MRS Communications
IS - 1
ER -